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  • 2000  (43)
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  • Life Sciences (general)  (287)
  • 1
    Electronic Resource
    Electronic Resource
    Wastewater treatment by the HCR-processUpdated lecture from the 17 Annual Meeting of Biotechnologists (organized by the DECHEMA e.v.), Wiesbaden, 27-29 April 1999. (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 119-128 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The increasing requirements in wastewater treatment have led to the development of new wastewater treatment processes based on the know-how and experience in reaction and process engineering of the chemical industry. Due to their compactness, closed operation and high flexibility, these new processes show a large potential for process integration and significant cost reduction in particular for highly polluted industrial wastewaters.This paper discusses the HCR (high-performance compact reactor) - process, developed at the Mass Transfer Laboratory of the Technical University of Clausthal within the last decade. This process has been realized in more than 30 technical applications with a volume loading of up to 70 kg COD/m3 d and an energy consumption of about 0.4 kWh per kg CODelim.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200206
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  • 2
    Electronic Resource
    Electronic Resource
    Comprehensive cellulose chemistry. Weinheim, New York, Chichester, Brisbane, Singapore, Toronto: Wiley-VCH Verlag. Vol. 1: Fundamentals and Analytical Methods. XXII + 260 pages, 65 figures, 57 tables; DM 234.00. Vol. 2: Functionalization of Cellulose. XVI + 389 pages, 121 figures, 63 tables; DM 264.00. ISBN 3-527-29413-9. ISBN 3-527-29489-9 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 147-148 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200208
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  • 3
    Electronic Resource
    Electronic Resource
    Environmental interaction of Clays-Clays and the environment. Berlin, Heidelberg, New York, Barcelona, Budapest, Hong Kong, London, Milan, Paris, Singapore, Tokyo: Springer-Verlag. XIV + 271 pages, 74 figures, 10 tables; DM 128.00. ISBN 3-540-58738-1 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 160-160 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200210
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  • 4
    Electronic Resource
    Electronic Resource
    Variation revealed by RAPD-PCR profiles of microsymbiont Anabaena azollae strains from four N2 fixing Azolla cultures (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 169-174 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Nitrogen fixing Anabaena azollae strains isolated from four different Azolla cultures were characterized based on their total protein profile and RAPD profile to study the existing variation among them. As expected, the isolates showed almost similar protein banding patterns, but exhibited differences in 40-70 KDa protein subunits. Polymerase chain reaction of the DNA of the isolates, using four different primers, amplified specific sequences of DNA and showed clear polymorphism among the isolates. The RAPD profile generated the fingerprinting pattern characteristic of each strain based on the sequence of the primers used. Common band sharing observed between the strains A. azollae-RS-KK-SK-AM and A. azollae-RS-KK-SK-RP probably represents maternal inheritance of DNA to the progeny. The polymorphic bands were generated specifically for the isolates A. azollae-RS-KK-SK-RP and A. azollae-RS-KK-SK-AM with primers numbered 2 and 4, respectively, which could be developed as possible markers for these isolates.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200212
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  • 5
    Electronic Resource
    Electronic Resource
    Development of transgenic rice pure lines by particle bombardment-mediated transformation and genetic analysis-based selection (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 175-183 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Mature seed-derived callus from an elite Chinese japonica rice cv. Eyl 105 was transformed with a plasmid containing the selectable marker hygromycin phosphotransferase (hpt) and the reporter β-glucuronidase (gusA) genes via particle bombardment. After two rounds of selection on hygromycin (30 mg/l)-containing medium, resistant callus was transferred to hygromycin (30 mg/l)-containing regeneration medium for plant regeneration. Twenty-three independent transgenic rice plants were regenerated from 127 bombarded callus with a transformation frequency of 18.1%. All the transgenic plants contained both gusA and hpt genes, revealed by PCR/Southern blot analysis. GUS assay revealed 18 out of 23 plants (78.3%) proliferated on hygromycin-containing medium had GUS expression at various levels. Genetic analysis confirmed Mendelian segregation of transgenes in progeny. From R2 generations with their R1 parent plants showing 3:1 Mendelian segregation, we identified three independent homozygous transgenic rice lines. The homozygous lines were phenotypically normal and fertile compared to the control plants. We demonstrate that homozygous transgenic rice lines can be obtained via particle bombardment-mediated transformation and through genetic analysis-based selection.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200213
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  • 6
    Electronic Resource
    Electronic Resource
    Gentechnik, Biotechnik. Stuttgart: Wissenschaftliche Verlagsgesellschaft mbH, 632 pages, 53 tables, 500 figures; DM 168.00 ISBN 3-8047-1597-4 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 202-202 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200304
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  • 7
    Electronic Resource
    Electronic Resource
    Flow cytometric monitoring of Rhodococcus erythropolis and Ochrobactrum anthropi in a mixed culture (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 219-233 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The GRAM-positive bacterium Rhodococcus erythropolis K2-3 and the GRAM-negative Ochrobactrum anthropi K2-14 are capable of synergistically degrading 4-(2,4-dichlorophenoxy)butyric acid (2,4-DB). The two strais execute this task in a symbiotic manner, but the nature of the interaction involved in the degradation is only partially understood as yet. An essential first step in elucidating the interaction is to be able to monitor the two strans separately, at the cellular level, within mixed populations. Therefore a method exploiting fluorescently labelled lectin probes was developed. Since Concanavalin A (Con A) binds specifically to R. erythropolis K2-3, it was selected and linked to the fluoresent dye Bodipy 630/650, which has an excitation maximum in the red part of the visible light spectrum. Forward light scatter (FSC) and DNA fluorescence from both strains were also measured to obtain simultaneous information about their physiological states. The three parameters were conveniently monitored by dual and triple excitation flow cytometry in conjunction with double fluorescent staining techniques. In addition, the strains were identified using an epifluorescence microscope. These techniques were found powerful tools for the population analysis of this mixed bacterial system.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200306
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  • 8
    Electronic Resource
    Electronic Resource
    Scientific methodology for complex systems: Macroscopic patterns in eco- and anthropo-sphere (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 235-274 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: A quite unconventional, innovative scientific methodology called “macroscopic pattern analysis” is presented in this paper. This approach is more adequate in the case of complex systems than the well-known microscopic, mechanistic approach. Complex systems are not only attracting more engineering interest, but their scientific treatment is increasingly wanted by society due to the manifold problems in Earth's ecosphere. The macroscopic pattern approach will be explained in depth and illustrated in some case studies from the ecosphere (sustainability, hurricanes and avalanches), where nature serves as a teacher for the solution of the sustainability problem. Then, a series of case studies on macropatterns are described showing the problem-solving capacity for anthropo- and technosphere: sustainability in society with an index of sustainability, the eco-social market economy with eco-tech as an instrument, biokinetics, bioreactor mixing and integrated bioprocessing with models, design of cars and houses and even quality of life as an attempt to quantify macropatterns.The innovations are briefly compared in their problem-solving capacity with known approaches such as the microscopic method in science, technology and society (free market economy), including the evaluation of other indices and cleaner production, industrial ecology and zero emission initiative. Finally, a deeper integration of sciences, ethics, arts and nature will be introduced based on the vision with macroscopic pattern analysis, where the different domains of human life are integratable to effect a reconciliation.
    Additional Material: 22 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200308
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  • 9
    Electronic Resource
    Electronic Resource
    Biomining: Theory, microbes and industrial processes. Berlin, Heidelberg, New York, London, Paris, Tokyo, Hong Kong: Springer-Verlag XII + 302 pages, 80 figures, 27 tables; DM 184.00 ISBN 3-540-63252-2 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 30-30 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200105
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  • 10
    Electronic Resource
    Electronic Resource
    Dynamic responses of biofilters to changes in the operating conditions in the process of removing toluene and xylene from air (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 17-29 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The dynamic behaviour of biofilters intended to remove toluene and xylene from air was studied during transient states. Laboratory scale biofilters were filled with a mixture of peat, bark and wood and inoculated with a mixed microbial population. Toluene and xylene were applied both as single pollutants and as mixtures. Attention was focused on the evaluation of the following transients: the response of biofilters to step changes and peaks in pollutant concentrations, the effect of changes between single and multiple pollutant loadings and the response to shutdown periods.The biofilters demonstrated a good dynamic stability during transient states induced by change in inlet pollutant concentrations. Their time periods did not exceed three hours. No interaction between xylene and toluene degradation was observed during changes in loading with single pollutants or their mixture. The performance interruptions lasting less than 24 hours were found to have no significant influence on the removal efficiency of biofilters. When the biofilters were reacclimated after longer starvation periods, a short temporary decrease in efficiency whose minimum and duration were proportional to the length of a preceding shutdown period was observed. The longest starvation period (7 days) resulted in a reacclimation lasting 7 hours only. Adaptations of a microbial population to new operating conditions as well as sorption/desorption processes were suggested as the main factors influencing the dynamic reponse characteristics.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200104
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  • 11
    Electronic Resource
    Electronic Resource
    In vivo decolourization of the polymeric dye poly R-478 by corncob cultures of Phanerochaete chrysosporium (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 31-38 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: In this paper, the in vivo decolourization of the polymeric dye Poly R-478 by semi-solid-state cultures of Phanerochaete chrysosporium BKM-F-1767 (ATCC 24725) was investigated, employing corncob as a support. In order to stimulate the ligninolytic system of the fungus, the cultures were supplemented with veratryl alcohol (2 mM) or manganese (IV) oxide (1 g/l).Maximum manganese-dependent peroxidase (MnP) and lignin peroxidase (LiP) activities of around 2,000 U/l and 400 U/l were attained by the former, whereas the activities reached by the latter were of about 1,500 U/l and 200 U/l, respectively. Furthermore, laccase activity (around 150 U/l) was only detected in manganese (IV) oxide supplemented cultures.The polymeric dye Poly R-478 (0.02 w/v) was added to three-day-old cultures. A percentage of biological decolourization of about 85% was achieved using cultures supplemented with veratryl alcohol, whereas MnO2 cultures showed a rather lower percentage of around 58% after nine days of dye incubation. Moreover, a correlation between MnP activity and Poly R-478 decolourization could be observed, indicating that this enzyme is mainly responsible for dye degradation.In the present work, the in vivo decolourizing capability of the ligninolytic complex secreted by P. chrysosporium was investigated under the above-mentioned cultivation conditions, employing a model compound, such as the polymeric dye Poly R-478.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200106
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  • 12
    Electronic Resource
    Electronic Resource
    Editorial (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 187-187 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200302
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  • 13
    Electronic Resource
    Electronic Resource
    Reduction of halogenated derivatives of benzoic acid to the corresponding alcohols by Desulfovibrio vulgaris PY1 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 189-201 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Desulfovibrio vulgaris strain PY1 was isolated from a 3-chlorobenzoic acid (3CBA) degrading anaerobic enrichment culture, using anaerobic Percoll density centrifugation. When grown on pyruvate (20 mM), in the absence of sulphate and under strict anaerobic conditions, this organism converted not only the co-substrates benzoate (BA), 3-amino-BA and 3CBA to the corresponding alcohols but also ten other different halogenated benzoic acids, viz., 4-Cl-, 3-Br-, 4-Br-, 3-I-, 3-F-, 4-F-, 2,4-di-Cl-, 2,5-di-Cl-, 3,4-di-Cl- and 3,5-di-Cl-BA. This was verfied with HPLC and GC/MS spectrometric analyses. The yields of the co-substrate converted after 30 days of growth were between 20% and 88%, depending on the compounds which had been added at initial concentrations of 500 μM. Sulphate, sulphite, thiosulphate and disulphite inhibited the formation of 3-Cl-benzyl alcohol (3CBOH), i.e. a 97 to 99% inhibition, and nitrate and sulphur had no effect (a 7-10% inhibition). In cell-free extracts, the reduction of 3CBA to 3CBOH required strict anaerobic conditions, pyruvate or H2 as electron donors and the addition of methylviologen (MV), FAD, FMN or ferredoxin as electron carriers. The specific activity of the reduction of 3CBA to 3CBOH in crude extract was 5.3 nmol/(mg protein min). The reaction was not inhibited by additions of sulphate or sulphite (5 mM), but was completely inhibited at concentrations of 10 mM 3CBA or 50 mM BA. A carboxylic acid reductase (aldehyde dehydrogenase), which acted on non-activated 3CBA and was responsible for the reduction of 3CBA to 3-Cl-benzaldehyde, was found in the solube fraction (94% of the total activity). These results demonstrate that strain PY1 was able to effectively reduce a wide range of halogenated benzoic acids to the corresponding alcohols.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200303
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  • 14
    Electronic Resource
    Electronic Resource
