Crystal structures of catalytic core domain of BIV integrase: implications for the interaction between integrase and target DNAYao, X., Fang, S., Qiao, W., Geng, Y., Shen, Y.
(2010) Protein Cell 1: 363-370
- PubMed: 21203948
- DOI: 10.1007/s13238-010-0047-5
- Primary Citation of Related Structures:
- PubMed Abstract:
Integrase plays a critical role in the recombination of viral DNA into the host genome. Therefore, over the past decade, it has been a hot target of drug design in the fight against type 1 human immunodeficiency virus (HIV-1). Bovine immunodeficiency ...
Integrase plays a critical role in the recombination of viral DNA into the host genome. Therefore, over the past decade, it has been a hot target of drug design in the fight against type 1 human immunodeficiency virus (HIV-1). Bovine immunodeficiency virus (BIV) integrase has the same function as HIV-1 integrase. We have determined crystal structures of the BIV integrase catalytic core domain (CCD) in two different crystal forms at a resolution of 2.45 Å and 2.2 Å, respectively. In crystal form I, BIV integrase CCD forms a back-to-back dimer, in which the two active sites are on opposite sides. This has also been seen in many of the CCD structures of HIV-1 integrase that were determined previously. However, in crystal form II, BIV integrase CCD forms a novel face-to-face dimer in which the two active sites are close to each other. Strikingly, the distance separating the two active sites is approximately 20 Å, a distance that perfectly matches a 5-base pair interval. Based on these data, we propose a model for the interaction of integrase with its target DNA, which is also supported by many published biochemical data. Our results provide important clues for designing new inhibitors against HIV-1.
Tianjin Key Laboratory of Protein Science, College of Life Sciences, Nankai University, 94 Weijin Road, Tianjin, 300071, China.