1ivu
Crystal structure of copper amine oxidase from Arthrobacter globiformis: Initial intermediate in topaquinone biogenesis
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OverviewOverview
The quinone cofactor TPQ in copper amine oxidase is generated by, posttranslational modification of an active site tyrosine residue. Using, X-ray crystallography, we have probed the copper-dependent autooxidation, process of TPQ in the enzyme from Arthrobacter globiformis. Apo enzyme, crystals were anaerobically soaked with copper; the structure determined, from this crystal provides a view of the initial state: the unmodified, tyrosine coordinated to the bound copper. Exposure of the copper-bound, crystals to oxygen led to the formation of freeze-trapped intermediates;, structural analyses indicate that these intermediates contain, dihydroxyphenylalanine quinone and trihydroxyphenylalanine. These are the, first visualized intermediates during TPQ biogenesis in copper amine, oxidase.
About this StructureAbout this Structure
1IVU is a Single protein structure of sequence from Arthrobacter globiformis with CU as ligand. Active as Amine oxidase (copper-containing), with EC number 1.4.3.6 Full crystallographic information is available from OCA.
ReferenceReference
X-ray snapshots of quinone cofactor biogenesis in bacterial copper amine oxidase., Kim M, Okajima T, Kishishita S, Yoshimura M, Kawamori A, Tanizawa K, Yamaguchi H, Nat Struct Biol. 2002 Aug;9(8):591-6. PMID:12134140
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