    Socio-ecological strategies for future sustainability a review of an internet conference (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 203-218 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The recent upsurge in information technology has provided the international community with an easy access to professional journals (e.g. Electronic Journal of Biotechnology at http://www.ejb.org; etc.), discussion groups (e.g. bioenergy@cret.org; digestion@crest.org; etc.) and recently to electronic international conferences (e.g. ICIBS; http://www.cid.harvard.edu/cidbiotech, etc.) as well as a series of biotechnological information material (e.g. http://www.psrast.org, etc.) to stay in contact and receive up-to-date information in biotechnology. There is no doubt that this new technology will be more cost effective in future and reach more people in communities around the globe.This review reports on one such an electronic conference aiming at bridging the communication gap between developed and developing countries. This conference dealt with integrated biosystems and has provided an excellent forum for more than 100 active participants from all regions of the world. As has been demonstrated in this review, the conference was able to show the very different approaches towards the use of biotechnology in developed and developing countries, cold and tropical climate regions owing to their different ecological, economical and societal problems. It also demonstrated very clearly that the field of molecular genetics and/or genetic engineering is not a priority issue in developing countries, but rather the need for clean technologies, multiproduct formation through socio-economic integrated biosystems, e.g. incorporating microbial waste management into agro-industries, in human activities and their roles in creating better health conditions, a better environment and sustain development.It is hoped that this review will lead to a greater use of the electronic facilities available to inform and educate both the northern and the southern communities more readily of their needs and requirements to improve understanding and efforts for a sustainable future.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200305
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  • 15
    Electronic Resource
    Electronic Resource
    Application of zeolites in the downstream processing of the character impact compound 2,5-dimethyl-4-hydroxy-furan-3-one (furaneol) (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 275-288 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The purpose and scope of this article is to introduce capable zeolites into downstream processing of natural compounds, especially flavour compounds like 2,5-dimethyl-4-hydroxy-3(2H)-furan-3-one (Furaneol®Furaeol is a registered trademark of FIRMENICH, Ch). The synthesis and the recovery of Furaneol from L-rhamnose are presented. Therefore adsorption isotherms of the zeolites ZSM5 and DAY with varying modules have been determined and adsorption experiments using model and reaction mixtures of Furaneol synthesis were performed and will be discussed.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200309
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  • 16
    Electronic Resource
    Electronic Resource
    Formation of aminium lactates in lactic acid fermentation. Fermentative production of 1,4-piperazinium-(L,L)-dilactate and its use as a starting material for the synthesis of dilactide (Part 2) (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 289-304 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: A fermentation process for manufacturing 1,4-piperazinium-(L,L)-dilactate from renewable raw materials and a method for processing this product into L,L-dilactide are described. Lactic acid fermentation with Lactobacillus paracasei was modified in such a way that pH control occurred by using an aqueous solution of piperazine as a correcting agent instead of sodium hydroxide solution. The production of a stoichiometrically composed piperazinium lactate was possible when the pH was 5.0. From 5.0 kg of glucose and 2.15 kg of piperazine, 6.65 kg of 1,4-piperazinium-(L,L)-dilactate were formed in the fermentation process. Separation from fermentation broth, purification and concentration of the product in aqueous solutions were carried out by means of ultrafiltration, nanofiltration and electrodialysis. Total product retention by the membranes used was about 33%. The crystalline salt was obtained by vacuum evaporation. Processing of the 1,4-piperazinium-(L,L)-dilactate into L,L-dilactide was performed in a special glass reactor. A product yield of 70% was achieved. The purified product was characterized by elementary analysis, as well as solubility behaviour, polarity and spectroscopic data. An overall process consisting of the stages fermentation, purification and concentration of piperazinium dilactate as well as cyclization of the latter to dilactide is described.
    Additional Material: 9 Ill.
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    URL: http://dx.doi.org/10.1002/abio.370200310
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  • 17
    Electronic Resource
    Electronic Resource
    Sanitization of immobilized biocatalysts for the production of 6-aminopenicillanic acid (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 161-168 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Five different chemical reagents and γ-rays were tested for the sanitization of immobilized biocatalysts with high penicillin G acylase (PGA) activity. The most effective chemical reagents were N-cetyl-N,N,N-trimethylammonium bromide (CTAB) and 2-isopropyl-5-methylphenol (thymol). The optimum concentration of CTAB for the treatment of the immobilized enzyme was 0.25% [w/v] and 1 h, for immobilized cells 0. [w/v] and 3 h. The optimum concentration of thymol for the immobilized enzyme was found to be 0.1% [w/v] and 1 h, for immobilized cells 0.27% [w/v] and 2 h. The optimum dose of γ-rays for the sanitization of the immobilized enzyme was established as 3.2 kGy, for immobilized cells as 4.5 kGy.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200211
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  • 18
    Electronic Resource
    Electronic Resource
    Chemical sensors and biosensors for medical and biological applications. Chichester, New York, Weinheim, Brisbane, Singapore, Toronto: John Wiley & Sons XII + 413 pages, 82 figures, 41 tables; DM 198.00, ISBN 3-527-28855-4 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 234-234 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200307
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  • 19
    Electronic Resource
    Electronic Resource
    Advanced primary treatment of waste water using a bio-flocculation-adsorption sedimentation process (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 53-64 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: An advanced primary treatment process for a municipal waste water was systematically studied, using a bio-flocculation-adsorption, sedimentation and stabilzation process (BSS). It was shown that the organic removal efficiency was higher than that of the traditional primary treatment processes but lower than that of the traditional secondary treatment processes. Both adsorption and bio-flocculation played an important role in the removal of pollutants. The activated sludge within the bio-flocculation-adsorption tank could be considered a bio-flocculent which improved the quality of the effluent from the primary treatment process. As the effluent of the BSS process did not meet the requirements for a typical secondary effluent, the process may be regarded as an advanced (or enhanced) primary treatment process, suitable for waste water containing a high concentration of suspended solids and colloidal particles.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200109
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  • 20
    Electronic Resource
    Electronic Resource
    Airborne bacteria and fungal spores in the indoor environment. A case study in Singapore (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 67-73 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The concentration of airborne fungal spores and bacteria as related to room temperature, humidity and occupancy levels within a library building in Singapore was determined. Measurement of indoor air quality with respect to microorganisms is of particular importance in tropical environments due to the extensive use of air-conditioning systems and the potential implications for human health. This study has revealed a number of interesting relationships between the concentrations of fungal spores and bacteria in relation to both environmental and human factors. The levels of fungal spores measured in the indoor environment were approximately fifty times lower than those measured outside, probably because of the lowered humidity caused by air-conditioning in the indoor environment. The variation in fungal spore concentration in the outdoor environment is likely to be due to the diurnal periodicity of spore release and the response to environmental factors such as light temperature and humidity. The indoor concentration of fungal spores in air was not clearly correlated to concentrations measured in air outside of the library building and remained relatively constant, unaffected by the difference in the numbers of occupants in the library. In contrast, the indoor concentrations of bacteria in air were approximately ten times higher than those measured outdoors, indicating a signficant internal source of bacteria. The elevated levels of indoor bacteria were primarily attributed to the number of library occupants. Increased human shedding of skin cells, ejection of microorganisms and particulates from the respiratory tract, and the transport of bacteria on suspended dust particles from floor surfaces probably accounts for the strong positive correlation between occupancy levels and the concentration of bacteria in internal air.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/abio.370200111
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    Electronic Resource
    Electronic Resource
    Masthead (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000) 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200201
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  • 22
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    Conference Announcement. 11. Weltkongress biotechnology 2000 in Berlin: The molecular key for biotechnology (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 96-96 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200203
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  • 23
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    Innovative use of Thiobacillus ferrooxidans for the biological machining of metals (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 87-96 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Preliminary results on the novel use of the bacterium Thiobacillus ferrooxidans (ATCCJ 3598 and ATCC33020) for the micro-machining (or biomachinig) of metals are reported. Biomachning is a controlled microbiological process to selectively form microstrucutures on a metal work-piece by metal removal (or dissolution) using microorganisms. Applying copper and mild steel as work-pieces, it was shown that the mass removed increased proportionately with machining time. In another experiment, the work-pieces were coated with organic photo-resistive materials to mask (i.e. protect) certain regions of the metlas, thereby defining the microstructure to be formed. The unmasked regions were successfully biomachined; the final machined profile was shown to be similar to the coating image on the original metal. Although biomachining proceeded at a slower rate than chemical machining, the undesired leaching of the metal in the region under the masked area (termed undercutting) was not as severely encountered when compared with the latter. This work demonstrates the potential use of microorganisms for the biomachining of metals. As a “green process”, the innovative use of T. ferrooxidans for the micro-machining of metals opens up the possibility of biomachining as an alternative to conventional metal processing.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200202
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  • 24
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    Improvement of the bioavailability of hydrocarbons by applying nonionic surfactants during the microbial remediation of a sandy soil (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 99-118 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: During the microbial treatment of a sandy model soil artificially contaminated with polycyclic aromatic hydrocarbons (PAHs), a large residual pollution was found. The remainig PAHs were sorbed into the micropores of the soil and were therefore not bioavailable. Using a lab-scale precolator, the microbially pretreated soil was subjected to aftertreatment with surfactants with the aim of further degradation of its pollution. Two commercial nonionic surfatants of the polyethoxylate type, Präwozell F1214/5 N and Sapogenat T-300, were used. The surfactants differ both in their physicochemical properties (CMC value, PAH solubilization capacity, adsorption onto soil) and in their microbial degradability. During aftertreatment under permanently aerobic conditions, only a weak PAH accumulation in the liquid phase was observed, which was due to a low solubilization rate as well as to simultaneous microbial degradation of the dissolved PAHs. Temporary anaerobiosis successfully suppressed the microbial degradation of both the surfactant and the solubilized PAHs, resulting in a more intensive PAH accumulation. But the PAH content of the soil - the essential criterion for evaluating the efficiency of surfactant application - was not decreased to a larger extent with surfactants than without them. To find out why the surfactants failed to act, the surfactant and hydrocarbon distribution among the liquid and solid phases was studied in mixtures of phenantherne-spiked solis and Präwozell-containig liquids; at heavy phenanthrene loading, the aqueous phase was saturated with PAH; at weak loading, it was unsaturated. Model-aided data analysis showed that the soil may contain PAH in two fractions: strongly sorbed into soil pores and, in the case of heavy loading, also weakly attached to the soil surface. The latter is easily extractable, resulting in a PAH-saturated liquid, while strongly adsorbed PAH is only partially dissolved due to competition between the micelles and the soil pores for the PAH. The microbially pretreated soil contains only strongly bound PAHs, which are as difficult to extract by surfactants as they are poorly accessible for microbes.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200205
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    Influence of crude oil contamination on the bacterial community of semiarid soils of Patagonia (Argentina) (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 129-146 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Autochthonous bacteriocenoses in semiarid soils in Patagonia were found to be capable of rapidly adapting to high contamination with crude oil. This adaptation at community level is due to the selective enrichment of hydrocarbon-utilizing bacteria always present in these soils. Immediately after a heavy contamination with crude oil, the authochthonous bacteriocenosis contained about 28% hydrocarbon-utilizing bacteria which could be classified into eight ecotypes with characteristic metabolic profiles. Mainly n-alkanes were used as growth substrates of representative strains. After seven months' exposure to crude oil, the bacteriocenosis consisted almost entirely of hydrocarbon-utilizing bacteria. At least fourteen ecotypes were distinguishable, and the majority of representative strains were able to metabolize a broad spectrum of aliphatic and aromatic hydrocarbons. Corresponding to the significant alteration of the physiological diversity, drastic changes to the taxonomic diversity were also found. Whereas at the beginning of the study the autochthonous bacteriocenoses were dominated by GRAM-positive genera of the Actinomycetales (Dietzia, Gordona, Nocardia, Rhodococcus, Streptomyces) with high ecological potency, after just two months' exposure to crude oil, GRAM- negative bacteria (especially Pseudomonas stutzeri) became predominant within the hydrocarbon-utilizing bacteriocenoses accompanied by some GRAM-positive genera of the Actinomycetales with a significantly lower abundance. These findings underline the importance of Pseudomonas and some genera of Actinomycetales for processes of natural attenuation and the technically supported in situ bioremediation of soil polluted by crude oil in Patagonia.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200207
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  • 26
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    Optimization of some parameters of solid state fermentation of wheat bran for protease production by a local strain of Rhizopus oryzae (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 149-159 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Some parameters of the production of an alkaline protease by Rhizopus oryzae in the solid state fermentation of wheat bran were optimized. Using the optimum parameters of an inoculum age of 7 days, an incubation time of 9 days, an amount of CZAPEK-DOX (liquid medium) of 6 ml/g bran and an incubation temperature of 33°C, an activity of 50 U/g bran was achieved. The initial pH of the CZAPEK-DOX medium had little effect. Re-incubation of mouldy bran with only fresh CZAPEK-DOX yielded 3 times total activity compared to single-cycle fermentation. As for the effect of the amount CZAPEK-DOX medium, the water constituent contributed more to activity increase than did the salt component. The ARRHENIUS activation energies were 23 and 7.9 kcal/mole below and above the optimum of 33°C, respectively. In all the studies, along with protease production, variation of protein content and specific activity were also observed. Attempts were made to explain the effects and also gauge their implications for large-scale production.
