Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10767736 | Biochemical and Biophysical Research Communications | 2005 | 7 Pages |
Abstract
We have carried out a molecular dynamics (MD) simulation of full-length HIV-1 integrase (IN) dimer complexed with viral DNA with the aim of gaining information about the enzyme motion and investigating the movement of the catalytic flexible loop (residues 140-149) thought to be essential in the catalytic mechanism of IN. During the simulation, we observed quite a different behavior of this region in the presence or absence of the viral DNA. In particular, the MD results underline the crucial role of the residue Tyr143 in the mechanism of integration of viral DNA into the host chromosome. The present findings confirm the experimental data (e.g., site-directed mutagenesis experiments) showing that the loop is involved in the integration reactions and its mobility is correlated with the catalytic activity of HIV-1 integrase.
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Authors
Laura De Luca, Giulio Vistoli, Alessandro Pedretti, Maria Letizia Barreca, Alba Chimirri,