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A rapid and quantitative assay for inhibition of 3' cleavage activity of HIV-1 integrase.


Antiviral Res. 1997 Sep;36(1):27-33. Unique Identifier : AIDSLINE

The human immunodeficiency virus-1 (HIV-1) integrase catalyzes the specific removal of two nucleotides at either 3' end of each long terminal repeat (LTR) sequence of the proviral DNA duplex. The most commonly used in vitro assays for integrase employ 5' end 32P-labeled double-stranded oligonucleotides and the product of integrase-associated endonuclease activity is visualized by denaturing gel electrophoresis followed by autoradiography. We report here a simple assay system based upon the liberation of [35S]GT dinucleotide from the 3' end of a double-stranded U5 LTR sequence derived from HIV-1. The uncleaved labeled substrate and the unlabeled large product are removed by adsorption to polyethyleneimine cellulose followed by centrifugation. The small labeled GT dinucleotide product released in the supernatant is quantitated in terms of counts released as a function of time. Since the method is rapid and quantitative, it should be useful in the kinetic evaluation of inhibitors of the 3' cleavage activity of HIV-1 integrase.

*HIV Integrase/METABOLISM *HIV Integrase Inhibitors/PHARMACOLOGY


Information in this article was accurate in January 30, 1998. The state of the art may have changed since the publication date. This material is designed to support, not replace, the relationship that exists between you and your doctor. Always discuss treatment options with a doctor who specializes in treating HIV.