3M8L

Crystal Structure Analysis of the Feline Calicivirus Capsid Protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.370 
  • R-Value Work: 0.390 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Conformational changes in the capsid of a calicivirus upon interaction with its functional receptor

Ossiboff, R.J.Zhou, Y.Lightfoot, P.J.Prasad, B.V.Parker, J.S.

(2010) J.Virol. 84: 5550-5564

  • DOI: 10.1128/JVI.02371-09

  • PubMed Abstract: 
  • Nonenveloped viral capsids are metastable structures that undergo conformational changes during virus entry that lead to interactions of the capsid or capsid fragments with the cell membrane. For members of the Caliciviridae, neither the nature of th ...

    Nonenveloped viral capsids are metastable structures that undergo conformational changes during virus entry that lead to interactions of the capsid or capsid fragments with the cell membrane. For members of the Caliciviridae, neither the nature of these structural changes in the capsid nor the factor(s) responsible for inducing these changes is known. Feline junctional adhesion molecule A (fJAM-A) mediates the attachment and infectious viral entry of feline calicivirus (FCV). Here, we show that the infectivity of some FCV isolates is neutralized following incubation with the soluble receptor at 37 degrees C. We used this property to select mutants resistant to preincubation with the soluble receptor. We isolated and sequenced 24 soluble receptor-resistant (srr) mutants and characterized the growth properties and receptor-binding activities of eight mutants. The location of the mutations within the capsid structure of FCV was mapped using a new 3.6-A structure of native FCV. The srr mutations mapped to the surface of the P2 domain were buried at the protruding domain dimer interface or were present in inaccessible regions of the capsid protein. Coupled with data showing that both the parental FCV and the srr mutants underwent increases in hydrophobicity upon incubation with the soluble receptor at 37 degrees C, these findings indicate that FCV likely undergoes conformational change upon interaction with its receptor. Changes in FCV capsid conformation following its interaction with fJAM-A may be important for subsequent interactions of the capsid with cellular membranes, membrane penetration, and genome delivery.


    Organizational Affiliation

    Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Hungerford Hill Road, Ithaca, NY 14853, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Capsid protein
A, B, C
534Feline calicivirusMutation(s): 0 
Find proteins for A2T4Q0 (Feline calicivirus)
Go to UniProtKB:  A2T4Q0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.370 
  • R-Value Work: 0.390 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 427.080α = 90.00
b = 450.726β = 90.00
c = 467.586γ = 90.00
Software Package:
Software NamePurpose
RAVEphasing
CNSrefinement
d*TREKdata scaling
HKL-3000data collection
RAVEmodel building
d*TREKdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-06-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 2.0: 2017-06-28
    Type: Advisory, Atomic model, Database references, Derived calculations, Other, Polymer sequence, Source and taxonomy, Structure summary