2EIA

X-RAY CRYSTAL STRUCTURE OF EQUINE INFECTIOUS ANEMIA VIRUS (EIAV) CAPSID PROTEIN P26


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.236 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Model for lentivirus capsid core assembly based on crystal dimers of EIAV p26.

Jin, Z.Jin, L.Peterson, D.L.Lawson, C.L.

(1999) J Mol Biol 286: 83-93

  • DOI: 10.1006/jmbi.1998.2443
  • Primary Citation of Related Structures:  
    2EIA, 1EIA

  • PubMed Abstract: 
  • Two crystal forms of recombinant p26 capsid protein (CA) from the equine infectious anemia virus (EIAV) have in common an antiparallel four-helix bundle dimer interface between N-terminal domains (NTDs). The dimer interface provides a lenient scaffold to ...

    Two crystal forms of recombinant p26 capsid protein (CA) from the equine infectious anemia virus (EIAV) have in common an antiparallel four-helix bundle dimer interface between N-terminal domains (NTDs). The dimer interface provides a lenient scaffold to accommodate the wide sequence variation in these helices within lentivirus CA. Pairs of dimers weakly associate to form exact or approximate D2 symmetry tetramers. In one of the two crystal forms, the tetramers are linked via dimerization of C-terminal domains (CTDs). We propose that the observed NTD and CTD homodimer interactions are involved in the assembly of the lentivirus capsid. The NTD homodimer shape readily suggests a model for the mature capsid core, based on hexagonal packing with dimensions and surface topology resembling described EIAV capsid cores. Combining available data for human immunodeficiency virus and EIAV CA, we also propose an assembly pathway for maturation of the lentivirus capsid core following proteolytic cleavage of the gag polyprotein precursor.


    Related Citations: 
    • Cloning, Expression, Purification, and Characterization of the Major Core Protein (P26) from Equine Infectious Anemia Virus
      Birkett, A.J., Yelamos, B., Rodriguez-Crespo, I., Gavilanes, F., Peterson, D.L.
      (1997) Biochim Biophys Acta 1339: 62

    Organizational Affiliation

    Biology Department, Brookhaven National Laboratory, Upton, NY, 11973, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EIAV CAPSID PROTEIN P26 AB206Equine infectious anemia virusMutation(s): 0 
Gene Names: gag
Find proteins for P69732 (Equine infectious anemia virus (strain Wyoming))
Explore P69732 
Go to UniProtKB:  P69732
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.236 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.48α = 90
b = 100.48β = 90
c = 157.38γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
PHASESphasing
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-12-02
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance