4yoa

Crsystal structure HIV-1 Protease MDR769 L33F Complexed with darunavirCrsystal structure HIV-1 Protease MDR769 L33F Complexed with darunavir

Structural highlights 4yoa is a 1 chain structure with sequence from Human immunodeficiency virus 1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.697Å Ligands: Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q5RTL1_9HIV1 Publication Abstract from PubMed HIV-1 protease (PR) is a 99 amino acid protein responsible for proteolytic processing of the viral polyprotein - an essential step in the HIV-1 life cycle. Drug resistance mutations in PR that are selected during antiretroviral therapy lead to reduced efficacy of protease inhibitors (PI) including darunavir (DRV). To identify the structural mechanisms associated with the DRV resistance mutation L33F, we performed X-ray crystallographic studies with a multi-drug resistant HIV-1 protease isolate that contains the L33F mutation (MDR769 L33F). In contrast to other PR L33F DRV complexes, the structure of MDR769 L33F complexed with DRV reported here displays the protease flaps in an open conformation. The L33F mutation increases noncovalent interactions in the hydrophobic pocket of the PR compared to the wild-type (WT) structure. As a result, L33F appears to act as a molecular anchor, reducing the flexibility of the 30s loop (residues 29-35) and the 80s loop (residues 79-84). Molecular anchoring of the 30s and 80s loops leaves an open S1/S1' subsite and distorts the conserved hydrogen-bonding network of DRV. These findings are consistent with previous reports despite structural differences with regards to flap conformation. The L33F darunavir resistance mutation acts as a molecular anchor reducing the flexibility of the HIV-1 protease 30s and 80s loops.,Kuiper BD, Keusch BJ, Dewdney TG, Chordia P, Ross K, Brunzelle JS, Kovari IA, MacArthur R, Salimnia H, Kovari LC Biochem Biophys Rep. 2015 Jun 12;2:160-165. doi: 10.1016/j.bbrep.2015.06.003., eCollection 2015 Jul. PMID:29124158 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Immunodeficiency virus protease 3D structures

spinqualitylabelsall models 4yoa, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image