2CWO

Crystal structure of RNA silencing suppressor p21 from Beet Yellows Virus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

RNA Silencing Suppressor p21 of Beet Yellows Virus Forms an RNA Binding Octameric Ring Structure

Ye, K.Patel, D.J.

(2005) STRUCTURE 13: 1375-1384

  • DOI: 10.1016/j.str.2005.06.017

  • PubMed Abstract: 
  • Many plant viruses encode proteins that suppress the antiviral RNA silencing response mounted by the host. The suppressors p19 from tombusvirus and p21 from Beet yellows virus appear to block silencing by directly binding siRNA, a critical mediator i ...

    Many plant viruses encode proteins that suppress the antiviral RNA silencing response mounted by the host. The suppressors p19 from tombusvirus and p21 from Beet yellows virus appear to block silencing by directly binding siRNA, a critical mediator in the process. Here, we report the crystal structure of p21, which reveals an octameric ring architecture with a large central cavity of approximately 90 A diameter. The all alpha-helical p21 monomer consists of N- and C-terminal domains that associate with their neighboring counterparts through symmetric head-to-head and tail-to-tail interactions. A putative RNA binding surface is identified in the conserved, positive-charged inner surface of the ring. In contrast to the specific p19-siRNA duplex interaction, p21 is a general nucleic acid binding protein, interacting with 21 nt or longer single- and double-stranded RNAs in vitro. This study reveals an RNA binding structure adopted by the p21 silencing suppressor.


    Organizational Affiliation

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RNA silencing suppressor
A, B, C, D
197Beet yellows virus (isolate Ukraine)Mutation(s): 0 
Find proteins for Q08545 (Beet yellows virus (isolate Ukraine))
Go to UniProtKB:  Q08545
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.210 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 199.633α = 90.00
b = 199.633β = 90.00
c = 56.122γ = 120.00
Software Package:
Software NamePurpose
CNSphasing
SCALEPACKdata scaling
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2005-06-22 
  • Released Date: 2005-10-11 
  • Deposition Author(s): Ye, K., Patel, D.J.

Revision History 

  • Version 1.0: 2005-10-11
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance