3n9h

Crystal Structural of mutant Y305A in the copper amine oxidase from hansenula polymorpha

spinqualitylabelsall models 3n9h, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3n9h is a 6 chain structure with sequence from Ogataea angusta. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.5Å Ligands: CU, TPQ Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function AMO_PICAN 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 The copper amine oxidases carry out two copper-dependent processes: production of their own redox-active cofactor (2,4,5-trihydroxyphenylalanine quinone, TPQ) and the subsequent oxidative deamination of substrate amines. Because the same active site pocket must facilitate both reactions, individual active site residues may serve multiple roles. We have examined the roles of a strictly conserved active site tyrosine Y305 in the copper amine oxidase from Hansenula polymorpha kinetically, spetroscopically (Dubois and Klinman (2006) Biochemistry 45, 3178), and, in the present work, structurally. While the Y305A enzyme is almost identical to the wild type, a novel, highly oxygenated species replaces TPQ in the Y305F active sites. This new structure not only provides the first direct detection of peroxy intermediates in cofactor biogenesis but also indicates the critical control of oxidation chemistry that can be conferred by a single active site residue. Mutation at a strictly conserved, active site tyrosine in the copper amine oxidase leads to uncontrolled oxygenase activity.,Chen ZW, Datta S, Dubois JL, Klinman JP, Mathews FS Biochemistry. 2010 Aug 31;49(34):7393-402. PMID:20684524 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Copper amine oxidase 3D structures

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