5I4T

Immature hexagonal lattice of HIV-1 Gag


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.27 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.250 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of an HIV assembly and maturation switch.

Wagner, J.M.Zadrozny, K.K.Chrustowicz, J.Purdy, M.D.Yeager, M.Ganser-Pornillos, B.K.Pornillos, O.

(2016) Elife 5

  • DOI: 10.7554/eLife.17063
  • Primary Citation of Related Structures:  
    5I4T

  • PubMed Abstract: 
  • Virus assembly and maturation proceed through the programmed operation of molecular switches, which trigger both local and global structural rearrangements to produce infectious particles. HIV-1 contains an assembly and maturation switch that spans the C-terminal domain (CTD) of the capsid (CA) region and the first spacer peptide (SP1) of the precursor structural protein, Gag ...

    Virus assembly and maturation proceed through the programmed operation of molecular switches, which trigger both local and global structural rearrangements to produce infectious particles. HIV-1 contains an assembly and maturation switch that spans the C-terminal domain (CTD) of the capsid (CA) region and the first spacer peptide (SP1) of the precursor structural protein, Gag. The crystal structure of the CTD-SP1 Gag fragment is a goblet-shaped hexamer in which the cup comprises the CTD and an ensuing type II β-turn, and the stem comprises a 6-helix bundle. The β-turn is critical for immature virus assembly and the 6-helix bundle regulates proteolysis during maturation. This bipartite character explains why the SP1 spacer is a critical element of HIV-1 Gag but is not a universal property of retroviruses. Our results also indicate that HIV-1 maturation inhibitors suppress unfolding of the CA-SP1 junction and thereby delay access of the viral protease to its substrate.


    Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CTD-SP1 fragment of HIV-1 GagA [auth G], B [auth H], C [auth I], D [auth J], E [auth K], F [auth L]110Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: gag
UniProt
Find proteins for Q72497 (Human immunodeficiency virus 1)
Explore Q72497 
Go to UniProtKB:  Q72497
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.27 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.250 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.959α = 90
b = 122.733β = 94.3
c = 85.414γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2016-07-27
    Type: Initial release
  • Version 1.1: 2017-09-20
    Changes: Author supporting evidence, Derived calculations
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence