2R5D image
Deposition Date 2007-09-03
Release Date 2007-10-02
Last Version Date 2024-10-30
Entry Detail
PDB ID:
2R5D
Title:
Structure of the gp41 N-trimer in complex with the HIV entry inhibitor PIE7
Biological Source:
Source Organism:
Method Details:
Experimental Method:
Resolution:
1.66 Å
R-Value Free:
0.24
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:gp41 N-peptide
Chain IDs:A, B, C
Chain Length:47
Number of Molecules:3
Biological Source:synthetic construct
Polymer Type:polypeptide(D)
Molecule:HIV entry inhibitor PIE7
Chain IDs:D (auth: H), E (auth: K), F (auth: L)
Chain Length:17
Number of Molecules:3
Biological Source:synthetic construct
Peptide-like Molecules
PRD_000281
Primary Citation
Potent D-peptide inhibitors of HIV-1 entry
Proc.Natl.Acad.Sci.Usa 104 16828 16833 (2007)
PMID: 17942675 DOI: 10.1073/pnas.0708109104

Abstact

During HIV-1 entry, the highly conserved gp41 N-trimer pocket region becomes transiently exposed and vulnerable to inhibition. Using mirror-image phage display and structure-assisted design, we have discovered protease-resistant D-amino acid peptides (D-peptides) that bind the N-trimer pocket with high affinity and potently inhibit viral entry. We also report high-resolution crystal structures of two of these D-peptides in complex with a pocket mimic that suggest sources of their high potency. A trimeric version of one of these peptides is the most potent pocket-specific entry inhibitor yet reported by three orders of magnitude (IC(50) = 250 pM). These results are the first demonstration that D-peptides can form specific and high-affinity interactions with natural protein targets and strengthen their promise as therapeutic agents. The D-peptides described here address limitations associated with current L-peptide entry inhibitors and are promising leads for the prevention and treatment of HIV/AIDS.

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