1ivx: Difference between revisions

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{{STRUCTURE_1ivx|  PDB=1ivx  |  SCENE=  }}  
{{STRUCTURE_1ivx|  PDB=1ivx  |  SCENE=  }}  


'''Crystal structure of copper amine oxidase from Arthrobacter globiformis: Holo form generated by biogenesis in crystal.'''
===Crystal structure of copper amine oxidase from Arthrobacter globiformis: Holo form generated by biogenesis in crystal.===




==Overview==
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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.
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==About this Structure==
==About this Structure==
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[[Category: Quinone cofactor]]
[[Category: Quinone cofactor]]
[[Category: Tpq]]
[[Category: Tpq]]
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