Download MendeleyThe 1.23 A Structure of Pichia Pastoris Lysyl Oxidase Reveals a Lysine-Lysine Cross-Link
Duff, A.P., Cohen, A.E., Ellis, P.J., Hilmer, K., Langley, D.B., Dooley, D.M., Freeman, H.C., Guss, J.M.(2006) Acta Crystallogr D Biol Crystallogr 62: 1073
- PubMed: 16929109
- DOI: https://doi.org/10.1107/S0907444906026333
- Primary Citation of Related Structures:
1W7C - PubMed Abstract:
The structure of Pichia pastoris lysyl oxidase (PPLO) in a new crystal form has been refined at 1.23 Angstrom resolution. PPLO, a copper amine oxidase (CuAO) with a 2,4,5-trihydroxyphenylalanine quinone (TPQ) cofactor, differs from most other members of the CuAO enzyme family in having the ability to oxidize the side chain of lysine residues in a polypeptide. In the asymmetric unit of the crystals, the structure analysis has located residues 43-779 of the polypeptide chain, seven carbohydrate residues, the active-site Cu atom, an imidazole molecule bound at the active site, two buried Ca(2+) ions, five surface Mg(2+) ions, five surface Cl(-) ions and 1045 water molecules. The crystallographic residuals are R = 0.112 and R(free) = 0.146. The TPQ cofactor and several other active-site residues are poorly ordered, in contrast to the surrounding well ordered structure. A covalent cross-link is observed between two lysine residues, Lys778 and Lys66. The cross-link is likely to have been formed by the oxidation of Lys778 followed by a spontaneous reaction with Lys66. The link is modelled as dehydrolysinonorleucine.
Organizational Affiliation:
School of Molecular and Microbial Biosciences, University of Sydney, NSW 2006, Australia.
