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  • 1
    Electronic Resource
    Electronic Resource
    Purification and properties of β-lysine mutase, a pyridoxal phosphate and B12 coenzyme dependent enzyme (1973)
    s.l. : American Chemical Society
    Biochemistry 12 (1973), S. 1054-1063 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00730a006
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  • 2
    Electronic Resource
    Electronic Resource
    Purification and properties of L-erythro-3,5-diaminohexanoate dehydrogenase from Clostridium sticklandii (1974)
    s.l. : American Chemical Society
    Biochemistry 13 (1974), S. 292-299 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00699a010
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  • 3
    Electronic Resource
    Electronic Resource
    Bacteria in the Intestinal Tract of Different Species of Arthropods (1997)
    Springer
    Microbial ecology 33 (1997), S. 189 -197 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The number of bacteria in the intestine of 12 species of arthropods, belonging to 7 different orders, was determined to obtain information about the significance of intestinal bacteria for the digestion of food. Therefore, a simple and effective method for direct counts of 4′, 6-diamidino-2-phenylindole (DAPI) stained bacteria from the gastrointestinal tract of arthropods was developed. The intestinal bacteria could be released from the gut wall by ultrasonic treatment in the presence of sodium tetrapyrophosphate (PPi). The bacterial counts ranged between 0.2 and 3.6 × 109 (ml gut)−1 in the foregut, 0.2 and 28 × 109 (ml gut)−1 in the midgut, and 0.1 and 190 × 109 (ml gut)−1 in the hindgut. The foregut and hindgut of Hylotrupes bajules larvae were devoid of bacteria; the whole intestinal tract of Eurycanta calcarata and Schistocerca gragaria contained only low numbers of bacteria. The population of bacteria in some parts of the intestinal tract of several arthropods were high enough to suggest a potential contribution to digestive processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002489900021
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  • 4
    Electronic Resource
    Electronic Resource
    Mutants of Pseudomonas aeruginosa unable to inactivate allantoinase and NADP-dependent glutamate dehydrogenase (1984)
    Springer
    Archives of microbiology 140 (1984), S. 40-43 
    Details
    ISSN: 1432-072X
    Keywords: enzyme inactivation ; Non-inactivating mutants ; Allantoinase ; Pseudomonas aeruginosa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Both allantoinase and NADP-GDH in Pseudomonas aeruginosa were inactivated when cells reached the stationary phase of growth. Mutants unable to inactivate these enzymes were isolated. Results with recombinants showed that the mutation is not located in the structural genes of these enzymes but in an independent gene involved in the inactivation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409769
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  • 5
    Electronic Resource
    Electronic Resource
    Chemotaxis toward amino acids inBacillus subtilis (1974)
    Springer
    Archives of microbiology 96 (1974), S. 83-92 
    Details
    ISSN: 1432-072X
    Keywords: Chemotaxis ; Chemoreceptor ; Motility ; Bacillus subtilis ; Aerotaxis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Quantitative measurement of positive chemotaxis inBacillus subtilis was performed by means of adaption of the procedure used in studies withEscherichia coli. The motility ofB. subtilis was optimal in the presence of an exogeneous energy source and a nonionic detergent,e. g. Tween 80 or Brij-36. B. subtilis is chemotactic toward the commonly occurringL-amino acids except arginine, lysine, aspartate and glutamate. No chemotactic response was observed towardD-amino acids. Threshold, optimal response and peak concentration were determined. Chemotaxis toward glutamine was optimal at pH 6-7 and a temperature of 32°C. The maximum response toward a particular attractant was presumably influenced by the aerotactic behavior ofB. subtilis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00590165
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  • 6
    Electronic Resource
    Electronic Resource
    Proton-motive force and the motile behavior of Bacillus subtilis (1976)
    Springer
    Archives of microbiology 111 (1976), S. 7-11 
    Details
    ISSN: 1432-072X
    Keywords: Bacillus subtilis ; Motility ; Chemotaxis ; Chemoreceptor ; Tumble generator ; Proton-motive force
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in the proton-motive force cause a transient change in the motile behavior of Bacillus subtilis cells. Both an increase and a decrease in the proton-motive force cause transient tumbling. Simultaneous decrease of proton-motive force and increase of attractant concentration lessens the response toward the attractant. A simultaneous increase of proton-motive force and increase of attractant concentration prolonges the response toward attractant. A hypothesis explaining the various effects is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446543
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  • 7
    Electronic Resource
