Download MendeleyX-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.(2002) Nat Struct Biol 9: 591-596
- PubMed: 12134140
- DOI: https://doi.org/10.1038/nsb824
- Primary Citation of Related Structures:
1IVU, 1IVV, 1IVW, 1IVX - PubMed Abstract:
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.
Organizational Affiliation:
School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan.
