2AZ0

Flock House virus B2-dsRNA Complex (P212121)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.241 

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:  

  • 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: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
B2 protein
A, B
73Flock house virusMutation(s): 0 
Gene Names: B2
Find proteins for P68831 (Flock house virus)
Go to UniProtKB:  P68831
Entity ID: 1
MoleculeChainsLengthOrganism
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
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
5BU
Query on 5BU
C, D
RNA LINKINGC9 H12 Br N2 O9 PU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.241 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 50.261α = 90.00
b = 86.232β = 90.00
c = 94.338γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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