Integrase mediates integration of a DNA copy of the viral genome into the host chromosome. Integrase is composed of three domains. This domain is the amino-terminal domain zinc binding domain. The central domain is the catalytic domain Pfam:PF00665. The carboxyl terminal domain is a DNA binding domain Pfam:PF00552.

1: Solution structure of the N-terminal zinc binding domain of HIV-1 integrase. Cai M, Zheng R, Caffrey M, Craigie R, Clore GM, Gronenborn AM; Nat Struct Biol 1997;4:567-577. PMID:9228950