4RQQ image
Deposition Date 2014-11-04
Release Date 2014-11-19
Last Version Date 2024-10-30
Entry Detail
PDB ID:
4RQQ
Keywords:
IMMUNE SYSTEM
Title:
Crystal structure of human Fab PGDM1400, a broadly reactive and potent HIV-1 neutralizing antibody
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
HOMO SAPIENS
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
3.10 Å
R-Value Free:
0.25
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 1 21 1
4RQQ validation report
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Human anti-HIV-1 antibody PGDM1400 heavy chain
Chain IDs:B (auth: H), D (auth: B), F (auth: D)
Chain Length:245
Number of Molecules:3
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Human anti-HIV-1 antibody PGDM1400 light chain
Chain IDs:A (auth: L), C (auth: A), E (auth: C)
Chain Length:219
Number of Molecules:3
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
TYS B TYR O-SULFO-L-TYROSINE
Ligand Molecules
NA
Primary Citation
Recombinant HIV envelope trimer selects for quaternary-dependent antibodies targeting the trimer apex.
Proc.Natl.Acad.Sci.USA 111 17624 17629 (2014)
PMID: 25422458 DOI: 10.1073/pnas.1415789111

Abstact

Broadly neutralizing antibodies (bnAbs) targeting the trimer apex of HIV envelope are favored candidates for vaccine design and immunotherapy because of their great neutralization breadth and potency. However, methods of isolating bnAbs against this site have been limited by the quaternary nature of the epitope region. Here we report the use of a recombinant HIV envelope trimer, BG505 SOSIP.664 gp140, as an affinity reagent to isolate quaternary-dependent bnAbs from the peripheral blood mononuclear cells of a chronically infected donor. The newly isolated bnAbs, named "PGDM1400-1412," show a wide range of neutralization breadth and potency. One of these variants, PGDM1400, is exceptionally broad and potent with cross-clade neutralization coverage of 83% at a median IC50 of 0.003 µg/mL. Overall, our results highlight the utility of BG505 SOSIP.664 gp140 as a tool for the isolation of quaternary-dependent antibodies and reveal a mosaic of antibody responses against the trimer apex within a clonal family.

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Protein

Chemical

Disease

Primary Citation of related structures
3U1S