Structural highlights
5t5m is a 6 chain structure with sequence from Methanothermobacter wolfeii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | GOL, H2S, K, MG, MGD, SF4, W, ZN |
| NonStd Res: | KCX |
| Activity: | Formylmethanofuran dehydrogenase, with EC number 1.2.99.5 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Publication Abstract from PubMed
Biological methane formation starts with a challenging adenosine triphosphate (ATP)-independent carbon dioxide (CO2) fixation process. We explored this enzymatic process by solving the x-ray crystal structure of formyl-methanofuran dehydrogenase, determined here as Fwd(ABCDFG)2 and Fwd(ABCDFG)4 complexes, from Methanothermobacter wolfeii The latter 800-kilodalton apparatus consists of four peripheral catalytic sections and an electron-supplying core with 46 electronically coupled [4Fe-4S] clusters. Catalysis is separately performed by subunits FwdBD (FwdB and FwdD), which are related to tungsten-containing formate dehydrogenase, and subunit FwdA, a binuclear metal center carrying amidohydrolase. CO2 is first reduced to formate in FwdBD, which then diffuses through a 43-angstrom-long tunnel to FwdA, where it condenses with methanofuran to formyl-methanofuran. The arrangement of [4Fe-4S] clusters functions as an electron relay but potentially also couples the four tungstopterin active sites over 206 angstroms.
The methanogenic CO2 reducing-and-fixing enzyme is bifunctional and contains 46 [4Fe-4S] clusters.,Wagner T, Ermler U, Shima S Science. 2016 Oct 7;354(6308):114-117. PMID:27846502[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
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