5A9E

Cryo-electron tomography and subtomogram averaging of Rous-Sarcoma- Virus deltaMBD virus-like particles


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.7 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: TOMOGRAPHY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Structure of Immature-Like Rous Sarcoma Virus Gag Particles Reveals a Structural Role for the P10 Domain in Assembly.

Schur, F.K.M.Dick, R.A.Hagen, W.J.H.Vogt, V.M.Briggs, J.A.G.

(2015) J.Virol. 89: 10294

  • DOI: 10.1128/JVI.01502-15

  • PubMed Abstract: 
  • The polyprotein Gag is the primary structural component of retroviruses. Gag consists of independently folded domains connected by flexible linkers. Interactions between the conserved capsid (CA) domains of Gag mediate formation of hexameric protein ...

    The polyprotein Gag is the primary structural component of retroviruses. Gag consists of independently folded domains connected by flexible linkers. Interactions between the conserved capsid (CA) domains of Gag mediate formation of hexameric protein lattices that drive assembly of immature virus particles. Proteolytic cleavage of Gag by the viral protease (PR) is required for maturation of retroviruses from an immature form into an infectious form. Within the assembled Gag lattices of HIV-1 and Mason-Pfizer monkey virus (M-PMV), the C-terminal domain of CA adopts similar quaternary arrangements, while the N-terminal domain of CA is packed in very different manners. Here, we have used cryo-electron tomography and subtomogram averaging to study in vitro-assembled, immature virus-like Rous sarcoma virus (RSV) Gag particles and have determined the structure of CA and the surrounding regions to a resolution of ∼8 Å. We found that the C-terminal domain of RSV CA is arranged similarly to HIV-1 and M-PMV, whereas the N-terminal domain of CA adopts a novel arrangement in which the upstream p10 domain folds back into the CA lattice. In this position the cleavage site between CA and p10 appears to be inaccessible to PR. Below CA, an extended density is consistent with the presence of a six-helix bundle formed by the spacer-peptide region. We have also assessed the affect of lattice assembly on proteolytic processing by exogenous PR. The cleavage between p10 and CA is indeed inhibited in the assembled lattice, a finding consistent with structural regulation of proteolytic maturation.


    Organizational Affiliation

    Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany Molecular Medicine Partnership Unit, Heidelberg, Germany vmv1@cornell.edu john.briggs@embl.de.,Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USA.,Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USA vmv1@cornell.edu john.briggs@embl.de.,Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany.,Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany Molecular Medicine Partnership Unit, Heidelberg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DELTAMBD GAG PROTEIN
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R
495Rous 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: ELECTRON MICROSCOPY
  • Resolution: 7.7 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: TOMOGRAPHY 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-08-12
    Type: Initial release
  • Version 1.1: 2015-10-07
    Type: Database references, Derived calculations, Other
  • Version 1.2: 2017-08-02
    Type: Data collection