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Type: Journal article
Title: Antiviral activity of α-helical stapled peptides designed from the HIV-1 capsid dimerization domain
Other Titles: Antiviral activity of alpha-helical stapled peptides designed from the HIV-1 capsid dimerization domain
Author: Zhang, H.
Curreli, F.
Zhang, X.
Bhattacharya, S.
Waheed, A.
Cooper, A.
Cowburn, D.
Freed, E.
Debnath, A.
Citation: Retrovirology, 2011; 8(1):28
Publisher: BioMed Central
Issue Date: 2011
ISSN: 1742-4690
Statement of
Hongtao Zhang, Francesca Curreli, Xihui Zhang, Shibani Bhattacharya, Abdul A Waheed, Alan Cooper, David Cowburn, Eric O Freed and Asim K Debnath
Abstract: Background: The C-terminal domain (CTD) of HIV-1 capsid (CA), like full-length CA, forms dimers in solution and CTD dimerization is a major driving force in Gag assembly and maturation. Mutations of the residues at the CTD dimer interface impair virus assembly and render the virus non-infectious. Therefore, the CTD represents a potential target for designing anti-HIV-1 drugs. Results: Due to the pivotal role of the dimer interface, we reasoned that peptides from the a-helical region of the dimer interface might be effective as decoys to prevent CTD dimer formation. However, these small peptides do not have any structure in solution and they do not penetrate cells. Therefore, we used the hydrocarbon stapling technique to stabilize the a-helical structure and confirmed by confocal microscopy that this modification also made these peptides cell-penetrating. We also confirmed by using isothermal titration calorimetry (ITC), sedimentation equilibrium and NMR that these peptides indeed disrupt dimer formation. In in vitro assembly assays, the peptides inhibited mature-like virus particle formation and specifically inhibited HIV-1 production in cell-based assays. These peptides also showed potent antiviral activity against a large panel of laboratory-adapted and primary isolates, including viral strains resistant to inhibitors of reverse transcriptase and protease. Conclusions: These preliminary data serve as the foundation for designing small, stable, a-helical peptides and small-molecule inhibitors targeted against the CTD dimer interface. The observation that relatively weak CA binders, such as NYAD-201 and NYAD-202, showed specificity and are able to disrupt the CTD dimer is encouraging for further exploration of a much broader class of antiviral compounds targeting CA. We cannot exclude the possibility that the CA-based peptides described here could elicit additional effects on virus replication not directly linked to their ability to bind CA-CTD.
Description: Extent: 18p.
Rights: © 2011 Zhang et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
RMID: 0030000971
DOI: 10.1186/1742-4690-8-28
Appears in Collections:IPAS publications
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