Download MendeleyThe catalytic domain of human immunodeficiency virus integrase: ordered active site in the F185H mutant.
Bujacz, G., Alexandratos, J., Qing, Z.L., Clement-Mella, C., Wlodawer, A.(1996) FEBS Lett 398: 175-178
- PubMed: 8977101
- DOI: https://doi.org/10.1016/s0014-5793(96)01236-7
- Primary Citation of Related Structures:
2ITG - PubMed Abstract:
We solved the structure and traced the complete active site of the catalytic domain of the human immunodeficiency virus type 1 integrase (HIV-1 IN) with the F185H mutation. The only previously available crystal structure, the F185K mutant of this domain, lacks one of the catalytically important residues, E152, located in a stretch of 12 disordered residues [Dyda et al. (1994) Science 266, 1981-1986]. It is clear, however, that the active site of HIV-1 IN observed in either structure cannot correspond to that of the functional enzyme, since the cluster of three conserved carboxylic acids does not create a proper metal-binding site. The conformation of the loop was compared with two different conformations found in the catalytic domain of the related avian sarcoma virus integrase [Bujacz et al. (1995) J. Mol. Biol. 253, 333-346]. Flexibility of the active site region of integrases may be required in order for the enzyme to assume a functional conformation in the presence of substrate and/or cofactors.
Organizational Affiliation:
Macromolecular Structure Laboratory, NCI-Frederick Cancer Research and Development Center, Frederick, MD 21702, USA.
