ISSN:
1573-6881
Keywords:
Wolinella succinogens
;
electron transport
;
hydrogenase
;
format dehydrogenase
;
menaquinone
;
fumarate reductase
;
anaerobic respiration
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
,
Physics
Notes:
Abstract Electron transport-coupled phosphorylation with fumarate as terminal acceptor inWolinella succinogenes yields less than 1 ATP/2 electrons. The $$\Delta \tilde \mu _{\text{H}} $$ generated by the electron transport is 0.18V and the H+/electron ratio is 1. The electron transport chain is made up of two dehydrogenases (hydrogenase and formate dehydrogenase) that catalyze the reduction of menaquinone, and fumarate reductase which catalyzes the oxidation of menaquinol.C-type cytochromes are not involved. The phosphorylative electron transport with sulfur as terminal acceptor inW. succinogenes orDesulfuromonas acetoxidans does not involve known quinones. The ATP yields should be even smaller than those with fumarate. Succinate oxidation by sulfur, which is a catabolic reaction inD. acetoxidans, is accomplished by reversed electron transport.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00743465
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