2CKZ

X-ray structure of RNA polymerase III subcomplex C17-C25.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural Biology of RNA Polymerase III: Subcomplex C17/-C25 X-Ray Structure and 11-Subunit Enzyme Model

Jasiak, A.J.Armache, K.-J.Martens, B.Jansen, R.-P.Cramer, P.

(2006) Mol.Cell 23: 71

  • DOI: 10.1016/j.molcel.2006.05.013

  • PubMed Abstract: 
  • We obtained an 11 subunit model of RNA polymerase (Pol) III by combining a homology model of the nine subunit core enzyme with a new X-ray structure of the subcomplex C17/25. Compared to Pol II, Pol III shows a conserved active center for RNA synthes ...

    We obtained an 11 subunit model of RNA polymerase (Pol) III by combining a homology model of the nine subunit core enzyme with a new X-ray structure of the subcomplex C17/25. Compared to Pol II, Pol III shows a conserved active center for RNA synthesis but a structurally different upstream face for specific initiation complex assembly during promoter selection. The Pol III upstream face includes a HRDC domain in subunit C17 that is translated by 35 A and rotated by 150 degrees compared to its Pol II counterpart. The HRDC domain is essential in vivo, folds independently in vitro, and, unlike other HRDC domains, shows no indication of nucleic acid binding. Thus, the HRDC domain is a functional module that could account for the role of C17 in Pol III promoter-specific initiation. During elongation, C17/25 may bind Pol III transcripts emerging from the adjacent exit pore, because the subcomplex binds to tRNA in vitro.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, Gene Center, Ludwig-Maximilians-University of Munich, Feodor-Lynen-Strasse 25, 81377 Munich, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE III 18 KD POLYPEPTIDE
A, C
161Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: RPC17
Find proteins for P47076 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P47076
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE III 25 KD POLYPEPTIDE
B, D
218Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: RPC25
Find proteins for P35718 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P35718
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.236 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 138.230α = 90.00
b = 138.230β = 90.00
c = 247.100γ = 120.00
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
SCALEPACKdata scaling
DENZOdata reduction
SnBphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-07-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-07-05
    Type: Refinement description