3oxc | pdb_00003oxc

Wild Type HIV-1 Protease with Antiviral Drug Saquinavir

spinqualitylabelsall models 3oxc, resolution 1.16Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3oxc is a 2 chain structure with sequence from 9hiv1. This structure supersedes the now removed PDB entry 2nmw. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FMT, ROC, SO4 Related: 2ien, 3mws, 3nu3, 3cyx, 3d1x, 3d1y, 2nmy, 2nmz, 2nnk, 2nnp Gene: pol (9HIV1) Activity: HIV-1 retropepsin, with EC number 3.4.23.16 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Saquinavir (SQV), the first antiviral HIV-1 protease (PR) inhibitor approved for AIDS therapy, has been studied in complexes with PR and the variants PR(I) (84V) and PR(V) (82A) containing the single mutations I84V and V82A that provide resistance to all the clinical inhibitors. Atomic resolution crystal structures (0.97-1.25 A) of the SQV complexes were analyzed in comparison to the protease complexes with darunavir, a new drug that targets resistant HIV, in order to understand the molecular basis of drug resistance. PR(I) (84V) and PR(V) (82A) complexes were obtained in both the space groups P2(1)2(1)2 and P2(1)2(1)2(1), which provided experimental limits for the conformational flexibility. The SQV interactions with PR were very similar in the mutant complexes, consistent with the similar inhibition constants. The mutation from bigger to smaller amino acids allows more space to accommodate the large group at P1' of SQV, unlike the reduced interactions observed in darunavir complexes. The residues 79-82 have adjusted to accommodate the large hydrophobic groups of SQV, suggesting that these residues are intrinsically flexible and their conformation depends more on the nature of the inhibitor than on the mutations in this region. This analysis will assist with development of more effective antiviral inhibitors. Atomic resolution crystal structures of HIV-1 protease and mutants V82A and I84V with saquinavir.,Tie Y, Kovalevsky AY, Boross P, Wang YF, Ghosh AK, Tozser J, Harrison RW, Weber IT Proteins. 2007 Apr 1;67(1):232-42. PMID:17243183 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Virus protease

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