3TJ1

Crystal Structure of RNA Polymerase I Transcription Initiation Factor Rrn3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Molecular basis of Rrn3-regulated RNA polymerase I initiation and cell growth.

Blattner, C.Jennebach, S.Herzog, F.Mayer, A.Cheung, A.C.Witte, G.Lorenzen, K.Hopfner, K.P.Heck, A.J.Aebersold, R.Cramer, P.

(2011) Genes Dev. 25: 2093-2105

  • DOI: 10.1101/gad.17363311

  • PubMed Abstract: 
  • Cell growth is regulated during RNA polymerase (Pol) I transcription initiation by the conserved factor Rrn3/TIF-IA in yeast/humans. Here we provide a structure-function analysis of Rrn3 based on a combination of structural biology with in vivo and i ...

    Cell growth is regulated during RNA polymerase (Pol) I transcription initiation by the conserved factor Rrn3/TIF-IA in yeast/humans. Here we provide a structure-function analysis of Rrn3 based on a combination of structural biology with in vivo and in vitro functional assays. The Rrn3 crystal structure reveals a unique HEAT repeat fold and a surface serine patch. Phosphorylation of this patch represses human Pol I transcription, and a phospho-mimetic patch mutation prevents Rrn3 binding to Pol I in vitro and reduces cell growth and Pol I gene occupancy in vivo. Cross-linking indicates that Rrn3 binds Pol I between its subcomplexes, AC40/19 and A14/43, which faces the serine patch. The corresponding region of Pol II binds the Mediator head that cooperates with transcription factor (TF) IIB. Consistent with this, the Rrn3-binding factor Rrn7 is predicted to be a TFIIB homolog. This reveals the molecular basis of Rrn3-regulated Pol I initiation and cell growth, and indicates a general architecture of eukaryotic transcription initiation complexes.


    Organizational Affiliation

    Gene Center, Department of Biochemistry, Center for Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians-Universit√§t M√ľnchen, 81377 Munich, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RNA polymerase I-specific transcription initiation factor RRN3
A, B
649Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RRN3
Find proteins for P36070 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: RRN3
Go to UniProtKB:  P36070
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.208 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 96.770α = 90.00
b = 101.770β = 90.00
c = 162.010γ = 90.00
Software Package:
Software NamePurpose
MxCuBEdata collection
SHARPphasing
BUSTERrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-09-28
    Type: Initial release
  • Version 1.1: 2011-10-05
    Type: Database references
  • Version 1.2: 2011-10-19
    Type: Database references
  • Version 1.3: 2018-01-24
    Type: Data collection, Structure summary