Structural Basis of Single-Nucleotide Polymorphisms in Cytochrome P450 2C9Maekawa, K., Adachi, M., Matsuzawa, Y., Zhang, Q., Kuroki, R., Saito, Y., Shah, M.B.
(2017) Biochemistry 56: 5476-5480
- PubMed: 28972767
- DOI: 10.1021/acs.biochem.7b00795
- Primary Citation of Related Structures:
- PubMed Abstract:
Single-nucleotide polymorphisms in drug-metabolizing cytochrome P450 (CYP) enzymes are important contributors to interindividual differences in drug metabolism leading to adverse drug reactions. Despite their extensive characterization and importance ...
Single-nucleotide polymorphisms in drug-metabolizing cytochrome P450 (CYP) enzymes are important contributors to interindividual differences in drug metabolism leading to adverse drug reactions. Despite their extensive characterization and importance in pharmacogenetics of clinical drugs, the structural basis of CYP polymorphisms has remained scant. Here we report the crystal structures of human CYP2C9 and its polymorphic variants, *3 (I359L) and *30 (A477T), with an antihypertensive drug losartan. The structures show distinct interaction and occupation of losartan in the active site, the access channel, and the peripheral binding site. The I359L substitution located far from the active site remarkably altered the residue side chains near the active site and the access channel, whereas the T477 substitution illustrated hydrogen-bonding interaction with the reoriented side chain of Q214. The results yield structural insights into the reduced catalytic activity of the CYP2C9 variants and have important implications for understanding genetic polymorphisms in CYP-mediated drug metabolism.
Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts , Kodo, Kyotanabe, Kyoto 610-0395, Japan.,Japan Atomic Energy Agency , 2-4 Shirane Shirakata, Tokai-mura, Ibaraki 319-1195, Japan.,Department of Pharmaceutical Sciences, University of Connecticut , Storrs, Connecticut 06267, United States.,Division of Medicinal Safety Science, National Institute of Health Sciences , Kamiyoga 1-18-1, Setagaya, Tokyo 158-8501, Japan.,National Institutes for Quantum and Radiological Science and Technology , 2-4 Shirane Shirakata, Tokai-mura, Ibaraki 319-1106, Japan.,Department of Integrative Structural and Computational Biology, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States.,Department of Pharmaceutical Sciences, Albany College of Pharmacy and Health Sciences , 106 New Scotland Avenue, Albany, New York 12208, United States.