Coenzymes of methanogenesis from hydrogen and carbon dioxide

Methanogenic bacteria gain their energy for growth from the conversion of a number of simple carbon compounds to methane. With a few exceptions all species known to date are able to reduce CO2 at which hydrogen acts as the electron donor. The reduction of CO2 can formally be considered to proceed th...

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Bibliographic Details
Published in:Antonie van Leeuwenhoek 1984-01, Vol.50 (4), p.383-396
Main Author: KELTJENS, J. T
Format: Article
Language:English
Subjects:
Bacteriology
Biological and medical sciences
Biology of microorganisms of confirmed or potential industrial interest
Biotechnology
Carbon Dioxide - metabolism
Chemical Phenomena
Chemistry
Coenzymes - metabolism
Electron Transport
Euryarchaeota - enzymology
Euryarchaeota - metabolism
Fundamental and applied biological sciences. Psychology
Furans - metabolism
Hydrogen - metabolism
Mesna - metabolism
Metabolism. Enzymes
Metalloporphyrins
Metalloproteins - metabolism
Methane - biosynthesis
Microbiology
Mission oriented research
Models, Biological
Nickel - metabolism
Oxidation-Reduction
Physiology and metabolism
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Summary:Methanogenic bacteria gain their energy for growth from the conversion of a number of simple carbon compounds to methane. With a few exceptions all species known to date are able to reduce CO2 at which hydrogen acts as the electron donor. The reduction of CO2 can formally be considered to proceed through the formyl, the formaldehyde and the methyl level of reduction. These C1-units do not occur as free intermediates, but they remain bound to a number of unique coenzymes during the process. In this paper a survey is given of the structures and functions of these compounds; it deals with methanopterin derivatives, carbon dioxide reduction (CDR) factor, factor F430 and coenzyme M derivatives. A model of the process of methanogenesis that integrates previous ones and that allocates a function to the various coenzymes is presented.
ISSN:0003-6072
1572-9699
DOI:10.1007/BF00394653