3G1G

Crystal structure of the C-terminal domain from the Rous Sarcoma Virus capsid protein: High pH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Proton-linked dimerization of a retroviral capsid protein initiates capsid assembly

Bailey, G.D.Hyun, J.K.Mitra, A.K.Kingston, R.L.

(2009) Structure 17: 737-748

  • DOI: 10.1016/j.str.2009.03.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In mature retroviral particles, the capsid protein (CA) forms a shell encasing the viral replication complex. Human immunodeficiency virus (HIV) CA dimerizes in solution, through its C-terminal domain (CTD), and this interaction is important for caps ...

    In mature retroviral particles, the capsid protein (CA) forms a shell encasing the viral replication complex. Human immunodeficiency virus (HIV) CA dimerizes in solution, through its C-terminal domain (CTD), and this interaction is important for capsid assembly. In contrast, other retroviral capsid proteins, including that of Rous sarcoma virus (RSV), do not dimerize with measurable affinity. Here we show, using X-ray crystallography and other biophysical methods, that acidification causes RSV CA to dimerize in a fashion analogous to HIV CA, and that this drives capsid assembly in vitro. A pair of aspartic acid residues, located within the CTD dimer interface, explains why dimerization is linked to proton binding. Our results show that despite overarching structural similarities, the intermolecular forces responsible for forming and stabilizing the retroviral capsid differ markedly across retroviral genera. Our data further suggest that proton binding may regulate RSV capsid assembly, or modulate stability of the assembled capsid.


    Organizational Affiliation

    School of Biological Sciences, University of Auckland, Auckland, New Zealand.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Gag polyprotein
A, B
87Rous sarcoma virus (strain Prague C)Mutation(s): 0 
Gene Names: gag
Find proteins for P03322 (Rous sarcoma virus (strain Prague C))
Go to UniProtKB:  P03322
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.217 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 46.600α = 90.00
b = 72.200β = 90.00
c = 48.000γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
BOSdata collection
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2009-01-29 
  • Released Date: 2009-06-02 
  • Deposition Author(s): Kingston, R.L.

Revision History 

  • Version 1.0: 2009-06-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance