4A3G

RNA Polymerase II initial transcribing complex with a 2nt DNA-RNA hybrid

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Structural basis of initial RNA polymerase II transcription.

Cheung, A.C., Sainsbury, S., Cramer, P.

(2011) EMBO J 30: 4755-4763

  • DOI: 10.1038/emboj.2011.396
  • Structures With Same Primary Citation

  • PubMed Abstract: 

    • During transcription initiation by RNA polymerase (Pol) II, a transient open promoter complex (OC) is converted to an initially transcribing complex (ITC) containing short RNAs, and to a stable elongation complex (EC). We report structures of a Pol I ...

    During transcription initiation by RNA polymerase (Pol) II, a transient open promoter complex (OC) is converted to an initially transcribing complex (ITC) containing short RNAs, and to a stable elongation complex (EC). We report structures of a Pol II-DNA complex mimicking part of the OC, and of complexes representing minimal ITCs with 2, 4, 5, 6, and 7 nucleotide (nt) RNAs, with and without a non-hydrolyzable nucleoside triphosphate (NTP) in the insertion site +1. The partial OC structure reveals that Pol II positions the melted template strand opposite the active site. The ITC-mimicking structures show that two invariant lysine residues anchor the 3'-proximal phosphate of short RNAs. Short DNA-RNA hybrids adopt a tilted conformation that excludes the +1 template nt from the active site. NTP binding induces complete DNA translocation and the standard hybrid conformation. Conserved NTP contacts indicate a universal mechanism of NTP selection. The essential residue Q1078 in the closed trigger loop binds the NTP 2'-OH group, explaining how the trigger loop couples catalysis to NTP selection, suppressing dNTP binding and DNA synthesis.

    Organizational Affiliation: 

    Gene Center and Department of Biochemistry, Center for Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians-Universität München, Munich, Germany.



Macromolecules

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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB9I122Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB11K120Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB1A1732Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 5J70Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 4L70Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB2B1224Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB3C318Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB4D221Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 1E215Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 2F155Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
RPB7, DNA-DIRECTED RNA POLYMERASE II SUBUNIT RPB7G171Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASES I, II, AND III SUBUNIT RPABC 3H146Saccharomyces cerevisiaeMutation(s): 0 
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  • Reference Sequence
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Entity ID: 13
MoleculeChainsLengthOrganism
NON TEMPLATE DNA 5'-D(*GP*GP*CP*AP*CP*AP*AP*CP*TP*GP*CP *GP*CP*TP)-3'N14Saccharomyces cerevisiae
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Entity ID: 14
MoleculeChainsLengthOrganism
TRANSCRIPT RNA 5'-R(*CP*AP)-3'P2Saccharomyces cerevisiae

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Entity ID: 15
MoleculeChainsLengthOrganism
TEMPLATE DNA 5'-D(*AP*GP*CP*GP*CP*AP*GP*TP*TP*GP*TP*GP *CP*TP*AP*TP*GP*AP*BRUP*AP*TP*TP*TP*TP*TP*AP*DT)-3'T27Saccharomyces cerevisiae
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
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A, B, C, I, J, L
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
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A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.166 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 220.67α = 90
b = 394.13β = 90
c = 282.74γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-08
    Type: Initial release
  • Version 1.1: 2014-03-19
    Changes: Other
  • Version 1.2: 2019-02-20
    Changes: Data collection, Database references, Derived calculations, Experimental preparation, Other, Source and taxonomy, Structure summary