7URN

Structure of HIV-1 capsid declination


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.43 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

A molecular switch modulates assembly and host factor binding of the HIV-1 capsid.

Schirra, R.T.Dos Santos, N.F.B.Zadrozny, K.K.Kucharska, I.Ganser-Pornillos, B.K.Pornillos, O.

(2023) Nat Struct Mol Biol 30: 383-390

  • DOI: https://doi.org/10.1038/s41594-022-00913-5
  • Primary Citation of Related Structures:  
    7URN, 7URT, 8EEP, 8EET, 8EJL

  • PubMed Abstract: 

    The HIV-1 capsid is a fullerene cone made of quasi-equivalent hexamers and pentamers of the viral CA protein. Typically, quasi-equivalent assembly of viral capsid subunits is controlled by a molecular switch. Here, we identify a Thr-Val-Gly-Gly motif that modulates CA hexamer/pentamer switching by folding into a 3 10 helix in the pentamer and random coil in the hexamer. Manipulating the coil/helix configuration of the motif allowed us to control pentamer and hexamer formation in a predictable manner, thus proving its function as a molecular switch. Importantly, the switch also remodels the common binding site for host factors that are critical for viral replication and the new ultra-potent HIV-1 inhibitor lenacapavir. This study reveals that a critical assembly element also modulates the post-assembly and viral replication functions of the HIV-1 capsid and provides new insights on capsid function and inhibition.


  • Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HIV-1 capsid protein231Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: Gag-pol
UniProt
Find proteins for P12493 (Human immunodeficiency virus type 1 group M subtype B (isolate NY5))
Explore P12493 
Go to UniProtKB:  P12493
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP12493
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.43 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARCv3.3.1
MODEL REFINEMENTPHENIX

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR21-AI167756
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesP50-AI150464

Revision History  (Full details and data files)

  • Version 1.0: 2023-02-15
    Type: Initial release
  • Version 1.1: 2023-02-22
    Changes: Database references
  • Version 1.2: 2023-03-29
    Changes: Database references
  • Version 2.0: 2024-05-15
    Changes: Atomic model, Data collection, Refinement description