    Electronic Resource
    Inactivation of allantoinase from Pseudomonas aeruginosa by a subunit of urease (1976)
    Springer
    Archives of microbiology 111 (1976), S. 117-122 
    Details
    ISSN: 1432-072X
    Keywords: Allantoin ; Allantoinase ; Urease ; Enzyme inactivation ; Epienzymatic control ; Pseudomonas aeruginosa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cell-free extracts prepared from Pseudomonas aeruginosa cells, cultured in a medium containing allantoin as sole source of carbon, nitrogen and energy and harvested in the stationary phase, contain an enzymicly inactive allantoinase-inhibitor complex. Pure inhibitor was isolated by dissociation of this complex followed by gelfiltration. The inhibitor had a molecular weight of about 5500 daltons. Association between inhibitor and allantoinase was demonstrated by gelfiltration and by polyacrylamide gel-electrophoresis. The inhibitor was unstable in the absence of 1 M urea and the inactivation was accompanied by aggregate formation and appearance of urease activity. The inhibitor was also isolated from cells containing urease but no allantoinase. It was concluded that the inhibitor is a subunit of urease. Inhibitors isolated from P. aeruginosa and P. acidovorans cells were active against both allantoinase from P. aeruginosa and allantoinase from P. acidovorans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446558
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  • 8
    Electronic Resource
    Electronic Resource
    Hydrolysis and synthesis of ATP by membrane-bound ATPase from a motile Streptococcus (1978)
    Springer
    Archives of microbiology 119 (1978), S. 31-36 
    Details
    ISSN: 1432-072X
    Keywords: Motile Streptococcus ; Membrane-bound ATPase ; DCCD ; Valinomycin ; Uncouplers ; Protonmotive force ; ATP synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract ATPase was detected in the membranes of a motile Streptococcus. Maximal enzymic activity was observed at pH 8 and ATP/Mg2+ ratio of 2. Mn2+ and Ca2+ could replace Mg2+ to some extent. Besides ATP, GTP and ITP were substrates. The enzyme was inhibited by N,N′-dicyclohexylcarbodiimide but not by sodium azide, uncouplers or bathophenanthroline. An electrochemical gradient of protons, which was artificially imposed across the membranes of Streptococcus cells by manipulation of either the K+ diffusion potential or the transmembrane pH gradient, led to ATP synthesis. ATP synthesis was abolished by proton conductors, an inhibitor of the ATPase or an increase in the extracellular K+ concentration. A comparison between the phosphate potential and the electrochemical proton gradient showed that the data found are in agreement with a stoichiometry of 2 protons translocated per molecule ATP synthesized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00407924
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  • 9
    Electronic Resource
    Electronic Resource
    Growth of Bacillus fastidiosus on glycerol and the enzymes of ammonia assimilation (1986)
    Springer
    Archives of microbiology 146 (1986), S. 292-294 
    Details
    ISSN: 1432-072X
    Keywords: Bacillus fastidiosus ; Growth on glycerol ; Glycerol kinase ; Ammonia assimilation ; Glutamate dehydrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Bacillus fastidiosus was able to grow on glycerol as a carbon source when allantoin or urate was used as nitrogen source. The primary assimilatory enzyme for glycerol was glycerol kinase; glycerol dehydrogenase could not be detected. The glycerol kinase activity was increased 30-fold in allantoin/glycerol-grown cells as compared to alantoin-grown cells. Under both growth conditions high levels of glutamate dehydrogenase were found. Glutamine synthetase and glutamate synthase activities could not be demonstrated, while low levels of alanine dehydrogenase were present. It is concluded that B. fastidiosus assimilates ammonia by the NADP-dependent glutamate dehydrogenase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00403232
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of amino acids on the motile behavior of Bacillus subtilis (1977)
    Springer
    Archives of microbiology 113 (1977), S. 153-158 
    Details
    ISSN: 1432-072X
    Keywords: Chemotaxis ; Motility ; Velocity ; Methionine starvation ; Bacillus subtilis 60015
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Constant levels of amino acids enhanced the velocity of Bacillus subtilis 60015 cells about 2-fold and stimulated the response in motility assays. The stimulation of velocity did not occur via the receptors for chemotaxis. Cysteine and methionine, general inhibitors of chemotaxis, both completely inhibited the smooth response in a temporal gradient of attractant. After methionine starvation B. subtilis 60015 showed no measurable response in a temporal gradient of attractant, this in contrast to the effect observed with some other bacteria. Addition of methionine to starved cells restored the response toward attractant. Revertants of B. subtilis 60015 for methionine requirement could not be starved and showed a normal behavior toward temporal gradients of attractant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00428596
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