2ONT

A swapped dimer of the HIV-1 capsid C-terminal domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.243 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Domain-swapped dimerization of the HIV-1 capsid C-terminal domain

Ivanov, D.Tsodikov, O.V.Kasanov, J.Ellenberger, T.Wagner, G.Collins, T.

(2007) Proc.Natl.Acad.Sci.Usa 104: 4353-4358

  • DOI: 10.1073/pnas.0609477104

  • PubMed Abstract: 
  • Assembly of the HIV and other retroviruses is primarily driven by the oligomerization of the Gag polyprotein, the major viral structural protein capable of forming virus-like particles even in the absence of all other virally encoded components. Seve ...

    Assembly of the HIV and other retroviruses is primarily driven by the oligomerization of the Gag polyprotein, the major viral structural protein capable of forming virus-like particles even in the absence of all other virally encoded components. Several critical determinants of Gag oligomerization are located in the C-terminal domain of the capsid protein (CA-CTD), which encompasses the most conserved segment in the highly variable Gag protein called the major homology region (MHR). The CA-CTD is thought to function as a dimerization module, although the existing model of CA-CTD dimerization does not readily explain why the conserved residues of the MHR are essential for retroviral assembly. Here we describe an x-ray structure of a distinct domain-swapped variant of the HIV-1 CA-CTD dimer stabilized by a single amino acid deletion. In the domain-swapped structure, the MHR-containing segment forms a major part of the dimerization interface, providing a structural mechanism for the enigmatic function of the MHR in HIV assembly. Our observations suggest that swapping of the MHR segments of adjacent Gag molecules may be a critical intermediate in retroviral assembly.


    Organizational Affiliation

    Department of Pathology, Children's Hospital Boston, 300 Longwood Avenue, Boston, MA 02115, USA. dmitri.ivanov@hms.harvard.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Capsid protein p24
A
76Human immunodeficiency virus 1Mutation(s): 0 
Gene Names: gag
Find proteins for Q9IVQ4 (Human immunodeficiency virus 1)
Go to UniProtKB:  Q9IVQ4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.243 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 40.129α = 90.00
b = 40.129β = 90.00
c = 105.322γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
ADSCdata collection
HKL-2000data reduction
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-02-20
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance