Electron Carrier Proteins in Desulfovibrio Vulgaris Miyazaki
Desulfovibrio vulgaris Miyazaki, a sulfate-reducing bacterium, resembles the type strain, D. vulgaris Hildenborough, in the amino acid sequences of cytochrome c3 (Shinkai et al., 1980), cytochrome c-553 (Nakano et al., 1983; Van Rooijen et al., 1989), and rubredoxin (Shimizu et al., 1989), but differs in morphology (Kobayashi and Skyring, 1982) and in the characteristics of periplasmic hydrogenase (Yagi et al., 1978). D. vulgaris Miyazaki lives on lactate and sulfate. The overall reaction to yield energy is the oxidation of lactate with sulfate 2 CH3 CHOHCOO¯ + S04 2¯ → 2 CH3 COO¯ + 2 HCO3¯ + H2S ΔG=-l60kJ This reaction is composed of two reaction paths, the lactate degradation path and the sulfate reduction path. The lactate degradation path is composed of four reactions, and results in the production of ATP by the substrate level phosphorylation (Ogata et al., 1981; Ogata and Yagi, 1986; Ogata et al., 1988).
KeywordsChrome Lactate Pyruvate HCO3 Dehydrogenation
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