5AFQ

Crystal structure of RPC62 - RPC32 beta


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 7 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.268 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Analysis of Human Rpc32Beta - Rpc62 Complex.

Boissier, F.Dumay-Odelot, H.Teichmann, M.Fribourg, S.

(2015) J.Struct.Biol. 192: 313

  • DOI: 10.1016/j.jsb.2015.09.004

  • PubMed Abstract: 
  • Transcription initiation by eukaryotic RNA polymerase (Pol) III relies on the subcomplex RPC62/RPC39/RPC32. Two distinct isoforms of RPC32 are encoded in the human genome. RPC32α expression is highly regulated and found only in stem cells and transfo ...

    Transcription initiation by eukaryotic RNA polymerase (Pol) III relies on the subcomplex RPC62/RPC39/RPC32. Two distinct isoforms of RPC32 are encoded in the human genome. RPC32α expression is highly regulated and found only in stem cells and transformed cells, whereas RPC32β is ubiquitously expressed in tissues. Here we identify a core-interacting domain of RPC32 sufficient for the interaction with RPC62. We present the crystal structure of a complex of RPC62 and the RPC32β core domain. RPC32β associates with the extended winged helix 1 and 2 and the coiled coil domain of RPC62 qualifying RPC32 as a molecular bridge in between RPC62 domains. The RPC62-RPC32 complex fit into EM data suggests a bi-functional role for RPC32 through interactions with the largest Pol III subunit and through solvent exposed residues. RPC32 positioning into Pol III suggests that subunit-specific contacts at the surface of the Pol III holoenzyme are critical for its function.


    Organizational Affiliation

    Université de Bordeaux, Institut Européen de Chimie et Biologie, ARNA Laboratory, F-33607 Pessac, France; Institut National de la Santé Et de la Recherche Médicale, INSERM - U869, ARNA Laboratory, F-33000 Bordeaux, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE III SUBUNIT RPC3
A, B
534Homo sapiensMutation(s): 0 
Gene Names: POLR3C
Find proteins for Q9BUI4 (Homo sapiens)
Go to Gene View: POLR3C
Go to UniProtKB:  Q9BUI4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
RPC32 BETA (RPC7L)
D, E
218N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
D, E
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 7 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.268 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 218.270α = 90.00
b = 218.270β = 90.00
c = 182.930γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2015-01-23 
  • Released Date: 2015-10-07 
  • Deposition Author(s): Fribourg, S.

Revision History 

  • Version 1.0: 2015-10-07
    Type: Initial release
  • Version 1.1: 2015-12-02
    Type: Database references