2P3J

Crystal structure of the Arg101Ala mutant protein of Rhesus rotavirus VP8*


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.163 

Starting Model: experimental
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This is version 1.5 of the entry. See complete history


Literature

Effects on sialic acid recognition of amino acid mutations in the carbohydrate-binding cleft of the rotavirus spike protein

Kraschnefski, M.J.Bugarcic, A.Fleming, F.E.Yu, X.von Itzstein, M.Coulson, B.S.Blanchard, H.

(2009) Glycobiology 19: 194-200

  • DOI: https://doi.org/10.1093/glycob/cwn119
  • Primary Citation of Related Structures:  
    2P3I, 2P3J, 2P3K

  • PubMed Abstract: 

    The rotavirus spike protein VP4 mediates attachment to host cells and subsequent membrane penetration. The VP8(*) domain of VP4 forms the spike tips and is proposed to recognize host-cell surface glycans. For sialidase-sensitive rotaviruses such as rhesus (RRV), this recognition involves terminal sialic acids. We show here that the RRV VP8(*)(64-224) protein competes with RRV infection of host cells, demonstrating its relevance to infection. In addition, we observe that the amino acids revealed by X-ray crystallography to be in direct contact with the bound sialic acid derivative methyl alpha-D-N-acetylneuraminide, and that are highly conserved amongst sialidase-sensitive rotaviruses, are residues that are also important in interactions with host-cell carbohydrates. Residues Arg101 and Ser190 of the RRV VP8(*) carbohydrate-binding site were mutated to assess their importance for binding to the sialic acid derivative and their competition with RRV infection of host cells. The crystallographic structure of the Arg(101)Ala mutant crystallized in the presence of the sialic acid derivative was determined at 295 K to a resolution of 1.9 A. Our multidisciplinary study using X-ray crystallography, saturation transfer difference nuclear magnetic resonance spectroscopy, isothermal titration calorimetry, and competitive virus infectivity assays to investigate RRV wild-type and mutant VP8(*) proteins has provided the first evidence that the carbohydrate-binding cavity in RRV VP8(*) is used for host-cell recognition, and this interaction is not only with the sialic acid portion but also with other parts of the glycan structure.


  • Organizational Affiliation

    Institute for Glycomics, Gold Coast Campus, Griffith University, Queensland 4222, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
VP4161Simian rotavirus A strain RRVMutation(s): 1 
UniProt
Find proteins for P12473 (Rotavirus A (strain RVA/Monkey/United States/RRV/1975/G3P5B[3]))
Explore P12473 
Go to UniProtKB:  P12473
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP12473
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.163 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.531α = 90
b = 48.531β = 90
c = 131.403γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PROTEUM PLUSdata collection
SAINTdata reduction
LSCALEdata scaling
AMoREphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-03-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-18
    Changes: Refinement description
  • Version 1.3: 2019-10-23
    Changes: Data collection, Database references
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.5: 2023-10-25
    Changes: Data collection, Database references, Refinement description, Structure summary