2AZ2

Flock House virus B2-dsRNA Complex (P4122)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.246 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Dual modes of RNA-silencing suppression by Flock House virus protein B2.

Chao, J.A.Lee, J.H.Chapados, B.R.Debler, E.W.Schneemann, A.Williamson, J.R.

(2005) Nat Struct Mol Biol 12: 952-957

  • DOI: 10.1038/nsmb1005
  • Primary Citation of Related Structures:  
    2AZ2, 2AZ0

  • PubMed Abstract: 
  • As a counter-defense against antiviral RNA silencing during infection, the insect Flock House virus (FHV) expresses the silencing suppressor protein B2. Biochemical experiments show that B2 binds to double-stranded RNA (dsRNA) without regard to lengt ...

    As a counter-defense against antiviral RNA silencing during infection, the insect Flock House virus (FHV) expresses the silencing suppressor protein B2. Biochemical experiments show that B2 binds to double-stranded RNA (dsRNA) without regard to length and inhibits cleavage of dsRNA by Dicer in vitro. A cocrystal structure reveals that a B2 dimer forms a four-helix bundle that binds to one face of an A-form RNA duplex independently of sequence. These results suggest that B2 blocks both cleavage of the FHV genome by Dicer and incorporation of FHV small interfering RNAs into the RNA-induced silencing complex.


    Organizational Affiliation

    Department of Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, California 92037, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
B2 proteinAB73Flock House virusMutation(s): 0 
Gene Names: B2
Find proteins for P68831 (Flock house virus)
Explore P68831 
Go to UniProtKB:  P68831
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    5'-R(*GP*CP*AP*(5BU)P*GP*GP*AP*CP*GP*CP*GP*(5BU)P*CP*CP*AP*(5BU)P*GP*C)-3'C, D18N/A
    Experimental Data & Validation

    Experimental Data

    • Method: X-RAY DIFFRACTION
    • Resolution: 2.60 Å
    • R-Value Free: 0.265 
    • R-Value Work: 0.245 
    • R-Value Observed: 0.246 
    • Space Group: P 41 2 2
    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 69.625α = 90
    b = 69.625β = 90
    c = 154.633γ = 90
    Software Package:
    Software NamePurpose
    MOSFLMdata reduction
    SCALAdata scaling
    PHASERphasing
    CNSrefinement
    CCP4data scaling

    Structure Validation

    View Full Validation Report



    Entry History 

    Deposition Data

    Revision History 

    • Version 1.0: 2005-10-11
      Type: Initial release
    • Version 1.1: 2008-05-01
      Changes: Version format compliance
    • Version 1.2: 2011-07-13
      Changes: Version format compliance