3PO2

Arrested RNA Polymerase II elongation complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.154 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of RNA polymerase II backtracking, arrest and reactivation.

Cheung, A.C.Cramer, P.

(2011) Nature 471: 249-253

  • DOI: 10.1038/nature09785
  • Primary Citation of Related Structures:  
    3PO2, 3PO3

  • PubMed Abstract: 
  • During gene transcription, RNA polymerase (Pol) II moves forwards along DNA and synthesizes messenger RNA. However, at certain DNA sequences, Pol II moves backwards, and such backtracking can arrest transcription. Arrested Pol II is reactivated by transcription factor IIS (TFIIS), which induces RNA cleavage that is required for cell viability ...

    During gene transcription, RNA polymerase (Pol) II moves forwards along DNA and synthesizes messenger RNA. However, at certain DNA sequences, Pol II moves backwards, and such backtracking can arrest transcription. Arrested Pol II is reactivated by transcription factor IIS (TFIIS), which induces RNA cleavage that is required for cell viability. Pol II arrest and reactivation are involved in transcription through nucleosomes and in promoter-proximal gene regulation. Here we present X-ray structures at 3.3 Å resolution of an arrested Saccharomyces cerevisiae Pol II complex with DNA and RNA, and of a reactivation intermediate that additionally contains TFIIS. In the arrested complex, eight nucleotides of backtracked RNA bind a conserved 'backtrack site' in the Pol II pore and funnel, trapping the active centre trigger loop and inhibiting mRNA elongation. In the reactivation intermediate, TFIIS locks the trigger loop away from backtracked RNA, displaces RNA from the backtrack site, and complements the polymerase active site with a basic and two acidic residues that may catalyse proton transfers during RNA cleavage. The active site is demarcated from the backtrack site by a 'gating tyrosine' residue that probably delimits backtracking. These results establish the structural basis of Pol II backtracking, arrest and reactivation, and provide a framework for analysing gene regulation during transcription elongation.


    Organizational Affiliation

    Department of Biochemistry, Ludwig-Maximilians-Universität München, Feodor-Lynen-Str. 25, 81377 Munich, Germany.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB1A1733Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB2B1224Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Find proteins for P08518 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB3C318Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
UniProt
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB4D221Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC1E215Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC2F155Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB7G171Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC3H146Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB9I122Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 10
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DNA-directed RNA polymerases I, II, and III subunit RPABC5J70Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
UniProt
Find proteins for P22139 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase II subunit RPB11K120Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC4L70Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.7.7.6
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Entity ID: 13
MoleculeChainsLengthOrganismImage
DNA non-template strandM [auth N]14N/A
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Entity ID: 14
MoleculeChainsLengthOrganismImage
RNA product strandN [auth P]15N/A
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Entity ID: 15
MoleculeChainsLengthOrganismImage
DNA template strandO [auth T]27N/A
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Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

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V [auth D]4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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W [auth G]DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

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AA [auth L],
P [auth A],
Q [auth A],
T [auth B],
U [auth C],
AA [auth L],
P [auth A],
Q [auth A],
T [auth B],
U [auth C],
X [auth I],
Y [auth I],
Z [auth J]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

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S [auth A]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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R [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.154 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 224.57α = 90
b = 394.55β = 90
c = 282.14γ = 90
Software Package:
Software NamePurpose
RemDAqdata collection
PHASERphasing
BUSTERrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-03-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-08
    Changes: Refinement description