1b25
From Proteopedia
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FORMALDEHYDE FERREDOXIN OXIDOREDUCTASE FROM PYROCOCCUS FURIOSUS
Overview
Crystal structures of formaldehyde ferredoxin oxidoreductase (FOR), a, tungstopterin-containing protein from the hyperthermophilic archaeon, Pyrococcus furiosus, have been determined in the native state and as a, complex with the inhibitor glutarate at 1.85 A and 2. 4 A resolution, respectively. The native structure was solved by molecular replacement, using the structure of the homologous P. furiosus aldehyde ferredoxin, oxidoreductase (AOR) as the initial model. Residues are identified in FOR, that may be involved in either the catalytic mechanism or in determining, substrate specificity. The binding site on FOR for the physiological, electron acceptor, P. furiosus ferredoxin (Fd), has been established from, an FOR-Fd cocrystal structure. Based on the arrangement of redox centers, in this structure, an electron transfer pathway is proposed that begins at, the tungsten center, leads to the (4Fe:4S) cluster of FOR via one of the, two pterins that coordinate the tungsten, and ends at the (4Fe:4S) cluster, of ferredoxin. This pathway includes two residues that coordinate the, (4Fe:4S) clusters, Cys287 of FOR and Asp14 of ferredoxin. Similarities in, the active site structures between FOR and the unrelated molybdoenzyme, aldehyde oxidoreductase from Desulfovibrio gigas suggest that both enzymes, utilize a common mechanism for aldehyde oxidation.
About this Structure
1B25 is a Single protein structure of sequence from Pyrococcus furiosus with SF4 and PTT as ligands. Full crystallographic information is available from OCA.
Reference
Formaldehyde ferredoxin oxidoreductase from Pyrococcus furiosus: the 1.85 A resolution crystal structure and its mechanistic implications., Hu Y, Faham S, Roy R, Adams MW, Rees DC, J Mol Biol. 1999 Feb 26;286(3):899-914. PMID:10024458
Page seeded by OCA on Sat Nov 24 23:37:17 2007
