2P4V

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.230 

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
  • Primary Citation of Related Structures:  
    2P4V

  • 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 the secondary channel ...

    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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transcription elongation factor greB
A, B, C, D, E, F
A, B, C, D, E, F
158Escherichia coliMutation(s): 0 
Gene Names: greB
UniProt
Find proteins for P30128 (Escherichia coli (strain K12))
Explore P30128 
Go to UniProtKB:  P30128
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP30128
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: 0.257 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.230 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 148.32α = 90
b = 148.32β = 90
c = 116.77γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
MLPHAREphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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