Sandbox Reserved 1502: Difference between revisions

The catalytic core domain contains three acidic residues, the D,D-35-E motif, comprising residues Asp64, Asp116, and Glu152. By analogy with models of catalysis by DNA polymerases (16-18), it has been proposed that coordination of divalent metal ion to these residues plays a key role in catalysis. The catalytic residues Asp64, Asp116, and Glu152of HIV-1 integrase and their counterparts in the ASV structures are in close proximity, coordinate divalent metal ion, and define the active site. However, the residues comprising the active site region exhibit considerable flexibility, suggesting that binding of DNA substrate is required to impose the precise configuration of residues that is required for catalysis.