title: Crystallographic study of multi-drug resistant HIV-1 protease lopinavir complex: mechanism of drug recognition and resistance.
abstract: Lopinavir (LPV) is a second generation HIV-1 protease inhibitor. Drug resistance has rapidly emerged against LPV since its US FDA approval on September 15, 2000. Mutations at residues 32I, L33F, 46I, 47A, I54V, V82A, I84V, and L90M render the protease drug resistant against LPV. We report the crystal structure of a clinical isolate multi-drug resistant (MDR) 769 HIV-1 protease (resistant mutations at residues 10, 36, 46, 54, 62, 63, 71, 82, 84, and 90) complexed with LPV and the in vitro enzymatic IC50 of LPV against MDR 769. The structural and functional studies demonstrate significant drug resistance of MDR 769 against LPV, arising from reduced interactions between LPV and the protease target.
authors.affiliation: Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, MI 48201, United States.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Liu
authors.forename: Ravikiran S
authors.initials: RS
authors.lastname: Yedidi
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.forename: Tamaria G
authors.initials: TG
authors.lastname: Dewdney
authors.forename: Samuel J
authors.initials: SJ
authors.lastname: Reiter
authors.forename: Joseph S
authors.initials: JS
authors.lastname: Brunzelle
authors.forename: Iulia A
authors.initials: IA
authors.lastname: Kovari
authors.forename: Ladislau C
authors.initials: LC
authors.lastname: Kovari
mesh_terms: D018360:Crystallography, X-Ray / Q000379:methods*; D024882:Drug Resistance, Viral / Q000235:genetics; D016333:HIV Protease / Q000737:chemistry*; D017320:HIV Protease Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D006860:Hydrogen Bonding; D061466:Lopinavir / Q000737:chemistry / Q000494:pharmacology*; D008958:Models, Molecular
chemical_list: D017320:HIV Protease Inhibitors; D061466:Lopinavir; D016333:HIV Protease; C514803:p16 protease, Human immunodeficiency virus 1
keywords: HAART; HIV-1 protease; IC50; LPV; Lopinavir; MDR; Multi-drug resistance; RMSD; X-ray crystallography; half maximal inhibitory concentration; highly active anti-retroviral therapy; lopinavir; multi-drug resistance; root mean square deviation