    Additional Material: 4 Ill.
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    URL: http://dx.doi.org/10.1002/abio.370200209
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    Molecular genetics of plant development. Cambridge, New York, Melbourne: Cambridge University, 365 pages, 165 figures, 2 tables; $ 39.95 (paperback) ISBN 0-521-58784-0 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 184-184 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200214
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  • 28
    Electronic Resource
    Electronic Resource
    Masthead (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000) 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200301
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  • 29
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    Investigation into the biotechnological modification of wood and its application in the wood-based material industry (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 305-312 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Because of the growing utilization of renewable raw materials, the technical use of lignocellulosic fibres from wood and other annual plant materials is becoming increasingly important. The conventional production process of fibreboards is characterized by high-energy consumption and use of ecologically insecure synthetic lesins. Approximately 40 to 45% of the total energy expenditure are used for the thermo-mechanical pulping. Because of high plastication temperatures, an inactive lignin crust on the fibre surface is formed. For that reason, for glueing of the fibres, urea formaldehyde and melamin resins are usually used. The costs for the resin amount to approximately 50% of the entire material costs. In addition, environmental problems are caused. The aim of our investigation is the reduction of energy and resin consumption by enzymatic modification of wood chips and the enzymatic activation of the inherent bonding strength of the material. The first industrial use of fungi for the modification of wood was in the production of “Myco wood”. Pleurothus ostreatus and Trametes versicolor were applied for nonsterile delignification of beech wood. The present investigation of the authors deals with the mycological pre-treatment of wood chips in order to reduce the energy consumption during wood pulping. The screening results favour the brown rotter Gleophyllum trabeum for pinewood (Pinus silvestris) and the white rotter Trametes hirsuta for beech (Fagus silvatica). Both species show resistance against mould fungi. The use of submerged inoculum of these fungi has the advantage over wheat inoculum that the lag phase is less than 12 hours and that the addition of nutrients or fungicides is not necessary. Short-time wood chip incubation results in a 40% decrease of energy consumption during thermo-mechanical pulping and in improved fibreboard properties. Lignin reduction could not be determined by gravimetrical and x-ray microanalysis.Comparative investigations of fibre incubation using laccase, a submerged culture of Trametes versicolor and rape straw fibres show a high increase in bending and tensile strength and an improvement in the hygroscopic properties of glue-free fibre boards for the last two incubation kinds. Similar effects have been obtained incubating pine wood fibres for the production of fibre sheets with enzyme medium of Trichoderma reseei.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200311
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    Biotechnological applications in the oil industry (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 335-350 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: During the 20th century, important relationships developed between the oil industry and both microbiological and biotechnological research. Basic microbiological research has played an important role in both the exploration and production sectors of the oil industry, but as the maturity of the industry has progressed, such contributions have been relegated with respect to their importance. With respect to refining and petrochemicals manufacture, process routes have been extensively researched, but only rarely have the biotechnological solutions developed satisfied the economic criteria that resulted in major investment. In fact, situations exist where investment has occurred, but project life was unrealistically short, suggesting a need for extreme caution when evaluating biotechnological processes for the oil industry. However, as far as engineered processes for both biotreatment and bioremediation are concerned, the fundamental research that has underpinned other areas of hydrocarbon microbiology will finally prove to be of both technical and economic value, in ensuring that the essential needs of treatment, rather than disposal, and restoration, rather than environmental destruction, can be satisfied by the oil and other industries involved in both geochemical manipulation and natural resource exploitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200314
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    The influence of growth rate and growth-limiting factors on the production of ice nuclei in Pseudomonas syringae CCM 4073 in continuous culture (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 369-372 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The influence of different growth-limiting factors - namely the sources of carbon, nitrogen and phosphorus and the dilution (growth) rate - on the ice-nucleation activity of Pseudomonas syringe CCM 4073 was studied. A higher ice-nucleation activity was observed at a lower dilution (growth) rate (D = 0.1 h-1) than at a higher dilution (growth) rate (D = 0.3 h-1). Remarkable differences in ice-nucleation activity were found in its dependence on the growth-limiting factor. The highest ice-nucleation activity was observed under carbon limitation (T90 = -2.7°C), a medium activity under nitrogen limitation (T90 = -5°C) and lowest activity under phosphorus limitation (T90 = -12.3°C). After the addition of excess nitrogen or phosphorus to steady-state cultures, the ice-nucleation activity was restored.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200316
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    Imaging living cells. Berlin, Heidelberg, New York, London, Paris, Tokyo, Hong Kong: Springer-Verlag, 1999 XXI + 394 pages, 97 figures, 39 tables; DM 179.00 ISBN 3-540-65051-2 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 39-40 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200107
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    Manual of industrial microbiology and biotechnology. Washington, D. C.: ASM Press, 1999 830 pages; £ 59.00 ISBN 1-55581-128-0 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 65-65 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200110
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    Laborhandbuch für die Untersuchung von Wasser, Abwasser und Boden. Weinheim, New York, Chichester, Brisbane, Singapore, Toronto: Wiley-VCH Verlag GmbH, XII + 232 pages, 43 figures, 46 tables; DM 78.00 ISBN 3-527-28888-0 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 74-74 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200112
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  • 35
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    Use of various coffee industry residues for the cultivation of Pleurotus ostreatus in solid state fermentation (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 41-52 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Studies were carried out to evaluate the feasibility of using coffee industry residues, viz. coffee husk, coffee leaves and spent coffee ground as substrates in solid state fermentation (SSF) to cultivate edible mushrooms Pleurotus. Eight strains of Pleurotus ostreatus and two strains of Pleurotus sajor-caju were screened on a medium prepared from aqueous extract of coffee husk and agar. Based on best mycelial growth (9.68 mm/day) and biomass production (43.4 mg/plate in 9 days at 24°C), the strain P. ostreatus LPB 09 was selected for detailed studies. SSF was carried out using these substrates under different moisture conditions (45-75%) and spawn rates (2.5-25%). In general, although a 25% spawn rate appeared superior, the 10% spawn rate was recommended for all the three substrates in view of the process economics, as there was not any significant difference in the increase with 10 to 15%. The ideal moisture content for mycelial growth was 60-65% for coffee husk and spent coffee ground, and 60-70% for coffee leaves. The biological efficiency (BE), which is defined as the ratio of the weight of fresh fruiting bodies to the weight of dry substrate, multiplied by 100, and which indicates the fructification ability of the fungus for utilizing the substrate, was best with coffee husk. With coffee husk as the substrate, the first fructification occurred after 20 days of inoculation, and the biological efficiency reached about 97% after 60 days. When coffee leaves were used as the substrate, no fructification was observed even upon prolonged cultivation. With spent ground as the substrate, the first fructification occurred 23 days after inoculation and the biological efficiency reached about 90% in 50 days. There was a significant decrease in the caffeine and tannin contents (61 and 79%, respectively) of coffee husk after 60 days. It was remarkable to observe that caffeine was adsorbed onto the fruiting body (0.157%), indicating that it was not completely degraded by the fungal culture. However, no tannins were found in the fruiting body, indicating that the fungal strain was capable of degrading them. The results showed the feasibility of using coffee husk and spent coffee ground as substrates without any pre-treatment for the cultivation of edible fungi in SSF, and provided one of the first steps towards an economical utilization of these otherwise unutilized or poorly utilized residues.
    Additional Material: 3 Ill.
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    URL: http://dx.doi.org/10.1002/abio.370200108
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    A model for biopigment formation by Serratia marcescens biovar A2/6 in batch cultures containing lactic acid and beef extract (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 75-81 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Serratia marcescens biovar A2/A6 is able to produce a red pigment as a secondary metabolite which has antimicrobial activity. This paper describes its growth and biopigment formation in batch cultures, in media containing different concentrations of lactic acid and beef extract as carbon and nitrogen sources, respectively. An unstructured model has also been developed to describe its growth, lactic acid uptake and biopigment formation. The comparison of simulated and experimental data shows that the proposed model predicts reasonably well the system behaviour over a range of conditions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200113
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    Mutation breeding. Theory and Practical Applications. Cambridge: Cambridge University Press 353 pages, 18 figures, 5 tables; $ 120.00 ISBN 0-85404-750-6 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 97-98 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200204
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  • 38
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    Electronic Resource
    Masthead (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000) 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200101
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    Press Release (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 334-334 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200313
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  • 40
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    The impact of hydrocarbon remediation (diesel oil and polycyclic aromatic hydrocarbons) on enzyme activities and microbial properties of soil (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 313-333 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The impact of hydrocarbon remediation on several enzyme activities (catalase, dehydrogenase, lipase, protease, urease, alkaline phosphomonoesterase, fluorescein diacetate hydrolysis) and microbial properties (biomass-C, respiration, N-mineralization, qCO2, microbial counts) was evaluated in a laboratory study over a period of 10 weeks. A pristine soil was contaminated with diesel oil (10 mg/g soil) or with a mixture of phenanthrene and naphthalene (total amount 1 mg/g soil) and supplemented with inorganic nutrients to give a C:N ratio of 20:1. The corresponding controls consisted of uncontaminated nutrient-supplemented soil. Oil contamination caused a significant initial increase of all biological parameters measured. In the presence of PAHs, biomass-C, respiration, protease activity and heterotrophic counts were significantly enhanced, while urease activity was depressed. N-mineralization was initially, however, reversibly inhibited in the presence of oil and PAHs.The measured parameters behaved differently over time: Biomass-C, respiration and alkaline phosphomonoesterase activity reached a maximum activity after about 2-5 weeks, corresponding to the period during which the majority of hydrocarbons disappeared, and declined thereafter to the background level. Activities of catalase and dehydrogenase also followed this pattern, however, were characterized by fluctuations. Activities of lipase, protease, urease and fluorescein diacetate hydrolysis increased and remained almost constant throughout the incubation period.
