Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 19.16 kDa 
• Atom Count: 1446 
• Modelled Residue Count: 157 
• Deposited Residue Count: 164 
• Unique protein chains: 1

3NR5

Crystal structure of human Maf1

• PDB DOI: 10.2210/pdb3NR5/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-06-30 Released: 2010-10-13 
• Deposition Author(s): Ringel, R., Vannini, A., Kusser, A.G., Berninghausen, O., Kassavetis, G.A., Cramer, P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.211 
• R-Value Work: 0.188 
• R-Value Observed: 0.190 

Literature

Molecular Basis of RNA Polymerase III Transcription Repression by Maf1

Vannini, A., Ringel, R., Kusser, A.G., Berninghausen, O., Kassavetis, G.A., Cramer, P.

(2010) Cell 143: 59-70

• PubMed: 20887893 
• DOI: 10.1016/j.cell.2010.09.002
• Primary Citation of Related Structures:  
  3NR5


• PubMed Abstract: 
  

RNA polymerase III (Pol III) transcribes short RNAs required for cell growth. Under stress conditions, the conserved protein Maf1 rapidly represses Pol III transcription. We report the crystal structure of Maf1 and cryo-electron microscopic structures of Pol III, an active Pol III-DNA-RNA complex, and a repressive Pol III-Maf1 complex. Binding of DNA and RNA causes ordering of the Pol III-specific subcomplex C82/34/31 that is required for transcription initiation. Maf1 binds the Pol III clamp and rearranges C82/34/31 at the rim of the active center cleft. This impairs recruitment of Pol III to a complex of promoter DNA with the initiation factors Brf1 and TBP and thus prevents closed complex formation. Maf1 does however not impair binding of a DNA-RNA scaffold and RNA synthesis. These results explain how Maf1 specifically represses transcription initiation from Pol III promoters and indicate that Maf1 also prevents reinitiation by binding Pol III during transcription elongation.

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Organizational Affiliation: 

Gene Center and Department of Biochemistry, Center for Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians-Universität München, Feodor-Lynen-Strasse 25, 81377 Munich, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Repressor of RNA polymerase III transcription MAF1 homolog	A	164	Homo sapiens	Mutation(s): 0  Gene Names: MAF1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H063 (Homo sapiens) Explore Q9H063  Go to UniProtKB:  Q9H063
PHAROS:  Q9H063

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.211 
• R-Value Work: 0.188 
• R-Value Observed: 0.190 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.398	α = 90
b = 48.816	β = 90
c = 79.323	γ = 90

Software Package:

Software Name	Purpose
SOLVE	phasing
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-06-30 
• Released Date: 2010-10-13 
Deposition Author(s): Ringel, R., Vannini, A., Kusser, A.G., Berninghausen, O., Kassavetis, G.A., Cramer, P.

Revision History  

• Version 1.0: 2010-10-13
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance