A mutation at position 190 of human immunodeficiency virus type 1 reverse transcriptase interacts with mutations at positions 74 and 75 via the template primer

Antimicrob Agents Chemother. 1998 Feb;42(2):447-52. doi: 10.1128/AAC.42.2.447.


We have analyzed amino acid substitutions at position G190 in the reverse transcriptase (RT) of human immunodeficiency virus type 1 (HIV-1). The mutation G190E, which is responsible for resistance to certain nonnucleoside inhibitors, results in RT that has significantly less polymerase activity and that is less processive than wild-type RT. Its kinetic profile with respect to dGTP and poly(rC).oligo(dG) is significantly altered compared to that of wild-type RT. The combination of either of the mutations L74V or V75I with the G190E mutation appears to be compensatory and mitigates many of the deleterious effects of the G190E mutation.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • DNA Primers / genetics
  • Deoxyguanine Nucleotides / metabolism
  • Drug Resistance, Microbial / genetics
  • HIV Reverse Transcriptase / genetics*
  • HIV Reverse Transcriptase / metabolism
  • HIV-1 / enzymology*
  • Humans
  • Point Mutation*
  • Substrate Specificity
  • Templates, Genetic


  • DNA Primers
  • Deoxyguanine Nucleotides
  • deoxyguanosine triphosphate
  • HIV Reverse Transcriptase