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  • 1
    Electronic Resource
    Electronic Resource
    Metabolism of 2-hydroxyphenylglyoxylate by Moraxella sp. strain VS1 (1991)
    Springer
    Archives of microbiology 156 (1991), S. 213-217 
    Details
    ISSN: 1432-072X
    Keywords: 2-Hydroxyphenylglyoxylate ; Degradation ; Gentisate pathway ; Moraxella sp. VS1
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A bacterium, designated as Moraxella sp., was enriched with 2-hydroxyphenylglyoxylate (2HPGA) as sole source of carbon and energy. Identified metabolites and enzyme activities determined with whole cells and extracts indicated that 2HPGA was degraded by an inducible sequence of enzymes via salicylaldehyde, salicylate, and gentisate; only minute amounts of salicylate were converted to catechol. Further evidence was obtained that permeases were necessary for the uptake of most aromatic compounds utilized for growth. For the direct determination of 2HPGA decarboxylase activity, an enzyme assay involving high-performance liquid chromatography for quantitation of the substrate was developped to study the initial step of the degradative pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00249117
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  • 2
    Electronic Resource
    Electronic Resource
    Bacterial degradation of 3- and 4-carboxybiphenyl ether by Psuedomonas sp. NSS2 (1990)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 67 (1990), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The Pseudomonas sp. strain NSS2 capable to grow with 3- and 4-carboxybiphenyl ether (CBPE) as only carbon source was isolated from soil samples, phenol and protocatechuate were trasiently excerted into the culture medium. Identification of both catabolotes gives evidence for the oxygenolytic cleavase of the ether bond.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1990.tb13854.x
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  • 3
    Electronic Resource
    Electronic Resource
    Transformation of 3-chlorodibenzofuran by Pseudomonas sp. HH69 (1991)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 81 (1991), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract: The dibenzofuran-degrading bacterial strain Pseudomonas sp. HH69 showed high oxidative activity towards 3-chlorodibenzofuran (3CDF). During the co-metabolic turnover of 3CDF large amounts of 4-chlorosalicylate and temporarily small amounts of salicylate were excreted. Simultaneously a yellow colour appeared due to the excretion of two polar products. Conversion of 3CDF by a mutant, derived from Pseudomonas sp. HH69 and defective in 2,3-dihydroxybiphenyl-1,2-dioxygenase led to the formation of equal quantities of 4′-chloro-2,2′,3-trihydroxybiphenyl (4′ CTHBP) and 4-chloro-2,2′,3-trihydroxybiphenyl (4CTHBP). Crude extracts of the wild type transformed 4′ CTHBP to 4-chlorosalicylate, whilst 4CTHBP was transformed to salicylate. Hence, we propose a non-selective initial attack on both aromatic rings of 3CDF and a degradative pathway for the resulting chlorotrihydroxybiphenyls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1991.tb04706.x
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  • 4
    Electronic Resource
    Electronic Resource
    Catabolism of 3,5-dichlorosalicylate by Pseudomonas species strain JWS (1991)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 84 (1991), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract A Pseudomonas sp. strain JWS was isolated from an enrichment culture with 3,5-dichlorosalicylate as the sole source of carbon and energy. Additionally, 3-chloro-, 5-chloro-, and 3,5-dibromosalicylate, but not 4-chlorosalicylate were mineralized by the organism. During growth on the chlorosalicylates, stoichiometric amounts of chloride were released into the culture medium. In the presence of both salicylate and 3,5-dichlorosalicylate, high activities were induced for the turnover of non-halogenated as well as halogenated salicylates. Enzyme activities assayed in crude cell extracts which are responsible for the oxidation of catechol and its halogenated derivatives as well as those for cycloisomerization of cis,cis-muconate and its 2,4-dichloro derivative provided indications for the involvement of inducible type II catechol 1,2-dioxygenase and muconate cycloisomerase in biodegradation of halogenated salicylates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1991.tb04570.x
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  • 5
    Electronic Resource
    Electronic Resource
    Cloning and characterization of heat-inducible promoters of Bacillus subtilis (1993)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 106 (1993), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Heat-inducible DNA fragments of Bacillus subtilis were cloned with two different promoter probe vectors. The increased synthesis of the reporter enzymes seemed to be due to a transient increase in the transcription of the encoding genes. The structures of the heat-sensitive promoters resembles the consensus sequence of promoters recognized by the vegetative form of RNA polymerase of B. subtilis. Our results support data in literature that the heat shock response of B. subtilis is regulated by a different mechanism than in Escherichia coli, where alternative sigma factors direct the transcription of heat shock genes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1993.tb05978.x
