Structure of a Spumaretrovirus Gag central domain reveals an ancient retroviral capsid

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 1000 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

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Structure of a Spumaretrovirus Gag Central Domain Reveals an Ancient Retroviral Capsid.

Ball, N.J.Nicastro, G.Dutta, M.Pollard, D.J.Goldstone, D.C.Sanz-Ramos, M.Ramos, A.Mullers, E.Stirnnagel, K.Stanke, N.Lindemann, D.Stoye, J.P.Taylor, W.R.Rosenthal, P.B.Taylor, I.A.

(2016) PLoS Pathog 12: e1005981-e1005981

  • DOI: https://doi.org/10.1371/journal.ppat.1005981
  • Primary Citation of Related Structures:  
    5M1G, 5M1H

  • PubMed Abstract: 

    The Spumaretrovirinae, or foamy viruses (FVs) are complex retroviruses that infect many species of monkey and ape. Despite little sequence homology, FV and orthoretroviral Gag proteins perform equivalent functions, including genome packaging, virion assembly, trafficking and membrane targeting. However, there is a paucity of structural information for FVs and it is unclear how disparate FV and orthoretroviral Gag molecules share the same function. To probe the functional overlap of FV and orthoretroviral Gag we have determined the structure of a central region of Gag from the Prototype FV (PFV). The structure comprises two all α-helical domains NtDCEN and CtDCEN that although they have no sequence similarity, we show they share the same core fold as the N- (NtDCA) and C-terminal domains (CtDCA) of archetypal orthoretroviral capsid protein (CA). Moreover, structural comparisons with orthoretroviral CA align PFV NtDCEN and CtDCEN with NtDCA and CtDCA respectively. Further in vitro and functional virological assays reveal that residues making inter-domain NtDCEN-CtDCEN interactions are required for PFV capsid assembly and that intact capsid is required for PFV reverse transcription. These data provide the first information that relates the Gag proteins of Spuma and Orthoretrovirinae and suggests a common ancestor for both lineages containing an ancient CA fold.

  • Organizational Affiliation

    Macromolecular Structure Laboratory, The Francis Crick Institute, Mill Hill Laboratory, London, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gag protein
A, B
99Human spumaretrovirusMutation(s): 0 
Gene Names: gag
Find proteins for P14349 (Human spumaretrovirus)
Explore P14349 
Go to UniProtKB:  P14349
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14349
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 1000 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-26
    Type: Initial release
  • Version 1.1: 2016-11-23
    Changes: Database references
  • Version 1.2: 2019-10-30
    Changes: Data collection, Database references
  • Version 1.3: 2024-05-15
    Changes: Data collection, Database references