Mechanism of interaction of novel indolylarylsulfone derivatives with K103N and Y181I mutant HIV-1 reverse transcriptase in complex with its substrates

Antivir Chem Chemother. 2011 Nov 17;22(3):107-18. doi: 10.3851/IMP1855.


Background: Novel indolylarylsulfones (IASs), designed through rational structure-based molecular modelling and docking approaches, have been recently characterized as effective inhibitors of the wild-type and drug-resistant mutant HIV-1 reverse transcriptase (RT).

Methods: Here, we studied the interaction of selected halo- and nitro-substituted IAS derivatives, with the RT enzyme carrying the single resistance mutations K103N and Y181I through steady-state kinetic experiments.

Results: The studied compounds exhibited high selectivity to the mutant RT in complex with its substrates, behaving as uncompetitive inhibitors. The presence of the K103N mutation, and to a lesser extent the Y181I, stabilized the drug interactions with the viral RT, when both its substrates were bound.

Conclusions: The characterization of these mutation-specific effects on inhibitor binding might be relevant to the design of more effective new generation non-nucleoside reverse transcriptase inhibitors, with better resilience towards drug resistant mutants.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anti-HIV Agents / chemistry
  • Anti-HIV Agents / pharmacology*
  • Drug Resistance, Viral / drug effects
  • HIV Reverse Transcriptase / antagonists & inhibitors*
  • HIV Reverse Transcriptase / chemistry
  • HIV Reverse Transcriptase / genetics*
  • HIV Reverse Transcriptase / metabolism
  • HIV-1 / drug effects
  • HIV-1 / enzymology*
  • Humans
  • Models, Molecular
  • Mutation / genetics*
  • Reverse Transcriptase Inhibitors / chemistry
  • Reverse Transcriptase Inhibitors / pharmacology*
  • Structure-Activity Relationship
  • Substrate Specificity
  • Sulfones / chemistry
  • Sulfones / pharmacology*


  • Anti-HIV Agents
  • Reverse Transcriptase Inhibitors
  • Sulfones
  • reverse transcriptase, Human immunodeficiency virus 1
  • HIV Reverse Transcriptase