Alternative Pathways for Siroheme Synthesis in Klebsiella aerogenes
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چکیده
منابع مشابه
Alternative pathways for siroheme synthesis in Klebsiella aerogenes.
Siroheme, the cofactor for sulfite and nitrite reductases, is formed by methylation, oxidation, and iron insertion into the tetrapyrrole uroporphyrinogen III (Uro-III). The CysG protein performs all three steps of siroheme biosynthesis in the enteric bacteria Escherichia coli and Salmonella enterica. In either taxon, cysG mutants cannot reduce sulfite to sulfide and require a source of sulfide ...
متن کاملCatabolite repression and derepression of arylsulfatase synthesis in Klebsiella aerogenes.
When a mutant (Mao(-)) of Klebsiella aerogenes lacking an enzyme for tyramine degradation (monoamine oxidase) was grown with d-xylose as a carbon source, arylsulfatase was repressed by inorganic sulfate and repression was relieved by tyramine. When the cells were grown on glucose, tyramine failed to derepress the arylsulfatase synthesis. When grown with methionine as the sole sulfur source, the...
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The utilization of glycerol as a carbon source for growth by Klebsiella aerogenes, strain 2103, involves separate aerobic (sn-glycerol-3-phosphate or G3P) and anaerobic (dihydroxyacetone or DHA) pathways of catabolism. Enzyme and transport activities of the aerobic pathway are elevated in cells grown under oxygenated conditions on glycerol or G3P. Anaerobic growth on G3P as carbon source requir...
متن کاملD-Arabitol catabolic pathway in Klebsiella aerogenes.
Klebsiella aerogenes strain W70 has an inducible pathway for the degradation of d-arabitol which is comparable to the one found in Aerobacter aerogenes strain PRL-R3. The pathway is also similar to the pathway of ribitol catabolism in that it is composed of a pentitol dehydrogenase, d-arabitol dehydrogenase (ADH), and a pentulokinase, d-xylulokinase (DXK). These two enzymes are coordinately con...
متن کاملMethionine-to-cysteine recycling in Klebsiella aerogenes.
In the enteric bacteria Escherichia coli and Salmonella enterica, sulfate is reduced to sulfide and assimilated into the amino acid cysteine; in turn, cysteine provides the sulfur atom for other sulfur-bearing molecules in the cell, including methionine. These organisms cannot use methionine as a sole source of sulfur. Here we report that this constraint is not shared by many other enteric bact...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 2001
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.183.1.328-335.2001