A molecular clasp in the human immunodeficiency virus (HIV) type 1 TM protein determines the anti-HIV activity of gp41 derivatives: implication for viral fusion.

Published

Journal Article

We have previously reported that synthetic peptides representing the leucine zipper domain (DP107) and a second putative helical domain (DP178) of human immunodeficiency virus type 1 (HIV-1) gp41 exhibit potent anti-HIV activity. In this study we have used soluble recombinant forms of gp41 to provide evidence that the DP178 peptide and the DP178 region of gp41 associate with a distal site on the gp41 transmembrane protein whose interactive structure is influenced by the leucine zipper (DP107) motif. We also observed that a single coiled-coil-disrupting mutation in the leucine zipper domain transformed the recombinant gp41 protein from an inactive to an active inhibitor of HIV-1 fusion and infectivity, which may be related to that finding. We speculate that this transformation results from liberation of the potent DP178-related sequence from a molecular clasp with a leucine zipper, DP107, determinant. The results are discussed in the context of two distinct conformations for the gp41 molecule and possible involvement of these two domains in structural transitions associated with HIV-1-mediated fusion. The results are also interpreted to suggest that the anti-HIV activity of the various gp41 derivatives (peptides and recombinant proteins) may be due to their ability to form complexes with viral gp41 and interfere with its fusogenic processes.

Full Text

Duke Authors

Cited Authors

  • Chen, CH; Matthews, TJ; McDanal, CB; Bolognesi, DP; Greenberg, ML

Published Date

  • June 1995

Published In

Volume / Issue

  • 69 / 6

Start / End Page

  • 3771 - 3777

PubMed ID

  • 7538176

Pubmed Central ID

  • 7538176

Electronic International Standard Serial Number (EISSN)

  • 1098-5514

International Standard Serial Number (ISSN)

  • 0022-538X

Language

  • eng