6cin

Crystal structure of pyruvate:ferredoxin oxidoreductase from Moorella thermoacetica

spinqualitylabelsall models 6cin, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6cin is a 6 chain structure with sequence from Moota. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: MG, SF4, SO4, TPP Related: 6cio, 6cip, 6ciq Gene: Moth_0064 (MOOTA) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [Q2RMD6_MOOTA] Oxidoreductase required for the transfer of electrons from pyruvate to flavodoxin.[PIRNR:PIRNR000159] Publication Abstract from PubMed Pyruvate:ferredoxin oxidoreductase (PFOR) is a microbial enzyme that uses thiamine pyrophosphate (TPP), three [4Fe-4S] clusters, and coenzyme A (CoA) in the reversible oxidation of pyruvate to generate acetyl-CoA and carbon dioxide. The two electrons that are generated as a result of pyruvate decarboxylation are used in the reduction of low potential ferredoxins, which provide reducing equivalents for central metabolism, including the Wood-Ljungdahl pathway. PFOR is a member of the 2-oxoacid:ferredoxin oxidoreductase (OFOR) superfamily, which plays major roles in both microbial redox reactions and carbon dioxide fixation. Here, we present a set of crystallographic snapshots of the best-studied member of this superfamily, the PFOR from Moorella thermoacetica (MtPFOR). These snapshots include the native structure, those of lactyl-TPP and acetyl-TPP reaction intermediates, and the first of an OFOR with CoA bound. These structural data reveal the binding site of CoA as domain III, the function of which in OFORs was previously unknown, and establish sequence motifs for CoA binding in the OFOR superfamily. MtPFOR structures further show that domain III undergoes a conformational change upon CoA binding that seals off the active site and positions the thiolate of CoA directly adjacent to the TPP cofactor. These structural findings provide a molecular basis for the experimental observation that CoA binding accelerates catalysis by 10(5)-fold. Binding site for coenzyme A revealed in the structure of pyruvate:ferredoxin oxidoreductase from Moorella thermoacetica.,Chen PY, Aman H, Can M, Ragsdale SW, Drennan CL Proc Natl Acad Sci U S A. 2018 Mar 26. pii: 1722329115. doi:, 10.1073/pnas.1722329115. PMID:29581263 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Pyruvate-ferredoxin oxidoreductase

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