Bacteria acetogenic

The autotropic pathway for acetate synthesis among the acetogenic bacteria has been examined (67). Quantitative fermentation of one mole of glucose [50-99-7] yields three moles of acetic acid, while two moles of xylose [58-86-6] C H qO, yields five moles. The glucose reaction is... 

The most important physiological role of CODH in the metabolism of acetogenic bacteria was unknown until 1985, when it was shown that the enzyme is bifunctional and has acetyl-CoA synthase activity (121). It was previously thought that acetyl-CoA was synthesized at the cobalt center of a vitamin-Bi2-containing protein. In the same paper, it was proposed that nickel is the active site of CO oxidation and acetyl-CoA synthesis. 

A mixed microbial community was isolated for thiophene desulfurization using enrichments from oilfield samples and showed the presence of biphenyl as a by-product. However, a pure strain could not be obtained due to over-competence by homo-acetogenic bacteria in the consortium [23],... 

In addition to methanogens and some acetogens, bacteria capable of 1,2-propanediol fermentation have been reported to produce vitamin B12 [286]. The transformation of 1,2-propanediol (propylene glycol) to propionaldehyde requires vitamin B12. Further fermentation of propionaldehyde to n-propanol and propionic acid does not require vitamin B12 but yields energy for growth. 

Acetogenesis. Here, the fermentation products (mainly VFA) are converted into acetate, CO2 and H2 by the so called acetogenic bacteria. 

Das A, Ljungdahl LG. 2000. Acetogenesis and acetogenic bacteria. In Lederberg J, editor. Volume 1, Encyclopedia of microbiology. San Diego, CA Academic Press, p 18-27. 

Drake HL. 1994. Acetogenesis, acetogenic bacteria, and the acetyl-CoA Wood/ Ljungdahl pathway past and current perspectives. In Drake HL, editor. Acetogenesis. New York Chapman Hall. 

Drake HL, Daniel SL, Kiisel K, et al. 1997. Acetogenic bacteria what are the in situ consequences of their diverse metabolic versatilities Biofactors 6 13-24. 

Karnholz A, Ktlsel K, Goner A, Schramm A, Drake HL. 2002. Tolerance and metabolic response of acetogenic bacteria toward oxygen. Appl Environ Microbiol 68 1005-9. 

Lovell CR, Hui Y. 1991. Design and testing of a functional group-specific DNA probe for the study of natural populations of acetogenic bacteria. Appl Environ Microbiol 57 2602-9. 

Figure 14.1. Proposed electron-transport pathway in the acetogenic bacteria M. thermoacetica and M. thermoautotrophica. Cyt., cytochrome MTi/FD//, methylene tetrahydrofolate dehydrogenase Fd, ferredoxin Fp, flavoprotein H2ase, hydrogenase.

Ivey DM. 1986. Generation of energy during CO2 fixation in acetogenic bacteria [dissertation]. Athens University of Georgia. 

Ljungdahl LG. 1986. The autotrophic pathway of acetate synthesis in acetogenic bacteria. Annu Rev Microbiol 40 415-50. 

Wood HG, Ljungdahl LG. 1991. Autotrophic character of the acetogenic bacteria. In Shively JM, Barton LL, editors. Variations of autotrophic Ufe. New York Academic Press, p 201-50. 

Hydrogen-producing acetogenic bacteria that metabolize organic acids... 

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