Cited by 156HIV Research and TreatmentChemical Synthesis and AnalysisHIV/AIDS drug development and treatment

Inhibition of HIV Budding by a Genetically Selected Cyclic Peptide Targeting the Gag−TSG101 Interaction

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Tavassoli, Ali, Lu, Quan, Gam, Jongsik, Pan, Hui, Benkovic, Stephen J., Cohen, Stanley N.·2008·ACS Chemical Biology

Abstract

The egress of HIV particles from virus-infected cells is accomplished by the recruitment of proteins that normally mediate host cell endocytic functions. This process requires interaction of the HIV Gag protein with the host protein TSG101 (tumor susceptibility gene 101). Here, we report the use of a bacterial reverse two-hybrid system to identify cyclic peptides that interfere with the Gag-TSG101 interaction and the finding that a five amino acid peptide discovered by this approach can disrupt the interaction and consequently inhibit HIV egress. The inhibiting molecule, which was selected from a cyclic peptide library containing approximately 3.2 x 10(6) members, differs in primary sequence from the interacting sites of either TSG101 or Gag. Addition of cyclic peptide tagged with an HIV Tat sequence, which previously has been shown to enhance protein translocation across plasma membranes, to cultured human cells inhibited the production of virus-like particles (VLPs) by these cells (IC(50) of 7 microM), and this inhibition occurred in the absence of adverse affects on normal endocytic functions mediated by TSG101. A mutant Gag protein not dependent on TSG101 for release was unaffected by the cyclic peptide. Our findings, which suggest that interference with the TSG101-Gag interaction by cyclic peptides may be of practical use in the treatment of HIV infections, identify a specific cyclic peptide that reduces VLP release by this mechanism; they also demonstrate that the efficiency of interference with protein-protein interactions by cyclic peptides can be enhanced by tagging the peptides with translocation-promoting sequences. Collectively our results support the notion that small molecule therapeutics that inhibit specific interactions between viral and host proteins may have general applicability in antiviral therapy.

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Authors
Tavassoli, A., Lu, Q., Gam, J., Pan, H., Benkovic, S. J., & Cohen, S. N.
Affiliations
  • University of Southampton (GB)
  • Harvard University (US)
  • Pennsylvania State University (US)
  • Stanford Medicine (US)
Corresponding author
  • Benkovic, Stephen J.
  • Cohen, Stanley N.
Venue
ACS Chemical Biology
Published
2008-11-24
Volume
3
Issue
12
Pages
757-764
ISSN
  • 1554-8929 (ISSN-L)
  • 1554-8937
OpenAlex
W2052497243
Cited by
153
References
31
Citations by year
2026: 8 · 2025: 3 · 2024: 8 · 2023: 7 · 2022: 8 · 2021: 10 · 2020: 9 · 2019: 6 · 2018: 8 · 2017: 6 · 2016: 5 · 2015: 9 · 2014: 11 · 2013: 15 · 2012: 5
FWCI
4.06
Type
journal article
Language
en
Open access
Locations
  • ACS Chemical Biology (publishedVersion, other-oa)
  • PubMed (publishedVersion)
  • ePrints Soton (University of Southampton) (acceptedVersion)
Funders
  • Defense Advanced Research Projects Agency
  • Defense Threat Reduction Agency
Topics
  • Life Sciences › Immunology and Microbiology › Virology › HIV Research and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
  • Health Sciences › Medicine › Infectious Diseases › HIV/AIDS drug development and treatment
Keywords
HIV budding, cyclic peptides, protein-protein interaction inhibition, TSG101, HIV gag protein, virus-like particles, plasma membrane translocation, antiviral therapy, host-virus interaction
MeSH terms
Tsg101 Protein, Cells, Cultured, DNA-Binding Proteins, Escherichia coli, Humans, Ligands, Peptides, Cyclic, Protein Binding, Structure-Activity Relationship, Transcription Factors, Molecular Structure, HIV-1, Peptide Library, Anti-HIV Agents, Two-Hybrid System Techniques, gag Gene Products, Human Immunodeficiency Virus, Endosomal Sorting Complexes Required for Transport

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