3LOB

Crystal Structure of Flock House Virus calcium mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Work: 0.347 
  • R-Value Observed: 0.347 

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This is version 2.0 of the entry. See complete history


Literature

Structure and function of a genetically engineered mimic of a nonenveloped virus entry intermediate.

Banerjee, M.Speir, J.A.Kwan, M.H.Huang, R.Aryanpur, P.P.Bothner, B.Johnson, J.E.

(2010) J Virol 84: 4737-4746

  • DOI: 10.1128/JVI.02670-09
  • Primary Citation of Related Structures:  
    3LOB

  • PubMed Abstract: 
  • Divalent metal ions are components of numerous icosahedral virus capsids. Flock House virus (FHV), a small RNA virus of the family Nodaviridae, was utilized as an accessible model system with which to address the effects of metal ions on capsid structure and on the biology of virus-host interactions ...

    Divalent metal ions are components of numerous icosahedral virus capsids. Flock House virus (FHV), a small RNA virus of the family Nodaviridae, was utilized as an accessible model system with which to address the effects of metal ions on capsid structure and on the biology of virus-host interactions. Mutations at the calcium-binding sites affected FHV capsid stability and drastically reduced virus infectivity, without altering the overall architecture of the capsid. The mutations also altered the conformation of gamma, a membrane-disrupting, virus-encoded peptide usually sequestered inside the capsid, by increasing its exposure under neutral pH conditions. Our data demonstrate that calcium binding is essential for maintaining a pH-based control on gamma exposure and host membrane disruption, and they reveal a novel rationale for the metal ion requirement during virus entry and infectivity. In the light of the phenotypes displayed by a calcium site mutant of FHV, we suggest that this mutant corresponds to an early entry intermediate formed in the endosomal pathway.


    Organizational Affiliation

    Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Coat protein betaA, B, C363Flock House virusMutation(s): 5 
Gene Names: alphaFlock House Virus coat protein alpha
EC: 3.4.23.44
UniProt
Find proteins for P12870 (Flock house virus)
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Go to UniProtKB:  P12870
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UniProt GroupP12870
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Coat protein gammaD, E, F44Flock House virusMutation(s): 0 
Gene Names: alphaFlock House Virus coat protein alpha
EC: 3.4.23.44
UniProt
Find proteins for P12870 (Flock house virus)
Explore P12870 
Go to UniProtKB:  P12870
Entity Groups  
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UniProt GroupP12870
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
RNA (5'-R(*UP*UP*U*AP*UP*CP*UP*(P))-3')G [auth R]8Spodoptera frugiperda
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Work: 0.347 
  • R-Value Observed: 0.347 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 477.088α = 90
b = 404.929β = 90.63
c = 476.189γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
GLRFphasing
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-04-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2021-10-13
    Changes: Database references, Derived calculations, Polymer sequence