2iv2

Reinterpretation of reduced form of formate dehydrogenase H from E. coli

spinqualitylabelsall models 2iv2, resolution 2.27Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2iv2 is a 1 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.27Å Ligands: 2MD, MGD, MO Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function FDHF_ECOLI Decomposes formic acid to hydrogen and carbon dioxide under anaerobic conditions in the absence of exogenous electron acceptors. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Re-evaluation of the crystallographic data of the molybdenum-containing E. coli formate dehydrogenase H (Boyington et al. Science 275:1305-1308, 1997), reported in two redox states, reveals important structural differences for the formate-reduced form, with large implications for the reaction mechanism proposed in that work. We have re-refined the reduced structure with revised protocols and found substantial rearrangement in some parts of it. The original model is essentially correct but an important loop close to the molybdenum active site was mistraced, and, therefore, catalytic relevant residues were located in wrong positions. In particular selenocysteine-140, a ligand of molybdenum in the original work, and essential for catalysis, is no longer bound to the metal after reduction of the enzyme with formate. These results are incompatible with the originally proposed reaction mechanism. On the basis of our new interpretation, we have revised and proposed a new reaction mechanism, which reconciles the new X-ray model with previous biochemical and extended X-ray absorption fine structure data. Formate-reduced E. coli formate dehydrogenase H: The reinterpretation of the crystal structure suggests a new reaction mechanism.,Raaijmakers HC, Romao MJ J Biol Inorg Chem. 2006 Oct;11(7):849-54. Epub 2006 Jul 8. PMID:16830149 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Formate dehydrogenase 3D structures

Proteopedia Page Contributors and Editors (what is this?)

OCA