4DGB image
Entry Detail
PDB ID:
4DGB
Title:
TRIMCyp cyclophilin domain from Macaca mulatta: HIV-2 CA cyclophilin-binding loop complex
Biological Source:
PDB Version:
Deposition Date:
2012-01-25
Release Date:
2012-02-08
Method Details:
Experimental Method:
Resolution:
1.70 Å
R-Value Free:
0.21
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:TRIMCyp
Chain IDs:A
Chain Length:165
Number of Molecules:1
Biological Source:Macaca mulatta
Polymer Type:polypeptide(L)
Description:capsid protein
Chain IDs:B
Chain Length:6
Number of Molecules:1
Biological Source:Human immunodeficiency virus 2
Primary Citation
Diverse HIV viruses are targeted by a conformationally dynamic antiviral.
Nat.Struct.Mol.Biol. 19 411 416 (2012)
PMID: 22407016 DOI: 10.1038/nsmb.2253

Abstact

Rhesus macaque TRIMCyp (RhTC) is a potent primate antiviral host protein that inhibits the replication of diverse HIV viruses. Here we show that it has acquired the ability to target multiple viruses by evolving an active site that interconverts between multiple conformations. Mutations that have relieved active site constraints allow RhTC to dynamically sample conformational space, including radically different conformers that target both HIV-1 and HIV-2 viruses. Introduction of a reversible constraint into RhTC allows specificity to be switched between a single conformation specific for HIV-1 and a dynamic ensemble that targets multiple viruses. These results show that conformational diversity can be used to expand the target diversity of innate immune receptors by supplementing their limited genetic variability with variability in protein structure.

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Primary Citation of related structures