1cxu

1.42A RESOLUTION ASV INTEGRASE CORE DOMAIN FROM CITRATE

spinqualitylabelsall models 1cxu, resolution 1.42Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1cxu is a 1 chain structure with sequence from Avian sarcoma virus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CIT, GOL Related: 1asv, 1cxq, 1cz9, 1czb Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [POL_RSVP] Capsid protein p27 forms the spherical core of the virus that encapsulates the genomic RNA-nucleocapsid complex (By similarity). The aspartyl protease mediates proteolytic cleavages of Gag and Gag-Pol polyproteins during or shortly after the release of the virion from the plasma membrane. Cleavages take place as an ordered, step-wise cascade to yield mature proteins. This process is called maturation. Displays maximal activity during the budding process just prior to particle release from the cell (By similarity). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Six crystal structures of the core domain of integrase (IN) from avian sarcoma virus (ASV) and its active-site derivative containing an Asp64 --> Asn substitution have been solved at atomic resolution ranging 1.02-1.42 A. The high-quality data provide new structural information about the active site of the enzyme and clarify previous inconsistencies in the description of this fragment. The very high resolution of the data and excellent quality of the refined models explain the dynamic properties of IN and the multiple conformations of its disordered residues. They also allow an accurate description of the solvent structure and help to locate other molecules bound to the enzyme. A detailed analysis of the flexible active-site region, in particular the loop formed by residues 144-154, suggests conformational changes which may be associated with substrate binding and enzymatic activity. The pH-dependent conformational changes of the active-site loop correlates with the pH vs activity profile observed for ASV IN. Atomic resolution structures of the core domain of avian sarcoma virus integrase and its D64N mutant.,Lubkowski J, Dauter Z, Yang F, Alexandratos J, Merkel G, Skalka AM, Wlodawer A Biochemistry. 1999 Oct 12;38(41):13512-22. PMID:10521258 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Retroviral integrase 3D structures

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