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Published December 15, 2011 | public
Book Section - Chapter

Formaldehyde Ferredoxin Oxidoreductase


Formaldehyde ferredoxin oxidoreductase (FOR) is a homotetramer where each subunit contains a [4Fe–4S] cluster and a mononuclear tungsten atom coordinated by the dithioline groups of two pterin molecules. It is a member of a family of five closely related tungstoenzymes found in organisms that grow at high temperatures in marine volcanic vents. FOR catalyzes the two-electron oxidation of its aldehyde substrate to the corresponding acid with the concomitant reduction of ferredoxin, its physiological electron acceptor. FOR oxidizes short chain C_1-C_4 aldehydes as substrates but has the highest affinity for C_4-C_6 di- and semialdehydes. The enzyme is proposed to have a role in peptide metabolism.

Additional Information

© 2011 John Wiley & Sons, Ltd. Published Online: 15 DEC 2011. Research on tungstoenzymes carried out in the authors' laboratories was supported by grants from the Department of Energy, the National Science Foundation and the National Institutes of Health.

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