3FKI

12-Subunit RNA Polymerase II Refined with Zn-SAD data


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.88 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.282 
  • R-Value Observed: 0.283 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the 12-Subunit RNA Polymerase II Refined with the Aid of Anomalous Diffraction Data

Meyer, P.A.Ye, P.Suh, M.H.Zhang, M.Fu, J.

(2009) J Biol Chem 284: 12933-12939

  • DOI: https://doi.org/10.1074/jbc.M809199200
  • Primary Citation of Related Structures:  
    3FKI

  • PubMed Abstract: 

    RNA polymerase II (Pol II) is the central enzyme of eukaryotic gene expression machinery. Complete definition of the three-dimensional structure of Pol II is essential for understanding the mechanisms that regulate transcription via protein-protein interactions within the Pol II apparatus. To date a series of Pol II-related crystal structures have been reported. However, certain peptide regions, including several that are implicated to interact with regulatory factors, remain obscure. Here we describe conformations for two such regions that are close to the Pol II surface and assume seemingly flexible loop structures. One is located in the TFIIF-interacting Protrusion domain, whereas the other is in the TFIIE-interacting Clamp domain. This structural definition was aided by the application of an advanced crystallographic refinement approach that utilizes the single anomalous diffraction (SAD) from zinc ions bound intrinsically in Pol II. The SAD-based strategy allowed the 12-subunit Pol II model to be fully refined up to 3.8 A with excellent stereochemical properties, demonstrating the effectiveness of the SAD approach for the refinement of large structures at low-to-moderate resolutions. Our results also define additional components of the free Pol II, including the functionally critical Fork Loop-1 and Fork Loop-2 elements. As such, this refined Pol II model provides the most complete structural reference for future analyses of complex structures formed between Pol II and its regulatory factors.


  • Organizational Affiliation

    Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI 53226, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB11,733Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB21,224Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
UniProt
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB3318Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB4221Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC1215Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC2155Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB7171Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC3146Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB9122Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC570Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB11120Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC470Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.88 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.282 
  • R-Value Observed: 0.283 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 220.581α = 90
b = 391.537β = 90
c = 280.734γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description