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  • 6
    Electronic Resource
    Electronic Resource
    Metabolism of phenylbenzoate by Pseudomonas sp. strain TR3 (1999)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 176 (1999), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A bacterial isolate, tentatively identified as Pseudomonas sp. strain TR3, was found to utilize the diaryl ester phenylbenzoate as sole source of carbon and energy. This strain has the ability to productively degrade phenylbenzoate and some substituted derivatives by a catabolic sequence which was characterized biochemically. The biodegradation of phenylbenzoate is thus initiated by an inducible esterase, effectively hydrolyzing the diaryl esters to produce stoichiometric amounts of two monoaromatic metabolites, identified as benzoate and phenol in the case of phenylbenzoate. The diaryl ester p-tolylbenzoate was hydrolyzed to yield benzoate and 4-methylphenol while 4-chlorophenylbenzoate gave rise to the production of benzoate and 4-chlorophenol. These monoaromatic catabolites were further degraded via the oxoadipate pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1999.tb13700.x
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  • 7
    Electronic Resource
    Electronic Resource
    Initial reactions in the mineralization of 2-sulfobenzoate by Pseudomonas sp. RW611 (1992)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 92 (1992), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Pseudomonas sp. strain RW611 utilized the ammonium salt of 2-sulfobenzoate as sole source of carbon, sulfur, nitrogen, and energy. The xenobiotic sulfo substituent was dioxygenolytically eliminated as sulfite, which was then slowly oxidized to sulfate. 2,3-Dihydroxybenzoate, which resulted from desulfonation underwent meta-cleavage, mediated by 2,3-dihydroxybenzoate 3,4-dioxygenase activity. This enzyme was inhibited by 3-chlorocatechol and 2,3,4-trihydroxybenzoate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1992.tb05231.x
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  • 8
    Electronic Resource
    Electronic Resource
    Metabolism of 3-methyldiphenyl ether by Sphingomonas sp. SS31 (1992)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 96 (1992), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The bacterium Sphingomonas sp. SS31, which was obtained from the diphenyl ether-degrading strain Sphingomonas sp. SS3 by an adaptation process, utilized 3-methyldiphenyl ether for growth in addition to diphenyl ether. The initial enzymatic attack onto this compound proceeded by a regioselective, but non-specific dioxygenation at the carbon carrying the ether bridge and the adjacent carbon of the unsubstituted as well as the methyl-substituted aromatic nucleus. Upon spontaneous decomposition, the resulting unstable hemiacetal structure yielded 3-methylphenol and catechol, or phenol, 3-methylcatechol, and 4-methylcatechol, respectively. Phenol and 3-methylphenol methylphenol were oxidized to the corresponding catechols which, after subsequent ortho-cleavage, were channeled into the oxoadipate pathway. Minor amounts of 3-(hydroxymethyl)-diphenyl ether detected in the supernatant of the culture broth gave evidence for an unproductive oxidation of the side-chain, finally leading to the nondegradble product 3-carboxydiphenyl ether.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1992.tb05426.x
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  • 9
    Electronic Resource
    Electronic Resource
    Biotransformation of diphenyl ether by the yeastTrichosporon beigelii SBUG 752 (1995)
    Springer
    Biodegradation 6 (1995), S. 173-180 
    Details
    ISSN: 1572-9729
    Keywords: aromatic ring cleavage ; degradation ; dioxin like compounds ; diphenyl ether ; Trichosporon beigelii
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Trichosporon beigelii SBUG 752 was able to transform diphenyl ether. By TLC, HPLC, GC, GC-MS, NMR- and UV-spectroscopy, several oxidation products were identified. The primary attack was initiated by a monooxygenation step, resulting in the formation of 4-hydroxydiphenyl ether, 2-hydroxydiphenyl ether and 3-hydroxydiphenyl ether (48:47:5). Further oxidation led to 3,4-dihydroxydiphenyl ether. As a characteristic product resulting from the cleavage of an aromatic ring, the lactone of 2-hydroxy-4-phenoxymuconic acid was identified. The possible mechanism of ring cleavage to yield this metabolite is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695348
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