    Additional Material: 10 Ill.
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    URL: http://dx.doi.org/10.1002/abio.370200312
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  • 41
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    Action as a dynamic property of the genotype × environment interation implications for biotechnology (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 351-368 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The action resonance theory (ART), a hypothesis based on a logical extension of EINSTEIN's theory of Brownian movement, suggests that the genotype × environment interaction can be modelled as forceful encounters of the gene-products of an organism with its environment. This model has implications for molecular and cell biology, morphogenesis, evolutionary development via mutation, the mechanism of natural selection and overall function of ecosystems, extending SCHRÖDINGER's programme for molecular biology. Action, a thermodynamic property with the same physical dimensions as angular momentum and PLANCK's quantum of action, is proposed to be reversibly generated as a result of the molecular exchange of quanta, which become resonant at equilibrium, corresponding to an optimum degree of entropy and action for living systems. Because the theory can potentially predict solutions to unsolved problems such as the folding of proteins it has strong implications for successful genetic modification of organisms and for biotechnology in general; the design of a programme of research to test this theory is proposed. A key element in this research programme, improving productivity and sustainability, would be the need to select genetically modified strains in the ecological environment or niche in which they are required to function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200315
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  • 42
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    Encyclopedia of molecular biology. (Four-volume set; first edition). New York, Chichester, Weinheim, Brisbane, Singapore, Toronto: John Wiley & Sons, Inc., 1999, 2878 pages with over 2,000 entries and 900 figures; £ 925.00, ISBN 0-471-15302-8 (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 16-16 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370200103
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    Continuous preparative liquid chromatography in the downstrem processing of biotechnological productsUpdate lecture from the 17 Annual Meeting of Biotechnologists (organized by the DECHEMA e. v.), Wiesbaden, 27-29 April 1999. (2000)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 20 (2000), S. 3-15 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Continuous counter-current chromatographic processes have been successfully used in the petrochemical and sugar industry over the last 30 years. Only recently has simulated moving bed (SMB)-technology attracted widespread interest in the pharmaceutical industry, mainly as a very efficient system for chromatographic enantioseparation. The application of this technique to the downstream processing of biotechnological products requires some specific changes to meet the special demands of bioproduct isolation. Production processes are set up on an multi-ton scale, for example, for the purification of fructose with both yield and purity higher than 90%. Examples for other mono- and oligosaccharides are reported. In the purification of fatty acids or fat soluble vitamins, SMB technology under supercritical fluid conditions gives additional benefits and increases the productivity by a factor of four when a pressure gradient is applied. Another field of operation is the isolation of drug compounds from natural sources where different batch- and SMB-chromatographic steps could be successfully combined. First examples are reported for cyclosporine A and paclitaxel isolation. Finally, step-gradient elution modes can be used continuously, as demonstrated for the isolation of monoclonal antibodies.
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    URL: http://dx.doi.org/10.1002/abio.370200102
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    Masthead (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996) 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320120301
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  • 45
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    Current awareness on yeast (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 299-306 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320120302
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  • 46
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    Pyruvate decarboxylase: An indispensable enzyme for growth of Saccharomyces cerevisiae on glucose (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 247-257 
    Details
    ISSN: 0749-503X
    Keywords: pyruvate decarboxylase ; sugar metabolism ; Saccharomyces cerevisiae ; metabolic compartmentation ; acetyl-CoA ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: In Saccharomyces cerevisiae, the structural genes PDC1, PDC5 and PDC6 each encode an active pyruvate decarboxylase. Replacement mutations in these genes were introduced in a homothallic wild-type strain, using the dominant marker genes APT1 and Tn5ble. A pyruvate-decarboxylase-negative (Pdc-) mutant lacking all three PDC genes exhibited a three-fold lower growth rate in complex medium with glucose than the isogenic wild-type strain. Growth in batch cultures on complex and defined media with ethanol was not impaired in Pdc- strains. Furthermore, in ethanol-limited chemostat cultures, the biomass yield of Pdc- and wild-type S. cerevisiae were identical. However, Pdc- S. cerevisiae was unable to grow in batch cultures on a defined mineral medium with glucose as the sole carbon source. When aerobic, ethanol-limited chemostat cultures (D = 0·10 h-1) were switched to a feed containing glucose as the sole carbon source, growth ceased after approximately 4 h and, consequently, the cultures washed out. The mutant was, however, able to grow in chemostat cultures on mixtures of glucose and small amounts of ethanol or acetate (5% on a carbon basis). No growth was observed when such cultures were used to inoculate batch cultures on glucose. Furthermore, when the mixed-substrate cultures were switched to a feed containing glucose as the sole carbon source, wash-out occurred. It is concluded that the mitochondrial pyruvate dehydrogenase complex cannot function as the sole source of acetyl-CoA during growth of S. cerevisiae on glucose, neither in batch cultures nor in glucose-limited chemostat cultures.
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  • 47
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    Effects of a novel DNA-damaging agent on the budding yeast Saccharomyces cerevisiae cell cycle (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 349-359 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; rad9 ; mutant ; alkylating agents ; cell cycle ; checkpoints ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have investigated the effects on Saccharomyces cerevisiae of a novel antitumour agent (FCE24517 or Tallimustine) which causes selective alkylations to adenines in the minor groove of DNA. Tallimustine, added to wild-type cells for short periods, reduced the growth rate and increased the percentage of budded cells and delayed the cell cycle in the late S+G2+M phases. In the rad9Δ null mutant cells, Tallimustine treatment did not affect growth rate and the percentage of budded cells but greatly reduced cell viability compared to isogenic cells. Consistent with a role of RAD9 in inducing a transient delay in G2 phase which preserves cell viability, the potent cytotoxic effect of the drug on rad9Δ cells was alleviated by treatment with nocodazole. Tallimustine was also found to delay the resumption from G1 arrest of wild-type but not of rad9Δ cells. These data indicate that the effects of Tallimustine on cell cycle progression in yeast are mediated by the RAD9 gene product. From our data it appears that yeast could be a valuable model system to study the mode of action of this alkylating drug and of minor groove alkylators in general.
    Additional Material: 7 Ill.
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  • 48
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    Physical mapping of a centromere-proximal region of chromosome IV-l defines the placement of genes USO1, MBP1, PSA1 and SLC1 (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 411-413 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome IV ; USO1 ; INT1 ; MBP1 ; PSA1 ; SLC1 ; YLA1 ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A physical map of a 14·5 kb region close to the centromere on the left arm of chromosome IV of Saccharomyces cerevisiae is presented. This map has been constructed by restriction analysis of a clone from a YCp50 genomic library and by use of pre-existing and new sequence data from this region. The map reveals the following gene order (reading from the most centromere-distal to the most centromere-proximal locus): USO1/INT1-MBP1-PSA1-SLC1-YLA1 and defines the size of the open reading frames and intergenic regions.
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  • 49
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    Sequencing a cosmid clone of Saccharomyces cerevisiae chromosome XIV reveals 12 new open reading frames (ORFs) and an ancient duplication of six ORFs (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 391-402 
    Details
    ISSN: 0749-503X
    Keywords: yeast ; gene duplication ; ribosomal protein ; dnaJ homologue ; fork head domain ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A sequence of 31431 bp located on the left arm of chromosome (chr.) XIV from Saccharomyces cerevisiae was analysed. A total of 18 open reading frames (ORFs) could be identified. Twelve ORFs are new, two of which are most likely ribosomal protein genes, leaving ten ORFs of unknown function. Nine of the 18 ORFs show either at least 20% overall amino acid identity or significant regional homology to other S. cerevisiae ORFs. Additionally, six of these nine ORFs have homologues of similar size and the same transcriptional orientation within a stretch of 50 kb on chromosome IX. The degree of homology ranges from 90% overall identity to 23% in 375 amino acids. The homologues on chromosome IX are grouped in two blocks that are separated by relatively long ORFs. This is the first example of a multi-gene duplication in S. cerevisiae not linked to a centromere or subtelomere region. The sequence has been deposited in the EMBL data library under Accession Number X86470.
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  • 50
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    Masthead (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996) 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320120401
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    Genomic reorganization between two sibling yeast species, Saccharomyces bayanus and Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 757-764 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces bayanus ; Saccharomyces cerevisiae ; chromosomal rearrangement ; translocation ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Genomic comparison of two sibling yeast species, Saccharomyces bayanus and Saccharomyces cerevisiae, was performed by Southern blot analysis with various S. cerevisiae gene probes following electrophoretic karyotyping. Fifteen genes on chromosome IV of S. cerevisiae were examined and classified into two groups. Gene probes of CEN4 and TRP1, as well as six other genes located on the left arm of the chromosome hybridized to a 1100-kb chromosome of S. bayanus that is smaller than chromosome IV of S. cerevisiae. On the other hand, probes of seven genes located on the right arm of chromosome IV hybridized to a 1350-kb chromosome that is homeologous to chromosome IV, judging from its size. Two genes located on the left arm of chromosome II hybridized to the 1350-kb chromosome, while four genes on the right arm hybridized to the 1100-kb chromosome. These pieces of evidence indicate that chromosomes II and IV of S. cerevisiae are rearranged into 1350-kb and 1100-kb chromosomes in S. bayanus. Furthermore, it is suggested that chromosome XV is rearranged into two chromosomes (800 and 850 kb in size) in S. bayanus. The translocation points of chromosomes II and IV were delimited using S. cerevisiae prime clone membranes. The results indicated that the translocation points are located close to the FUR4 locus on chromosome II and close to the RAD57 locus on chromosome IV.
    Additional Material: 6 Ill.
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  • 52
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    Vacuolar and extracellular maturation of Saccharomyces cerevisiae proteinase A (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 823-832 
    Details
    ISSN: 0749-503X
    Keywords: aspartyl protease ; proteolytic activation ; zymogen ; yeast ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The vacuolar aspartyl protease proteinase A (PrA) of Saccharomyces cerevisiae is encoded as a preproenzyme by the PEP4 gene and transported to the vacuole via the secretory route. Upon arrival of the proenzyme proPrA to the vacuole, active mature 42 kDa PrA is generated by specific proteolysis involving the vacuolar endoprotease proteinase B (PrB). Vacuolar activation of proPrA can also take place in mutants lacking PrB activity (prb1). Here an active 43 kDa species termed pseudoPrA is formed, probably by an autocatalytic process. When the PEP4 gene is overexpressed in wild-type cells, mature PrA can be found in the growth medium. We have found that prb1 strains overexpressing PEP4 can form pseudoPrA extracellularly. N-terminal amino acid sequence determination of extracellular, as well as vacuolar pseudoPrA showed that it contains nine amino acids of the propeptide, indicating a cleavage between Phe67 and Ser68 of the preproenzyme. This cleavage site is in accordance with the known substrate preference for PrA, supporting the notion that pseudoPrA is formed by autoactivation. When a multicopy PEP4 transformant of a prb1 mutant was grown in the presence of the aspartyl protease inhibitor pepstatin A, a significant level of proPrA was found in the growth medium. Our analyses show that overexpression of PEP4 leads to the secretion of proPrA to the growth medium where the zymogen is converted to pseudoPrA or mature PrA in a manner similar to the vacuolar processing reactions. Amino acid sequencing of secreted proPrA confirmed the predicted cleavage by signal peptidase between Ala22 and Lys23 of the preproenzyme.
