2P4V

Crystal structure of the transcript cleavage factor, GreB at 2.6A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The carboxy-terminal coiled-coil of the RNA polymerase beta'-subunit is the main binding site for Gre factors.

Vassylyeva, M.N.Svetlov, V.Dearborn, A.D.Klyuyev, S.Artsimovitch, I.Vassylyev, D.G.

(2007) Embo Rep. 8: 1038-1043

  • DOI: 10.1038/sj.embor.7401079

  • PubMed Abstract: 
  • Bacterial Gre transcript cleavage factors stimulate the intrinsic endonucleolytic activity of RNA polymerase (RNAP) to rescue stalled transcription complexes. They bind to RNAP and extend their coiled-coil (CC) domains to the catalytic centre through ...

    Bacterial Gre transcript cleavage factors stimulate the intrinsic endonucleolytic activity of RNA polymerase (RNAP) to rescue stalled transcription complexes. They bind to RNAP and extend their coiled-coil (CC) domains to the catalytic centre through the secondary channel. Three existing models for the Gre-RNAP complex postulate congruent mechanisms of Gre-assisted catalysis, while offering conflicting views of the Gre-RNAP interactions. Here, we report the GreB structure of Escherichia coli. The GreB monomers form a triangle with the tip of the amino-terminal CC of one molecule trapped within the hydrophobic cavity of the carboxy-terminal domain of a second molecule. This arrangement suggests an analogous model for recruitment to RNAP. Indeed, the beta'-subunit CC located at the rim of the secondary channel has conserved hydrophobic residues at its tip. We show that substitutions of these residues and those in the GreB C-terminal domain cavity confer defects in GreB activity and binding to RNAP, and present a plausible model for the RNAP-GreB complex.


    Organizational Affiliation

    Department of Biochemistry and Molecular Genetics, Schools of Medicine and Dentistry, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transcription elongation factor greB
A, B, C, D, E, F
158Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: greB
Find proteins for P30128 (Escherichia coli (strain K12))
Go to UniProtKB:  P30128
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.226 
  • Space Group: P 43
Unit Cell:
Length (Å)Angle (°)
a = 148.320α = 90.00
b = 148.320β = 90.00
c = 116.770γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data scaling
HKL-2000data reduction
MLPHAREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance