1h4i

Methylobacterium extorquens methanol dehydrogenase

spinqualitylabelsall models 1h4i, resolution 1.94Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1h4i is a 4 chain structure with sequence from Methylorubrum extorquens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.94Å Ligands: CA, PQQ Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function DHM1_METEA Catalyzes the oxidation of primary alcohols including methanol. 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 BACKGROUND: Methanol dehydrogenase (MDH) is a bacterial periplasmic quinoprotein; it has pyrrolo-quinoline quinone (PQQ) as its prosthetic group, requires Ca2+ for activity and uses cytochrome cL as its electron acceptor. Low-resolution structures of MDH have already been determined. RESULTS: The structure of the alpha 2 beta 2 tetramer of MDH from Methylobacterium extorquens has now been determined at 1.94 A with an R-factor of 19.85%. CONCLUSIONS: The alpha-subunit of MDH has an eight-fold radial symmetry, with its eight beta-sheets stabilized by a novel tryptophan docking motif. The PQQ in the active site is held in place by a coplanar tryptophan and by a novel disulphide ring formed between adjacent cysteines which are bonded by an unusual non-planar trans peptide bond. One of the carbonyl oxygens of PQQ is bonded to the Ca2+, probably facilitating attack on the substrate, and the other carbonyl oxygen is out of the plane of the ring, confirming the presence of the predicted free-radical semiquinone form of the prosthetic group. The refined structure of the quinoprotein methanol dehydrogenase from Methylobacterium extorquens at 1.94 A.,Ghosh M, Anthony C, Harlos K, Goodwin MG, Blake C Structure. 1995 Feb 15;3(2):177-87. PMID:7735834 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Methanol dehydrogenase

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