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    Identification of ACT4, a novel essential actin-related gene in the yeast Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 839-848 
    Details
    ISSN: 0749-503X
    Keywords: actin-related protein ; DAPI staining ; gene disruption ; chromosome X ; Saccharomyces cerevisiae ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Actin molecules are major cytoskeleton components of all eukaryotic cells. All conventional actins that have been identified so far are 374-376 amino acids in size and exhibit at least 70% amino acid sequence identity when compared with one another. In the yeast Saccharomyces cerevisiae, one conventional actin gene ACT1 and three so-called actin-related genes, ACT2, ACT3 and ACT5, have been identified. We report here the discovery of a new actin-related gene in this organism, which we have named ACT4. The deduced protein, Act4, of 449 amino acids, exhibits only 33·4%, 26·7%, 23·4% and 29·2% identity to Act1, Act2, Act3 and Act5, respectively. In contrast, it is 68·4% identical to the product of the Schizosaccharomyces pombe Act2 gene and has a similar level of identity to other Sch. pombe Act2 homologues. This places Act4 in the Arp3 family of actin-related proteins. ACT4 gene disruption and tetrad analysis demonstrate that this gene is essential for the vegetative growth of yeast cells. The act4 mutants exhibit heterogenous morphological phenotypes. We hypothesize that Act4 may have multiple roles in the cell cycle. The sequence has been deposited in the Genome Sequence Data Base under Accession Number L37111.
    Additional Material: 6 Ill.
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  • 54
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    The targeting of bacillus subtilis levansucrase in yeast is correlated to both the hydrophobicity of the signal peptide and the net charge of the N-terminus mature part (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 953-963 
    Details
    ISSN: 0749-503X
    Keywords: Heterologous gene expression ; levansucrase ; signal peptide ; B. subtilis ; S. cerevisiae ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We compared the ability of signal sequences from various Bacillus or yeast secreted proteins to direct Bacillus subtilis levansucrase into the secretion pathway of the yeast Saccharomyces cerevisiae. The efficiency of these sequences correlated with the overall hydrophobicity of their h-domain and was independent of their origin. Furthermore, the net charge of the proximal protein sequence downstream from the signal sequence contributed to the competence of the heterologous proteins to be secreted by yeast. Modification of this net charge allowed the protein to be translocated under the control of the yeast invertase signal sequence. Moreover, glycosylation of levansucrase did not modify significantly the fructosyl polymerase activity.
    Additional Material: 6 Ill.
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    Characterization of the SAC3 gene of Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 965-975 
    Details
    ISSN: 0749-503X
    Keywords: act1-1 ; SAC3 ; ConA-labelling ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A temperature-sensitive mutation (act1-1) in the essential actin gene of Saccharomyces cerevisiae can be suppressed by mutations in the SAC3 gene. A DNA fragment containing the SAC3 gene was sequenced. SAC3 codes for a 150 kDa hydrophillic protein which does not show any significant similarities with other proteins in the databases. Sac3 therefore is a novel yeast protein. A nuclear localization of Sac3 is suggested by the presence of a putative nuclear localization signal in the Sac3 sequence. A SAC3 disruption mutation was constructed. SAC3 disruption mutants were viable but grew more slowly and were larger than wild-type cells. In contrast to the sac3-1 mutation, the SAC3 disruption was not able to suppress the temperature sensitivity and the osmosensitivity of the act1-1 mutant. This demonstrates that act1-1 suppression by sac3-1 is not the result of a simple loss of SAC3 function. Furthermore, we examined the act1-1 and the sac3 mutants for defects in polarized cell growth by FITC-Concanavalin A (Con A)-labelling. The sac3 mutants showed a normal ConA-labelling pattern. In the act1-1 mutant, however, upon shift to non-permissive temperature, newly synthesized cell wall material, instead of being directed towards the bud, was deposited at discrete spots in the mother cell.
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    Current awareness on yeast (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 991-998 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121002
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    A computer filtering method to drive out tiny genes from the yeast genomeThis paper is dedicated to the memory of Angelos Kalogeropoulos who left us prematurely. (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1163-1178 
    Details
    ISSN: 0749-503X
    Keywords: Gene prediction ; correspondence analysis ; functional analysis ; Saccharomyces cerevisiae ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The authors of the first yeast chromosome sequence defined a minimum threshold requirement of 100 codons, above which an open reading frame (ORF) is retained as a putative coding sequence. However, at least 58 yeast genes shorter than 100 codons have an assigned protein function. Therefore, the yeast genome may contain other tiny but functionally important genes that are discarded from analyses by this simple filtering rule.We have established discriminant functions from the in-phase hexamer frequencies of functional genes and of simulated ORFs derived from a stationary Markov chain model. Fifty-two out of the 58 genes were recognized as coding ORFs by our discriminating method. The test was also applied to all the small ORFs (36 to 100 codons) found in the intergenic regions of published chromosomes. It retained 140 new potential tiny coding sequences, among which we identified seven new genes by similarity searches. Our method, used conjointly with similarity searches, can also highlight sequencing errors resulting from the disruption of the coding frame of longer ORFs. This method, by its ability to detect potential coding ORFs, can be a very useful tool for functional analysis.
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    The S. cerevisiae nitrogen starvation-induced Yvh1p and Ptp2p phosphatases play a role in control of sporulation (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1135-1151 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; sporulation ; phosphatase ; nitrogen metabolism ; gene regulation ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Starvation for nitrogen in the absence of a fermentable carbon source causes diploid Saccharomyces cerevisiae cells to leave vegetative growth, enter meiosis, and sporulate; the former nutritional condition also induces expression of the YVH1 gene that encodes a protein phosphatase. This correlation prompted us to determine whether the Yvh1p phosphatase was a participant in the network that controls the onset of meiosis and sporulation. We found that expression of the IME2 gene, encoding a protein kinase homologue required for meiosis- and sporulation-specific gene expression, is decreased in a yvh1 disrupted strain. We also observed a decrease, albeit a smaller one, in the expression of IME1 which encodes an activator protein required for IME2 expression. Under identical experimental conditions, expression of the MCK1 and IME4 genes (which promote sporulation but do not require Ime1p for expression) was not affected. These results demonstrate the specificity of the yvh1 disruption phenotype. They suggest that decreased steady-state levels of IME1 and IME2 mRNA were not merely the result of non-specific adverse affects on nucleic acid metabolism caused by the yvh1 disruption. Sporulation of a homozygous yvh1 disruption mutant was delayed and less efficient overall compared to an isogenic wild-type strain, a result which correlates with decreased IME1 and IME2 gene expression. We also observed that expression of the PTP2 tyrosine phosphatase gene (a negative regulator of the osmosensing MAP kinase cascade), but not the PTP1 gene (also encoding a tyrosine phosphatase) was induced by nitrogen-starvation. Although disruption of PTP2 alone did not demonstrably affect sporulation or IME2 gene expression, sporulation was decreased more in a yvh1, ptp2 double mutant than in a yvh1 single mutant; it was nearly abolished in the double mutant. These data suggest that the YVH1 and PTP2 encoded phosphatases likely participate in the control network regulating meiosis and sporulation. Expression of YVH1 and PTP2 was not affected by nitrogen source quality (asparagine compared to proline) suggesting that nitrogen starvation-induced YVH1 and PTP2 expression and sensitivity to nitrogen catabolite repression are on two different branches of the nitrogen regulatory network.
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    Masthead (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996) 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121101
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  • 60
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    Current awareness on yeast (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1179-1186 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121102
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  • 61
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    Cloning of Candida albicans SEC14 gene homologue coding for a putative essential function (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1097-1105 
    Details
    ISSN: 0749-503X
    Keywords: SEC14 ; Candida albicans ; protein secretion ; pathogenic fungi ; PI-TP ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The yeast SEC14 gene product is required for the transport of proteins from the Golgi complex. We have cloned the homologous Candida albicans SEC14 gene (CaSEC14) by functional complementation of a Saccharomyces cerevisiae thermosensitive mutant, sec14. Some putative TATA boxes have been identified in CaSEC14 and, contrary to S. cerevisiae SEC14, no introns were found in the Candida homologue. Sequence analysis revealed that CaSec14p is a 301 amino acid protein, 67% identical to S. cerevisiae and Kluyveromyces lactis Sec14p, and 61% identical to the 300 amino-terminal residues of Yarrowia lipolytica Sec14p. Hydrophatic profile analysis of CaSec14p suggests a soluble protein without transmembrane domains, as has been described for the S. cerevisiae counterpart. While it was easy to disrupt one allele of SEC14 in C. albicans, repeated attempts to disrupt the second allele were unsuccessful, thus suggesting that the gene could be essential for vegetative growth in C. albicans. The sequence has been deposited in the EMBL data library under Accession Number X81937.
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    Molecular, functional and evolutionary characterization of the gene encoding HMG-CoA reductase in the fission yeast, Schizosaccharomyces pombe (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1107-1124 
    Details
    ISSN: 0749-503X
    Keywords: HMG-CoA reductase ; endoplasmic reticulum ; molecular evolution ; Schizosaccharomyces pombe ; lovastatin ; karmellae ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The synthesis of mevalonate, a molecule required for both sterol and isoprene biosynthesis in eukaryotes, is catalysed by 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase. Using a gene dosage approach, we have isolated the gene encoding HMG-CoA reductase, hmg1+, from the fission yeast Schizosaccharomyces pombe (Accession Number L76979). Specifically, hmg1+ was isolated on the basis of its ability to confer resistance to lovastatin, a competitive inhibitor of HMG-CoA reductase. Gene disruption analysis showed that hmg1+ was an essential gene. This result provided evidence that, unlike Saccharomyces cerevisiae, S. pombe contained only a single functional HMG-CoA reductase gene. The presence of a single HMG-CoA reductase gene was confirmed by genomic hybridization analysis. As observed for the S. cerevisiae HMG1p, the hmg1+ protein induced membrane proliferations known as karmellae. A previously undescribed ‘feed-forward’ regulation was observed in which elevated levels of HMG-CoA synthase, the enzyme catalysing the synthesis of the HMG-CoA reductase substrate, induced elevated levels of hmg1+ protein in the cell and conferred partial resistance to lovastatin.The amino acid sequences of yeast and human HMG-CoA reductase were highly divergent in the membrane domains, but were extensively conserved in the catalytic domains. We tested whether the gene duplication that produced the two functional genes in S. cerevisiae occurred before or after S. pombe and S. cerevisiae diverged by comparing the log likelihoods of trees specified by these hypotheses. We found that the tree specifying post-divergence duplication had significantly higher likelihood. Moreover, phylogenetic analyses of available HMG-CoA reductase sequences also suggested that the lineages of S. pombe and S. cerevisiae diverged approximately 420 million years ago but that the duplication event that produced two HMG-CoA reductase genes in the budding yeast occurred only approximately 56 million years ago. To date, S. pombe is the only unicellular eukaryote that has been found to contain a single HMG-CoA reductase gene. Consequently, S. pombe may provide important opportunities to study aspects of the regulation of sterol biosynthesis that have been difficult to address in other organisms and serve as a test organism to identify novel therapies for modulating cholesterol synthesis.
