FAD requirement for the reduction of coenzyme F420 by formate dehydrogenase from Methanobacterium formicicum.
AUTOR(ES)
Schauer, N L
RESUMO
The partial purification of the formate dehydrogenase from cell-free extracts of Methanobacterium formicicum decreased the rate of coenzyme F420 reduction 175-fold relative to the rate of methyl viologen reduction. FAD, isolated from this organism, reactivated the coenzyme F420-dependent activity of purified formate dehydrogenase and restored the activity ratio (coenzyme F420/methyl viologen) to near that in cell-free extracts. Neither flavin mononucleotide nor FADH2 replaced FAD. The reduced form of FAD inhibited the reactivation of coenzyme F420-dependent formate dehydrogenase activity by the oxidized form. The results suggest that native formate dehydrogenase from Methanobacterium formicicum contains noncovalently bound FAD that is required for coenzyme F420-dependent activity.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=217711Documentos Relacionados
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