HIV-1 Gag immature lattice. GagSP1T8I

Experimental Data Snapshot

  • Resolution: 4.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SUBTOMOGRAM AVERAGING 

wwPDB Validation   3D Report Full Report

This is version 1.1 of the entry. See complete history


CryoET structures of immature HIV Gag reveal six-helix bundle.

Mendonca, L.Sun, D.Ning, J.Liu, J.Kotecha, A.Olek, M.Frosio, T.Fu, X.Himes, B.A.Kleinpeter, A.B.Freed, E.O.Zhou, J.Aiken, C.Zhang, P.

(2021) Commun Biol 4: 481-481

  • DOI: https://doi.org/10.1038/s42003-021-01999-1
  • Primary Citation of Related Structures:  
    7ASH, 7ASL

  • PubMed Abstract: 

    Gag is the HIV structural precursor protein which is cleaved by viral protease to produce mature infectious viruses. Gag is a polyprotein composed of MA (matrix), CA (capsid), SP1, NC (nucleocapsid), SP2 and p6 domains. SP1, together with the last eight residues of CA, have been hypothesized to form a six-helix bundle responsible for the higher-order multimerization of Gag necessary for HIV particle assembly. However, the structure of the complete six-helix bundle has been elusive. Here, we determined the structures of both Gag in vitro assemblies and Gag viral-like particles (VLPs) to 4.2 Å and 4.5 Å resolutions using cryo-electron tomography and subtomogram averaging by emClarity. A single amino acid mutation (T8I) in SP1 stabilizes the six-helix bundle, allowing to discern the entire CA-SP1 helix connecting to the NC domain. These structures provide a blueprint for future development of small molecule inhibitors that can lock SP1 in a stable helical conformation, interfere with virus maturation, and thus block HIV-1 infection.

  • Organizational Affiliation

    Electron Bio-Imaging Centre, Diamond Light Source, Harwell Science and Innovation Campus, Didcot, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gag protein235Human immunodeficiency virus 1Mutation(s): 1 
Gene Names: gag
Find proteins for P04591 (Human immunodeficiency virus type 1 group M subtype B (isolate HXB2))
Explore P04591 
Go to UniProtKB:  P04591
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04591
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 4.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SUBTOMOGRAM AVERAGING 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom206422/Z/17/Z

Revision History  (Full details and data files)

  • Version 1.0: 2021-06-23
    Type: Initial release
  • Version 1.1: 2022-03-23
    Changes: Database references