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:  
    2AZ0, 2AZ2

  • 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 length and inhibits cleavage of dsRNA by Dicer in vitro ...

    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

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
B2 proteinC [auth A],
D [auth B]
73Flock House virusMutation(s): 0 
Gene Names: B2
UniProt
Find proteins for P68831 (Flock house virus)
Explore P68831 
Go to UniProtKB:  P68831
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68831
Protein Feature View
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  • Reference Sequence

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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'A [auth C],
B [auth D]
18N/A
Protein Feature View
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  • Reference Sequence
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

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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