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    RNA-dependent RNA polymerase activity related to the 20S RNA replicon of Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1219-1228 
    Details
    ISSN: 0749-503X
    Keywords: replication ; WdsRNA ; RNA polymerase ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Saccharomyces cerevisiae contains two double-stranded RNA (dsRNA) viruses (L-A and L-BC) and two different single-stranded (ssRNA) replicons (20S RNA and 23S RNA). Replicase (dsRNA synthesis on a ssRNA template) and transcriptase (ssRNA synthesis on a dsRNA template) activities have been described for L-A and L-BC viruses, but not for 20S or 23S RNA. We report the characterization of a new in vitro RNA replicase activity in S. cerevisiae. This activity is detected after partial purification of a particulate fraction in CsCl gradients where it migrates at the density of free protein. The activity does not require the presence of L-A or L-BC viruses or 23S RNA, and its presence or absence is correlated with the presence or absence of the 20S RNA replicon. Strains lacking both this RNA polymerase activity and 20S RNA acquire this activity when they acquire 20S RNA by cytoduction (cytoplasmic mixing). This polymerase activity converts added ssRNA to dsRNA by synthesis of the complementary strand, but has no specificity for the 3′ end or internal template sequence. Although it replicates all tested RNA templates, it has a template size requirement, being unable to replicate templates larger than 1kb. The replicase makes dsRNA from a ssRNA template, but many single-stranded products due to a terminal transferase activity are also formed. These results suggest that, in contrast to the L-A and L-BC RNA polymerases, dissociation of 20S RNA polymerase from its RNA (or perhaps some cellular factor) makes the enzyme change its specificity.
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    SHM1: A multicopy suppressor of a temperature-sensitive null mutation in the HMG1-like abf2 gene (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1239-1250 
    Details
    ISSN: 0749-503X
    Keywords: HM ; ABF2 ; SHM1 ; mitochondrial carrier proteins ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: HM, an HMG1-like mitochondrial DNA-binding protein, is required for maintenance of the yeast mitochondrial genome when cells are grown in glucose. To better understand the role of HM in mitochondria, we have isolated several multicopy suppressors of the temperature-sensitive defect associated with an abf2 null mutation (lacking HM protein). One of these suppressors, SHM1, has been characterized at the molecular level and is described herein. SHM1 encodes a protein (SHM1p) that shares sequence similarity to a family of mitochondrial carrier proteins. On glycerol medium, where mitochondrial function is required for growth, shm1 deletion mutants are able to grow, whereas shm1 abf2 double mutants are severely inhibited. These results suggest that SHM1p plays an accessory role to HM in the mitochondrion. The GenBank Accession Number for the SHM1 sequence is U08352.
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    N-glycosylation affects endoplasmic reticulum degradation of a mutated derivative of carboxypeptidase yscY in yeast (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1229-1238 
    Details
    ISSN: 0749-503X
    Keywords: alpha1,2-mannosidase ; calnexin ; endoplasmic reticulum ; degradation ; glycosylation ; yeast ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The endoplasmic reticulum (ER) of eukaryotic cells contains a quality control system, that is required for the proteolytic removal of aberrantly folded proteins that accumulate in this organelle. We used genetic and biochemical methods to analyse the involvement of N-glycosylation in the degradation of a mutant derivative of carboxypeptidase yscY in the ER of the yeast Saccharomyces cerevisiae. Our results demonstrate that N-glycosylation of this protein is required for its degradation since an unglycosylated species is retained stably in the ER. Cells that were devoid of the ER-processing α1,2-mannosidase showed reduced degradation of the glycosylated substrate protein. Disruption of CNE1, a gene encoding a putative yeast homologue for calnexin, did not exhibit any effects on the degradation of this substrate protein in vivo. Also, the α1,2-mannosidase-dependent reduction in the degradation rate did not show any correlation with the function of the CNE1 gene product. Our results suggest that the ER of yeast contains a glycosylation-dependent quality control system, as has been shown for higher eukaryotic cells.
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    Functional conservation of cytosolic proteins required for endosomal vesicle fusion (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1251-1262 
    Details
    ISSN: 0749-503X
    Keywords: yeast ; Sec18 ; endocytosis ; NEM ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Recent studies suggest that intracellular membrane traffic relies upon families of related proteins which confer specificity to individual transport reactions but which operate in tandem with a ubiquitous fusogenic complex containing the N-ethylmaleimide-sensitive fusion protein (NSF). The extent to which components of this process are functionally conserved is apparent from the finding that yeast Sec18 protein (Sec18p) can substitute for mammalian NSF in intra-Golgi transport reactions. Here we report that yeast cytosol can support mammalian endosomal vesicle fusion, demonstrating conservation of cytosolic components required for this reaction. Furthermore, under conditions in which the fusion reaction is NSF-dependent we show that yeast Sec18p can functionally substitute for NSF, showing that the yeast protein is capable of catalysing at least two distinct mammalian membrane fusion events. In addition we exploit the complex pattern of sensitivity of the mammalian reaction to N-ethylmaleimide (NEM), coupled with the use of yeast cytosol, to dissect a number of factors required for fusion. We reveal at least three novel NEM-sensitive activities. One of these can be restored by yeast cytosol suggesting that it is functionally conserved.
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    Mapping of gene controlling thiamine transport in Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1279-1283 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; thiamine transport ; recessive allele ; chromosome VII ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A recessive mutation leading to complete loss of thiamine uptake in Saccharomyces cerevisiae was mapped on the left arm of chromosome VII, approximately 56cM centromere-distal to trp5. As the analysed locus is relatively distant from its centromere and from the markers used, its attachment to chromosome VII was confirmed by chromosome loss methods.
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    The sequence of a 23·4kb segment on the right arm of chromosome VII from Saccharomyces cerevisiae reveals CLB6, SPT6, RP28A and NUP57 genes, a ty3 element and 11 new open reading frames (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1273-1277 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; right arm of chromosome VII ; cosmid clone pEGH054 ; CLB6 ; SPT6 ; RP28A ; NUP57 ; Ty element ; autonomous replicating sequence ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The DNA sequence of 23427bp from the right arm of chromosome VII of Saccharomyces cerevisiae is reported. The sequence contains 18 open reading frames (ORFs). Four of these are identical to genes already known. G5970 corresponds to the CLB6 gene. G6169 is identical to the SPT6 gene. G6178 represents the RPS28A gene and G6320 corresponds to the 3′-region from the NUP57 gene. Four ORFs (G5978, G5982, G5984, G5995) belong to a Ty3-1 element. A further ORF (G5975) encodes a tRNAcys. The other ORFs revealed no significant similarity to any known gene.The DNA and protein sequences have been deposited in the EMBL Data bank. They are available under the following accession numbers: ORF G 5970, G 5975, G 5978, G 5982, G 5984, G 5995, G 5999, G 6140, G 6145, G 6150, G 6153, G 6163, G 6166, G 6169, G 6172, G 6178, G 6320; DNA sequence accession Z72894/ X70436/ X72890, M34549,  - , Z72895, Z72896, Z72897, Z72898, Z72899, Z72899, Z72899/ M34391, Z72902, Z72903/ M96570, Z72904/ X83099/ X81155; Protein sequence accession S64417/ S43736, S41736,  - , S64417, S64419, S64420, S64421, S64422, S64423, S64423/ A36468, S64425, S64426/ A46703, S64428 /S51799/ S55976.
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    Cloning of the Penicillium minioluteum gene encoding dextranase and its expression in Pichia pastoris (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1187-1200 
    Details
    ISSN: 0749-503X
    Keywords: dextranase ; Penicillium minioluteum ; Pichia pastoris ; heterologous gene expression ; protein secretion ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The DEX gene encoding an extracellular dextranase was isolated from the genomic DNA library of Penicillium minioluteum by hybridization using the dextranase cDNA as a probe. Comparison of the gene and cDNA sequences revealed that the DEX gene does not contain introns. Amino acid sequences comparison of P. minioluteum dextranase with other reported dextranases reveals a significant homology (29% identity) with a dextranase from Arthrobacter sp. CB-8. The DEX gene fragment encoding a mature protein of 574 amino acids was expressed in the methylotrophic yeast Pichia pastoris by using the SUC2 gene signal sequence from Saccharomyces cerevisiae under control of the alcohol oxidase-1 (AOX1) promoter. Over 3·2g/l of enzymatically active dextranase was secreted into the medium after induction by methanol. The yeast product was indistinguishable from the native enzyme in specific activity and the N-terminus of both proteins were identical.
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    Mutations in an Abf1p binding site in the promoter of yeast RPO26 shift the transcription start sites and reduce the level of RPO26 mRNA (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1339-1350 
    Details
    ISSN: 0749-503X
    Keywords: RPO26 ; ABF1 ; transcription initiation ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A binding site for the transcription factor Abf1p was identified as an important promoter element of the gene that encodes Rpo26, a subunit common to all three yeast nuclear RNA polymerases (RNAP). Mutations in the Abf1p binding site were identified among a pool of rpo26 mutant alleles that confer synthetic lethality in combination with a temperature-sensitive mutation (rpo21-4) in the gene that encodes the largest subunit of RNAPII (Rpo21p). In the presence of the wild-type allele of RPO21 these rpo26 promoter mutations confer a cold-sensitive growth defect. Electrophoretic mobility-shift assays using purified Abf1p demonstrated that Abf1p binds to the RPO26 promoter and that the promoter mutations abolish this binding in vitro. Quantitation of the amount of RPO26 mRNA showed that mutations in the Abf1p binding site reduce the expression of RPO26 by approximately 60%. Mutations that affect Abf1p binding also result in a shift of the RPO26 transcriptional start sites to positions further upstream than normal. These results suggest that binding of the Abf1p transcription factor to the RPO26 promoter is important not only in establishing the level of transcription for this gene, but also in positioning the initiation sites of transcription.
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    Current awareness on yeast (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1385-1392 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121302
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    Sequence of a 39 411 bp DNA fragment covering the left end of chromosome VII of Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1555-1562 
    Details
    ISSN: 0749-503X
    Keywords: chromosome sequencing ; Saccharomyces cerevisiae ; ADH4 ; FZF1 ; HKB ; RTG2 ; HFM1 ; PDE1 ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have sequenced a DNA fragment of 39 411 bp which includes part of the left telomere of chromosome VII of Saccharomyces cerevisiae. We have identified 19 open reading frames (ORFs); six correspond to known yeast genes (ADH4, FZF1, HKB, RTG2, HFM1 and PDE1), nine have similarity with other genes and four exhibit no significant similarity with any known gene. The average size of these ORFs seems to be related to their location, the eight ORFs nearest the telomere being shorter than the 11 others. These two groups of genes are separated by a region of 4·5 kb devoid of significant ORFs. One ORF, NRF120, is a new member of the seripauperine family, represented once in all sequenced yeast chromosomes, in a subtelomeric location. This sequence has been entered in the EMBL data library under accession number X94357.
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    Analysis of a 22 956 bp region on the right arm of Saccharomyces cerevisiae chromosome XV (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1563-1573 
    Details
    ISSN: 0749-503X
    Keywords: genome sequencing ; Saccharomyces cerevisiae ; chromosome XV ; ORFs ; predictable functions ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We present here the sequence analysis of a DNA fragment (cosmid pUOA1258) located on the right arm of chromosome XV. The 22 956 bp sequence reveals 14 open reading frames (ORFs) longer than 300 bp and the 201 bp RPS33 gene. Among the 14 large ORFs, two overlapping frames are likely to be non-expressed and one corresponds to the known GLN4 gene encoding glutaminyl-tRNA synthetase. Two ORFs, O3571 and O3620, encode putative transcriptional regulators with a Zn(2)-Cys(6) DNA binding domain characteristic of members of the GAL4 family. Among the nine remaining ORFs, five (O3568, O3575, O3590, O3615 and O3625) present significant similarity to proteins of unknown function and four (O3580, O3595, O3630 and O3635) lack homology to sequences present in the databases screened. This sequence has been deposited in the GenBank database under Accession Number U55021.
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    Analysis of a 23 kb region on the left arm of yeast chromosome IV (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1587-1592 
    Details
    ISSN: 0749-503X
    Keywords: genome sequencing ; chromosome IV ; Saccharomyces cerevisiae ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have determined the complete nucleotide sequence of a 23 kb segment from the left arm of chromosome IV, which is carried by the cosmid 1L10. This sequence contains the 3′ coding region of the STE7 and RET1 (COP1) genes, and 13 complete open reading frames longer than 300 bp, of which ten correspond to putative new genes and three (CLB3, MSH5 and RPC53) have been sequenced previously. The sequence from cosmid 1L10 was obtained entirely by a combined subcloning and walking primer strategy.
