6HLS

Yeast apo RNA polymerase I*


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.21 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The cryo-EM structure of a 12-subunit variant of RNA polymerase I reveals dissociation of the A49-A34.5 heterodimer and rearrangement of subunit A12.2.

Tafur, L.Sadian, Y.Hanske, J.Wetzel, R.Weis, F.Muller, C.W.

(2019) Elife 8

  • DOI: https://doi.org/10.7554/eLife.43204
  • Primary Citation of Related Structures:  
    6HKO, 6HLQ, 6HLR, 6HLS

  • PubMed Abstract: 

    RNA polymerase (Pol) I is a 14-subunit enzyme that solely transcribes pre-ribosomal RNA. Cryo-electron microscopy (EM) structures of Pol I initiation and elongation complexes have given first insights into the molecular mechanisms of Pol I transcription. Here, we present cryo-EM structures of yeast Pol I elongation complexes (ECs) bound to the nucleotide analog GMPCPP at 3.2 to 3.4 Å resolution that provide additional insight into the functional interplay between the Pol I-specific transcription-like factors A49-A34.5 and A12.2. Strikingly, most of the nucleotide-bound ECs lack the A49-A34.5 heterodimer and adopt a Pol II-like conformation, in which the A12.2 C-terminal domain is bound in a previously unobserved position at the A135 surface. Our structural and biochemical data suggest a mechanism where reversible binding of the A49-A34.5 heterodimer could contribute to the regulation of Pol I transcription initiation and elongation.


  • Organizational Affiliation

    Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase I subunit RPA1901,664Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 2.7.7.6
UniProt
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase I subunit RPA1351,203Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 2.7.7.6
UniProt
Find proteins for P22138 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I and III subunit RPAC1335Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase I subunit RPA14137Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for P50106 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC1215Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for P20434 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC2155Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase I subunit RPA43326Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC3146Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerase I subunit RPA12125Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC570Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I and III subunit RPAC2142Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC470Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.21 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION2
MODEL REFINEMENTPHENIX

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Research CouncilGermanyERC-2013-AdG340964-POL1PIC

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-03
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Other
  • Version 1.2: 2024-05-15
    Changes: Data collection, Database references, Refinement description