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Updated: Aug 24, 2026

Isolation of Fidelity Variants of RNA Viruses and Characterization of Virus Mutation Frequency
Published on: June 16, 2011
Nucleoside-analog resistance mutations in HIV-1 reverse transcriptase and their influence on polymerase fidelity and
Lisa F Rezende1, Vinayaka R Prasad
1Department of Microbiology and Immunology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Golding Building 401, Bronx, NY 10461, USA.
Abstract:
Nucleoside-analog inhibitors of human immunodeficiency virus type 1 (HIV-1) reverse transcriptase (RT) were the first drugs used against the virus. It is long known that monotherapy with these and other drugs leads to the rapid development of viral resistance and it is being increasingly appreciated that a significant percentage of individuals receiving highly active antiretroviral therapy (HAART) also develop resistance. Considering the fact that RT is responsible both for optimal rate of replication and an accurate copying of the viral genome, the consequence of drug-resistance mutations in RT to the biochemistry of this enzyme and to the biology of the virus are critically important. The biochemistry of HIV-1 reverse transcriptase variants harboring nucleoside-analog resistance mutations has been studied extensively. In this review, we describe a number of studies into the polymerase fidelity of nucleoside-analog resistant HIV-1 reverse transcriptase as well as the mutation rate of HIV-1 harboring these mutations.
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