title: In vitro HIV-1 LTR integration into T-cell activation gene CD27 segment and the decoy effect of modified-sequence DNA.
abstract: Integration into the host genome is an essential step in the HIV-1 life cycle. However, the host genome sequence that is favored by HIV-1 during integration has never been documented. Here, we report that CD27, a T cell activation gene, includes a sequence that is a target for in vitro HIV-1 cDNA integration. This sequence has a high affinity for integrase, and the target nucleotides responsible for this higher affinity were identified using a crystal microbalance assay. In experiments involving a segment of the CD27 gene, integration converged in the target nucleotides and flanking sequence DNA, indicating that integration is probably dependent upon the secondary structure of the substrate DNA. Notably, decoy modified CD27 sequence DNAs in which the target nucleotides were replaced suppressed integration when accompanying the original CD27 sequence DNA. Our identified CD27 sequence DNA is useful for investigating the biochemistry of integrase and for in vitro assessment of integrase-binding inhibitors.
authors.affiliation: Department of Pathology, Center for Anatomy, Pathology, and Forensic Medical Study, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
authors.forename: Rei
authors.initials: R
authors.lastname: Ohmori
authors.forename: Tatsuaki
authors.initials: T
authors.lastname: Tsuruyama
mesh_terms: D001483:Base Sequence; D002460:Cell Line; D016325:HIV Long Terminal Repeat / Q000235:genetics*; D015497:HIV-1 / Q000235:genetics* / Q000378:metabolism; D006801:Humans; D019426:Integrases / Q000378:metabolism; D011485:Protein Binding; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7 / Q000737:chemistry / Q000235:genetics*; D016662:Virus Integration
chemical_list: D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7; D019426:Integrases