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    Sequence and analysis of a 26·9 kb fragment from chromosome XV of the yeast Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1575-1586 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome sequencing ; chromosome XV ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have determined the nucleotide sequence of a fragment of chromosome XV of Saccharomyces cerevisiae cloned into cosmid pEOA048. The analysis of the 26 857 bp sequence reveals the presence of 19 open reading frames (ORFs), and of one RNA-coding gene (SNR17A). Six ORFs correspond to previously known genes (MKK1/SSP32, YGE1/GRPE/MGE1, KIN4/KIN31/KIN3, RPL37B, DFR1 and HES1, respectively), all others were discovered in this work.Only five of the new ORFs have significant homologs in public databases, the remaining eight correspond to orphans (two of them are questionable). O5248 is a probable folylpolyglutamate synthetase, having two structural homologs already sequenced in the yeast genome. O5273 shows homology with a yeast protein required for vanadate resistance. O5268 shows homology with putative oxidoreductases of different organisms. O5257 shows homology with the SAS2 protein and another hypothetical protein from yeast. The last one, O5245, shows homology with a putative protein of Caenorhabditis elegans of unknown function. The present sequence corresponds to coordinates 772 331 to 799 187 of the entire chromosome XV sequence which can be retrieved by anonymous ftp (ftp. mips. embnet. org).
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    Masthead (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996) 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121501
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    Current awareness on yeast (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1593-1600 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121502
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    Identification of proteins of the yeast protein map using genetically manipulated strains and peptide-mass fingerprinting (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1519-1533 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces ; yeast protein map ; protein identification ; mass spectrometry ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: In this study we used genetically manipulated strains in order to identify polypeptide spots of the protein map of Saccharomyces cerevisiae. Thirty-two novel polypeptide spots were identified using this strategy. They corresponded to the product of 23 different genes. We also explored the possibilities of using peptide-mass fingerprinting for the identification of proteins separated on our gels. According to this strategy, proteins contained in spots are digested with trypsin and the masses of generated peptides are determined by matrix-assisted laser desorption-ionization mass spectrometry (MALDI-MS). The peptide masses are then used to search a yeast protein database for proteins that match the experimental data. Application of this strategy to previously identified polypeptide spots gave evidence of the feasibility of this approach. We also report predictions on the identities of nine unknown spots using MALDI-MS.
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    A novel cell wall protein specific to the mycelial form of Yarrowia lipolytica (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1535-1548 
    Details
    ISSN: 0749-503X
    Keywords: Yarrowia lipolytica ; cell wall ; mycelium ; cDNA ; YWP1 ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A cDNA clone specifying a cell wall protein was isolated from a Yarrowia lipolytica cDNA library. The cDNA library was constructed in the expression vector λgt11, with the RNA isolated from actively growing mycelial cells. The deduced amino acid sequence shows that the encoded protein contains an N-terminal hydrophobic signal peptide. We have designated this protein YWP1 for Yarrowia lipolytica cell Wall Protein. Northern hybridization identified YWP1 transcript only when Y. lipolytica was growing in the mycelial form. The encoded protein seems to be covalently bound to the glucan cell wall since it is not released from the cell walls by sodium dodecyl sulphate extraction, but it is solubilized following partial degradation of β-glucan by Zymolyase digestion. The protein is localized in the outer surface on the tip of the growing mycelial cells and is found partially cryptic in sub-apical locations, suggesting that it participates directly in the mycelial wall architecture.
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    Publisher's note (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1601-1601 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121602
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    Masthead (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996) 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121601
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    List of referees (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1602-1602 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121603
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    The DNA sequence of cosmid 14-5 from chromosome XIV reveals 21 open reading frames including a novel gene encoding a globin-like domain (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1071-1076 
    Details
    ISSN: 0749-503X
    Keywords: yeast ; genome sequencing ; SLA2 ; ZWF1 ; BLH1 ; KEX2 ; SIN4 ; URE2 ; globin ; DnaJ/kw ; zinc-finger ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: In this paper is described the DNA sequence of cosmid 14-5 from chromosome XIV of Saccharomyces cerevisiae. The sequence is 38 855 bases long and contains 21 open reading frames (ORFs) plus three internal ORFs. Six ORFs correspond to known yeast genes (SLA2, ZWF1, BLH1, KEX2, SIN4 and URE2); two other ORFs had already been sequenced because they are adjacent to known genes; the remaining 12 ORFs are novel genes. Of these, one ORF (N1142) is particularly interesting since it shows a significant similarity to mammalian globin. Another ORF (N1254) displays two zinc finger motifs as well as a DNAJ motif. The cosmid sequence has been submitted to the EMBL data library under Accession Number Z69381.
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    The sequence of a 20·3 kb DNA fragment from the left arm of Saccharomyces cerevisiae chromosome IV contains the KIN28, MSS2, PHO2, POL3 and DUN1 genes, and six new open reading frames (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1077-1084 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; genome sequencing ; chromosome IV ; KIN28 ; MSS2 ; PHO2 ; POL3 ; DUN1 ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We report the sequence of a 20 300 bp DNA fragment from the left arm of Saccharomyces cerevisiae chromosome IV. This segment contains 13 complete open reading frames (ORFs) and part of another ORF, altogether covering 84·2% of the entire sequence, five of which correspond to the previously characterized KIN28, MSS2, PHO2, POL3/CDC2 and DUN1 genes. One putative protein, D2358p, shares considerable homology with an O-sialoglycoprotein endopeptidase from Pasteurella haemolytica serotype A1. The putative product of D2325 contains the characteristic consensus motif of triacylglycerol lipases. D2320p and D2352p have a putative ‘leucine-zipper’ structure and a RNA-binding region Rnp-1 signature, respectively. The sequence data have been submitted to EMBL data library under Accession Number X95644.
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    The sequence of a 30 kb fragment on the left arm of chromosome XV from Saccharomyces cerevisiae reveals 15 open reading frames, five of which correspond to previously identified genes (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1091-1095 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome XV ; genome sequencing ; PHO80 ; TIR2 ; SLG1 ; ATP-dependent permease ; subtilisin-like protease III ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We report the sequence of a 30 469 bp long DNA fragment on the left arm of chromosome XV of Saccharomyces cerevisiae. The fragment contains 15 open reading frames (ORFs) of at least 300 bp. Five previously sequenced yeast genes, PHO80, TIR2, SLG1, the gene encoding the subtilisin-like protease III precursor and the gene coding for ATP-dependent permease, are found among these ORFs. By DNA sequence comparison, two ORFs identified previously reported expressed sequence tags from yeast. Of the proteins encoded by the remaining eight ORFs, six show similarities to proteins from different organisms and two lack detectable similarity with any amino acid sequence described in public data banks. The DNA sequence has been deposited in GenBank under Accession Number U43491.
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  • 86
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    Sequencing and analysis of a 35·4 kb region on the left arm of chromosome IV from Saccharomyces cerevisiae reveal 23 open reading frames (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1085-1090 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome IV ; SNQ2 ; SES1 ; GCV1 ; RPL2B ; HEX2/SRN1 ; RPS18A ; tRNA-Val12a ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The complete DNA sequence of cosmid clone 31A5 containing a 35 452 bp segment from the left arm of chromosome IV from Saccharomyces cerevisiae, was determined from an ordered set of subclones in combination with primer walking on the cosmid. The sequence contains 23 open reading frames (ORFs) of more than 100 amino acid residues and the tRNA-Val2a gene. Five ORFs corresponded to the known yeast genes SNQ2, SES1, GCV1, RPL2B and RPS18A. The DNA sequence for RPS18A is interrupted by an intron. One ORF corresponded to a part of the yeast gene HEX2 at the end of the cosmid insert. Four ORFs encoded putative proteins which showed strong homologies to other previously known proteins, three of yeast origin and one of non-yeast origin. Two ORFs were classified as having borderline homologies: one had similarity to two protein families and another to two protein products of unknown function from other species. The remaining 11 ORFs bore no significant similarity to any published protein. The complete DNA sequence has been submitted to the EMBL data library, Accession Number X95966.
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  • 87
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    Sequence of 29 kb around the PDR10 locus on the right arm of Saccharomyces cerevisiae chromosome XV: Similarity to part of chromosome I (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 999-1004 
    Details
    ISSN: 0749-503X
    Keywords: MYO2 ; SNC2 ; PDR10 ; SCD5 ; FTB1 ; MIP1 ; VMA4 ; MRS2 ; ALA1 ; KRE5 ; TEA1 ; YAL034c ; duplicate chromosomal region ; ABC transporter ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We report a 29,445 bp sequence from the right arm of yeast chromosome XV. It contains the genes MYO2, SNC2, PDR10, SCD5 (also called FTB1), MIP1, VMA4, MRS2, ALA1, KRE5, TEA1, and a homologue of YAL034c. Several discrepancies with previously published sequences were found. PDR10 encodes a protein highly similar to the pleiotropic drug resistance protein Pdr5p. This sequence contig forms part of a region of extended similarity to part of the left arm of chromosome I, which is a relic of an ancient duplicated chromosomal region.
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  • 88
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    Sequencing analysis of a 4·1 kb subtelomeric region from yeast chromosome IV identifies HXT15, a new member of the hexose transporter familyM.B. and D.S. contributed equally to his paper. (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1005-1011 
    Details
    ISSN: 0749-503X
    Keywords: genome sequencing ; Saccharomyces cerevisiae ; yeast ; chromosome IV ; HXT15 ; hexose transporter ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The DNA sequence of a 4·1 kb region of Saccharomyces cerevisiae chromosome IV was determined. This region contains a single open reading frame which codes for a member of the hexose transporter family. This new gene has been named HXT15 according to yeast gene data bases. The sequence has been entered in the EMBL data library under Accession Number X92891.
    Additional Material: 4 Ill.
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  • 89
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    Sequencing of a 35·71 kb DNA segment on the right arm of yeast chromosome XV reveals regions of similarity to chromosomes I and XIIIMS dedicates this paper to the memory of his friend and colleague Angelos Kalogeropoulos who died on April 19th 1996. (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1021-1031 
    Details
    ISSN: 0749-503X
    Keywords: SLY41 ; SPS4 ; COT1 ; FAA1 ; PMT3 ; PRO2 ; MYO2 ; EST sequence ; intron-containing ORFs ; transmembrane domains ; RNA-binding domains ; duplicated chromosomal region ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: In a shotgun approach we sequenced the cosmid pEOA284 containing a fragment derived from the right arm of chromosome XV of Saccharomyces cerevisiae. An analysis of the sequence revealed that it contained open reading frames (ORFs) corresponding to the known genes SLY41, SPS4, COT1, FAA1, PMT3, PRO2 and MYO2. Of the 18 unknown ORFs, five are contained totally within, and two, O6105 and O6163, partially overlap other ORFs. ORF O6116 and O6139 have putative introns. Regions of similarity with chromosomes I and XIII have been uncovered. Interestingly, most of the paired ORFs encode proteins of the same gene family. The relatedness of these ORFs suggests gene duplication. The sequence has been entered into the public data libraries under Accession Number X90565.
