Crystal structure of t131 N-terminal TPR array

Experimental Data Snapshot

  • Resolution: 3.15 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.252 

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Architecture of TFIIIC and its role in RNA polymerase III pre-initiation complex assembly.

Male, G.von Appen, A.Glatt, S.Taylor, N.M.Cristovao, M.Groetsch, H.Beck, M.Muller, C.W.

(2015) Nat Commun 6: 7387-7387

  • DOI: https://doi.org/10.1038/ncomms8387
  • Primary Citation of Related Structures:  
    5AEM, 5AIM, 5AIO

  • PubMed Abstract: 

    In eukaryotes, RNA Polymerase III (Pol III) is specifically responsible for transcribing genes encoding tRNAs and other short non-coding RNAs. The recruitment of Pol III to tRNA-encoding genes requires the transcription factors (TF) IIIB and IIIC. TFIIIC has been described as a conserved, multi-subunit protein complex composed of two subcomplexes, called τA and τB. How these two subcomplexes are linked and how their interaction affects the formation of the Pol III pre-initiation complex (PIC) is poorly understood. Here we use chemical crosslinking mass spectrometry and determine the molecular architecture of TFIIIC. We further report the crystal structure of the essential TPR array from τA subunit τ131 and characterize its interaction with a central region of τB subunit τ138. The identified τ131-τ138 interacting region is essential in vivo and overlaps with TFIIIB-binding sites, revealing a crucial interaction platform for the regulation of tRNA transcription initiation.

  • Organizational Affiliation

    European Molecular Biology Laboratory (EMBL), Structural and Computational Biology Unit, Meyerhofstrasse 1, Heidelberg 69117, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TRANSCRIPTION FACTOR TAU 131 KDA SUBUNIT448Saccharomyces cerevisiaeMutation(s): 0 
Find proteins for P33339 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P33339 
Go to UniProtKB:  P33339
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP33339
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.15 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.252 
  • Space Group: P 62
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.36α = 90
b = 116.36β = 90
c = 95.98γ = 120
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-06-24
    Type: Initial release
  • Version 2.0: 2018-02-14
    Changes: Advisory, Atomic model, Data collection, Database references