Download MendeleyThe Structure of Human Cytochrome P450 2C9 Complexed with Flurbiprofen at 2.0 A Resolution
Wester, M.R., Yano, J.K., Schoch, G.A., Yang, C., Griffin, K.J., Stout, C.D., Johnson, E.F.(2004) J Biol Chem 279: 35630-35637
- PubMed: 15181000
- DOI: https://doi.org/10.1074/jbc.M405427200
- Primary Citation of Related Structures:
1R9O - PubMed Abstract:
The structure of human P450 2C9 complexed with flurbiprofen was determined to 2.0 A by x-ray crystallography. In contrast to other structurally characterized P450 2C enzymes, 2C5, 2C8, and a 2C9 chimera, the native catalytic domain of P450 2C9 differs significantly in the conformation of the helix F to helix G region and exhibits an extra turn at the N terminus of helix A. In addition, a distinct conformation of the helix B to helix C region allows Arg-108 to hydrogen bond with Asp-293 and Asn-289 on helix I and to interact directly with the carboxylate of flurbiprofen. These interactions position the substrate for regioselective oxidation in a relatively large active site cavity and are likely to account for the high catalytic efficiency exhibited by P450 2C9 for the regioselective oxidation of several anionic non-steroidal anti-inflammatory drugs. The structure provides a basis for interpretation of a number of observations regarding the substrate selectivity of P450 2C9 and the observed effects of mutations on catalysis.
Organizational Affiliation:
Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California 92037, USA.
