Solution structure of VPg of porcine sapovirus

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

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Solution structure of the porcine sapovirus VPg core reveals a stable three-helical bundle with a conserved surface patch.

Hwang, H.J.Min, H.J.Yun, H.Pelton, J.G.Wemmer, D.E.Cho, K.O.Kim, J.S.Lee, C.W.

(2015) Biochem Biophys Res Commun 459: 610-616

  • DOI: https://doi.org/10.1016/j.bbrc.2015.02.156
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Viral protein genome-linked (VPg) proteins play a critical role in the life cycle of vertebrate and plant positive-sense RNA viruses by acting as a protein primer for genome replication and as a protein cap for translation initiation. Here we report the solution structure of the porcine sapovirus VPg core (VPg(C)) determined by multi-dimensional NMR spectroscopy. The structure of VPg(C) is composed of three α-helices stabilized by several conserved hydrophobic residues that form a helical bundle core similar to that of feline calicivirus VPg. The putative nucleotide acceptor Tyr956 within the first helix of the core is completely exposed to solvent accessible surface to facilitate nucleotidylation by viral RNA polymerase. Comparison of VPg structures suggests that the surface for nucleotidylation site is highly conserved among the Caliciviridae family, whereas the backbone core structures are different. These structural features suggest that caliciviruses share common mechanisms of VPg-dependent viral replication and translation.

  • Organizational Affiliation

    Department of Chemistry, Chonnam National University, Gwangju 500-757, Republic of Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Viral protein genome-linked62Porcine enteric sapovirusMutation(s): 0 
Gene Names: ORF1
Find proteins for Q9QEJ5 (Porcine enteric sapovirus (isolate Swine/United States/Cowden/1980))
Explore Q9QEJ5 
Go to UniProtKB:  Q9QEJ5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9QEJ5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-04-15
    Type: Initial release
  • Version 1.1: 2023-06-14
    Changes: Data collection, Database references, Other