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  • 90
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    Sequence analysis of a 13·4 kbp fragment from the left arm of chromosome XV reveals a malate dehydrogenase gene, a putative Ser/Thr protein kinase, the ribosomal L25 gene and four new open reading frames (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1013-1020 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome XV ; MDH2 gene ; Ser/Thr protein kinases ; ribosomal genes ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A 13 421 bp fragment located near the left telomere of chromosome XV (cosmid pEOA461) has been sequenced. Seven non-overlapping open reading frames (ORFs) encoding polypeptides longer than 100 residues have been found (AOB859, AOC184, AOE375, AOX142i, AOE423, AOA476 and AOE433). An additional ORF (AOE131) is found within AOA476. Three of them (AOC184, AOA476 and AOE433) show no remarkable identity with proteins deposited in the data banks. ORF AOB859 is quite similar to a hypothetical yeast protein of similar size located in chromosome VI, particularly within the C-terminal half. AOE375 encodes a new member of the glycogen synthase kinase-3 subfamily of Ser/Thr protein kinases. AOX142i is the gene encoding the previously described ribosomal protein L25. AOE423 codes for a protein virtually identical to the MDH2 malate dehydrogenase isozyme. However, our DNA sequence shows a single one-base insertion upstream of the reported initiating codon. This would produce a larger ORF by extending 46 residues the N-terminus of the protein. The existence of this insertion has been confirmed in three different yeast strains, including FY1679. The complete nucleotide sequence of the 13·4 kbp fragment has been deposited at the DNA databases (Accession Number U41293).
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  • 91
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    DNA sequence analysis of a 10 624 bp fragment of the left arm of chromosome XV from Saccharomyces cerevisiae reveals a RNA binding protein, a mitochondrial protein, two ribosomal proteins and two new open reading frames (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1041-1045 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome XV ; ribosomal proteins ; RNA binding protein ; mitochondrial protein ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have determined the sequence of a 10 624 bp DNA segment located in the left arm of chromosome XV of Saccharomyces cerevisiae. The sequence contains eight open reading frames (ORFs) longer than 100 amino acids. Two of them do not present significant homology with sequences found in the databases. The product of ORF o0553 is identical to the protein encoded by the gene SMF1. Internal to it there is another ORF, o0555 that is apparently expressed. The proteins encoded by ORFs o0559 and o0565 are identical to ribosomal proteins S19.e and L18 respectively. ORF o0550 encodes a protein with an RNA binding signature including RNP motifs and stretches rich in asparagine, glutamine and arginine. The nucleotide sequence determined has been deposited in the EMBL data library under Accession Number X95258.
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  • 92
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    A putative helicase, the SUA5, PMR1, tRNALys1 genes and four open reading frames have been detected in the DNA sequence of an 8·8 kb fragment of the left arm of chromosome VII of Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1033-1040 
    Details
    ISSN: 0749-503X
    Keywords: genome sequencing ; Saccharomyces cerevisiae ; chromosome VII ; ROK1 ; PMR1 ; SUA5 ; tRNALys1 ; ATP-dependent RNA helicase ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We report the sequence of an 8·8 kb segment of DNA from the left arm of chromosome VII of Saccharomyces cerevisiae. The sequence reveals seven open reading frames (ORFs) G1651, G1654, G1660, G1663, G1666, G1667 and G1669 greater than 100 amino acids in length and the tRNALys1 gene. ORF G1651 shows 100% identity with the ROK1 protein which is a putative RNA helicase of the ‘DEAD box’ protein family. ORF G1654 exhibits a motif highly conserved in ATP/GTP binding proteins generally referred to as ‘P-loop’. From FastA analysis, G1660 and G1666 were found to be previously sequenced genes, respectively SUA5 and PMR1. The three other ORFs identified are partially (G1663) or completely (G1667 and G1669) overlapping with the PMR1 sequence on the complementary strand. This feature, together with their low codon adaptation indexes and the absence of significant homology with known proteins suggest that they do not correspond to real genes. The nucleotide sequence of the 8·8 kb fragment is available through the EMBL data library under the Accession Number X85757.
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  • 93
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    Identification of a putative methylenetetrahydrofolate reductase by sequence analysis of a 6·8 kb DNA fragment of yeast chromosome VII (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1047-1051 
    Details
    ISSN: 0749-503X
    Keywords: genome sequencing ; Saccharomyces cerevisiae ; chromosome VII ; methylenetetrahydrofolate reductase ; SCS3 ; SUP44 ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We report the sequence analysis of a 6·8 kb DNA fragment from Saccharomyces cerevisiae chromosome VII. This sequence contains five open reading frames (ORFs) greater than 100 amino acids. There is also an incomplete ORF flanking one of the extremes, G2868, which is the 3′ end of the SCS3 gene (Hosaka et al., 1994). The translated sequence of ORF G2882 shows similarity to the human methylenetetrahydrofolate reductase (Goyette et al., 1994). ORF G2889 shows no significant homologies with the sequences compiled in databases. ORF G2893 corresponds to the gene SUP44, coding for the yeast ribosomal protein S4 (All-Robin et al., 1990). G2873 and G2896 are internal ORFs. The whole sequence of the fragment is available at the EMBL nucleotide sequence database, GenBank and Data Bank of Japan under the Accession Number X94106.
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  • 94
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    Sequence analysis of a 12 801 bp fragment of the left arm of yeast chromosome XV containing a putative 6-phosphofructo-2-kinase gene, a gene for a possible glycophospholipid-anchored surface protein and six other open reading frames (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1053-1058 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome XV ; 6-phosphofructo-2-kinase ; glycophospholipid-anchored surface protein ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The DNA sequence of a 12,801 bp fragment located near the left telomere of chromosome XV has been determined. Sequence analysis reveals eight open reading frames (ORFs) encoding polypeptides larger than 100 residues. ORFs AOE129 and AOAA121 are in opposite strands and they overlap at their 3′ ends. AOE397 has similarity with phosphofructokinase genes from other organisms and may code for a second 6-phosphofructo-2-kinase of Saccharomyces cerevisiae. Sequence of AOA471 shows significant similarity with yeast genes coding for glycophospholipid-containing proteins. AOD1341 would code for a 1341 amino acids long protein with a predicted ATP/GTP-binding site and a transmembrane domain. The nucleotide sequence reported here has been submitted to the EMBL data library under Accession Number X95465.
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  • 95
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    Masthead (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996) 
    Details
    ISSN: 0749-503X
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320121101
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  • 96
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    DNA sequence analysis of the VPH1-SNF2 region on chromosome XV of Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1059-1064 
    Details
    ISSN: 0749-503X
    Keywords: yeast ; Saccharomyces cerevisiae ; chromosone XV ; DNA ; VPH1 ; PAC1 ; MOD5 ; CAP20 ; ORF1 ; SNF2 ; DFR1 ; DHFR ; heat shock protein ; protein disulfite isomerase ; tRNA-ala ; sigma ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The nucleotide sequence of a 37 000 base pair region from the left arm of chromosome XV of Saccharomyces cerevisiae has been determined and analysed. This region contains 21 open reading frames (ORFs) coding for proteins of more than 100 amino acids. Six ORFs correspond to the genes PAC1, VPH1, MOD5, CAP20, ORF1 and SNF2 already described. Eight ORFs show some similarities to known genes from yeast and other organisms. They include genes coding for serine/threonine protein kinases, a multidrug resistance family homologue, a protein related to dihydrofolate reductase, a cluster of heat shock-like proteins and a gene coding for an enzyme related to protein disulfide isomerase. Finally seven ORFs do not show any similarities with a known gene. In addition we found a new ala-tRNA (UGC) gene located next to a sigma sequence. The sequence has been deposited in the EMBL databank under Accession Number X89633.
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  • 97
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    The sequence of 23 kb surrounding the SNF3 locus on the left arm of yeast chromosome IV reveals the location of five known genes and characterizes at least six new open reading frames including putative genes for ribosomal protein L35 and a sugar transport protein (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1065-1070 
    Details
    ISSN: 0749-503X
    Keywords: MGT1 ; SHM1 ; ASF2 ; WEB1 ; SNF3 ; ARF1 ; L35 ribosomal protein ; sugar transport protein ; Saccharomyces carlsbergensis, sake, diastaticus ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The nucleotide sequence of 22,846 bp of the left arm of chromosome IV is described. Twelve open reading frames (ORFs) greater than 100 triplets were detected, one of which extends into an adjacent cosmid. Two of the ORFs may contain an intron. One of these is an L35 ribosomal protein gene. Five ORFs (D1204, D1214, D1219, D1234 and D1244) encode previously sequenced genes (MGT1, SHM1, ASF2, SNF3 and ARF2, respectively). The nucleotide sequence of a sixth ORF (D1229) is quite similar to the WEB1 gene, which appeared in the DNA databases shortly after finishing the sequence reported here. It is not clear whether or not WEB1 and D1229 represent one and the same gene. The co-linearity of the reported DNA sequences with the genome of strains from Saccharomyces cerevisiae subspecies carlsbergensis, sake and diastaticus was assessed by comparative PCR with overlapping primer sets. The nucleotide sequence data reported in this paper will appear in the EMBL, GenBank and DDBJ Nucleotide Sequence Databases under Accession Number X83276. © 1996 John Wiley & Sons, Ltd.
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  • 98
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    Sequence analysis of a 14·2 kb fragment of Saccharomyces cerevisiae chromosome XIV that includes the ypt53, tRNALeu and gsr m2 genes and four new open reading frames (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 599-608 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome XIV ; ypt53 ; tRNALeu ; gsr m2 ; S7 RPR ; transmembrane protein ; norA ; glutamic acid rich protein ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: As part of the EU yeast genome program, a fragment of 14 262 bp from the left arm of Saccharomyces cerevisiae chromosome XIV has been sequenced. This fragment corresponds to cosmid 14-14b and is located roughly 130 kb from the centromere. It contains four new open reading frames which encode potential proteins of more than 99 amino acids, as well as the ypt53, tRNALeu and gsr m2 genes. The putative protein N2212 is similar to the ribosomal protein S7 from humans. N2215 contains several predicted transmembrane elements. N2231 contains regions which are rich in acidic, as well as basic, residues which could form α-helical structures. Similar regions are found in a variety of proteins including glutamic acid rich protein, trichohyalin, caldesmon, Tb-29 and several cytoskeleton-interacting proteins. The sequence has been entered in the EMBL data library under Accession Number X85811.
    Additional Material: 6 Ill.
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  • 99
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    Isolation and characterization of Schizosaccharomyces pombe fragile mutants (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 555-564 
    Details
    ISSN: 0749-503X
    Keywords: Schizosaccharomyces pombe ; fragile mutants ; cell wall structure ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Three Schizosaccharomyces pombe fragile mutants requiring the presence of an osmotic stabilizer to grow, that lyse when transferred into hypotonic solutions and that secrete to the extracellular medium more protein than the parental strain were isolated. In the three mutants, the fragile phenotype segregated in a Mendelian fashion, indicating a single chromosomal gene mutation, and behaved as a recessive character. By complementation analysis, the three fragile mutants fell in a single complementation group, defining the same gene (SRB1). Mutations of this gene are responsible for alterations in the cells such as fragile character, increase in the cell wall porosity, changes in the cell morphology and floc-forming ability. The study of the three srb1 alleles indicated that the degree of these alterations is proportional to a significant decrease in the galactomannan fraction of the mutants cell wall. The data presented in this report suggest that the product of the SRB1 gene is critical for the maintenance of the integrity and structure of Sz. pombe cell wall.
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  • 100
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    ERG1, encoding squalene epoxidase, is located on the right arm of chromosome VII of Saccharomyces cerevisiae (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 609-613 
    Details
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; ERG1 ; squalene epoxidase ; chromosome VII ; sterol biosynthesis ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The ERG1 gene of Saccharomyces cerevisiae encodes squalene epoxidase, a key enzyme in the ergosterol pathway. ERG1 is an essential gene. Disruption of the gene with URA3 results in a lethal phenotype when cells are grown under aerobic conditions, even in the presence of ergosterol. However, cells are viable in the presence of ergosterol under anaerobic growth conditions during which ergosterol is taken up by cells. Physical and genetic mapping data reveal that ERG1 is located on the right arm of chromosome VII proximal to QCR9 at a distance of 14·6 cM from ADE3.
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