4BJJ

Sfc1-Sfc7 dimerization module


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

RNA Polymerase III-Specific General Transcription Factor Iiic Contains a Heterodimer Resembling Tfiif RAP30/RAP74.

Taylor, N.M.I.Baudin, F.Von Scheven, G.Muller, C.W.

(2013) Nucleic Acids Res. 41: 9183

  • DOI: 10.1093/nar/gkt664
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Transcription of tRNA-encoding genes by RNA polymerase (Pol) III requires the six-subunit general transcription factor IIIC that uses subcomplexes τA and τB to recognize two gene-internal promoter elements named A- and B-box. The Schizosaccharomyces ...

    Transcription of tRNA-encoding genes by RNA polymerase (Pol) III requires the six-subunit general transcription factor IIIC that uses subcomplexes τA and τB to recognize two gene-internal promoter elements named A- and B-box. The Schizosaccharomyces pombe τA subcomplex comprises subunits Sfc1, Sfc4 and Sfc7. The crystal structure of the Sfc1/Sfc7 heterodimer reveals similar domains and overall domain architecture to the Pol II-specific general transcription factor TFIIF Rap30/Rap74. The N-terminal Sfc1/Sfc7 dimerization module consists of a triple β-barrel similar to the N-terminal TFIIF Rap30/Rap74 dimerization module, whereas the C-terminal Sfc1 DNA-binding domain contains a winged-helix domain most similar to the TFIIF Rap30 C-terminal winged-helix domain. Sfc1 DNA-binding domain recognizes single and double-stranded DNA by an unknown mechanism. Several features observed for A-box recognition by τA resemble the recognition of promoters by bacterial RNA polymerase, where σ factor unfolds double-stranded DNA and stabilizes the non-coding DNA strand in an open conformation. Such a function has also been proposed for TFIIF, suggesting that the observed structural similarity between Sfc1/Sfc7 and TFIIF Rap30/Rap74 might also reflect similar functions.


    Organizational Affiliation

    European Molecular Biology Laboratory (EMBL), Structural and Computational Biology Unit, Meyerhofstrasse 1, 69117 Heidelberg, Germany and UJF-EMBL-CNRS UMI 3265, Unit of Virus Host-Cell Interactions, 38042 Grenoble Cedex 9, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSCRIPTION FACTOR TAU SUBUNIT SFC1
A
112Schizosaccharomyces pombe (strain 972 / ATCC 24843)Mutation(s): 3 
Gene Names: sfc1 (tfc1)
Find proteins for O14229 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Go to UniProtKB:  O14229
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRANSCRIPTION FACTOR TAU SUBUNIT SFC7
B
100Schizosaccharomyces pombe (strain 972 / ATCC 24843)Mutation(s): 0 
Gene Names: sfc7 (tfc7)
Find proteins for A6X980 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Go to UniProtKB:  A6X980
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download SDF File 
Download CCD File 
A, B
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.181 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 85.245α = 90.00
b = 85.245β = 90.00
c = 154.108γ = 120.00
Software Package:
Software NamePurpose
SHARPphasing
XDSdata reduction
SCALAdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-31
    Type: Initial release
  • Version 1.1: 2013-08-21
    Type: Database references, Other
  • Version 1.2: 2013-11-06
    Type: Database references