1b25

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{{STRUCTURE_1b25| PDB=1b25 | SCENE= }}
{{STRUCTURE_1b25| PDB=1b25 | SCENE= }}
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'''FORMALDEHYDE FERREDOXIN OXIDOREDUCTASE FROM PYROCOCCUS FURIOSUS'''
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===FORMALDEHYDE FERREDOXIN OXIDOREDUCTASE FROM PYROCOCCUS FURIOSUS===
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==Overview==
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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.
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(as it appears on PubMed at http://www.pubmed.gov), where 10024458 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10024458}}
==About this Structure==
==About this Structure==
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[[Category: Tungsten containing protein]]
[[Category: Tungsten containing protein]]
[[Category: Tungstoenzyme]]
[[Category: Tungstoenzyme]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 18:04:10 2008''

Revision as of 15:04, 30 June 2008

Image:1b25.png

Template:STRUCTURE 1b25

FORMALDEHYDE FERREDOXIN OXIDOREDUCTASE FROM PYROCOCCUS FURIOSUS

Template:ABSTRACT PUBMED 10024458

About this Structure

1B25 is a Single protein structure of sequence from Pyrococcus furiosus. 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

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