ISDA

Deposition Date 2002-12-30

Release Date 2003-02-25

Last Version Date 2024-05-22

Entry Detail

PDB ID:

1NIZ

Keywords:

VIRAL PROTEIN

Title:

NMR structure of a V3 (MN isolate) peptide bound to 447-52D, a human HIV-1 neutralizing antibody

Biological Source:

Source Organism:

Human immunodeficiency virus 1 (Taxon ID: 11676)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

SOLUTION NMR

Conformers Submitted:

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Exterior membrane glycoprotein(GP120)
Gene (Uniprot):env
Chain IDs:A
Chain Length:16
Number of Molecules:1
Biological Source:Human immunodeficiency virus 1

UniProt ID:P05877

Ligand Molecules

Primary Citation

Alternative Conformations of HIV-1 V3 Loops Mimic beta Hairpins in Chemokines, Suggesting a Mechanism for Coreceptor Selectivity.

Sharon, M, Kessler, N, Levy, R, Zolla-Pazner, S, Gorlach, M, Anglister, J.Show

Structure 11 225 236 (2003)

PMID: 12575942 DOI: 10.1016/S0969-2126(03)00011-X

Abstact

The V3 loop of the HIV-1 envelope glycoprotein gp120 is involved in binding to the CCR5 and CXCR4 coreceptors. The structure of an HIV-1(MN) V3 peptide bound to the Fv of the broadly neutralizing human monoclonal antibody 447-52D was solved by NMR and found to be a beta hairpin. This structure of V3(MN) was found to have conformation and sequence similarities to beta hairpins in CD8 and CCR5 ligands MIP-1alpha, MIP-1beta, and RANTES and differed from the beta hairpin of a V3(IIIB) peptide bound to the strain-specific murine anti-gp120(IIIB) antibody 0.5beta. In contrast to the structure of the bound V3(MN) peptide, the V3(IIIB) peptide resembles a beta hairpin in SDF-1, a CXCR4 ligand. These data suggest that the 447-52D-bound V3(MN) and the 0.5beta-bound V3(IIIB) structures represent alternative V3 conformations responsible for selective interactions with CCR5 and CXCR4, respectively.

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Primary Citation of related structures