6EU0

RNA Polymerase III open pre-initiation complex (OC-PIC)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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


Literature

Structural basis of RNA polymerase III transcription initiation.

Abascal-Palacios, G., Ramsay, E.P., Beuron, F., Morris, E., Vannini, A.

(2018) Nature 553: 301-306

  • DOI: https://doi.org/10.1038/nature25441
  • Primary Citation of Related Structures:  
    6EU0, 6EU1, 6EU2, 6EU3

  • PubMed Abstract: 

    • RNA polymerase (Pol) III transcribes essential non-coding RNAs, including the entire pool of transfer RNAs, the 5S ribosomal RNA and the U6 spliceosomal RNA, and is often deregulated in cancer cells. The initiation of gene transcription by Pol III requires the activity of the transcription factor TFIIIB to form a transcriptionally active Pol III preinitiation complex (PIC) ...

    RNA polymerase (Pol) III transcribes essential non-coding RNAs, including the entire pool of transfer RNAs, the 5S ribosomal RNA and the U6 spliceosomal RNA, and is often deregulated in cancer cells. The initiation of gene transcription by Pol III requires the activity of the transcription factor TFIIIB to form a transcriptionally active Pol III preinitiation complex (PIC). Here we present electron microscopy reconstructions of Pol III PICs at 3.4-4.0 Å and a reconstruction of unbound apo-Pol III at 3.1 Å. TFIIIB fully encircles the DNA and restructures Pol III. In particular, binding of the TFIIIB subunit Bdp1 rearranges the Pol III-specific subunits C37 and C34, thereby promoting DNA opening. The unwound DNA directly contacts both sides of the Pol III cleft. Topologically, the Pol III PIC resembles the Pol II PIC, whereas the Pol I PIC is more divergent. The structures presented unravel the molecular mechanisms underlying the first steps of Pol III transcription and also the general conserved mechanisms of gene transcription initiation.

    Organizational Affiliation: 

    The Institute of Cancer Research, London SW7 3RP, UK.



Macromolecules

Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC1A1,460Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPO31, RPC1, RPC160, YOR116C, O3254, YOR3254C
EC: 2.7.7.6
UniProt
Find proteins for P04051 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P04051 
Go to UniProtKB:  P04051
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04051
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC2B1,149Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RET1, RPC128, RPC2, YOR207C
EC: 2.7.7.6
UniProt
Find proteins for P22276 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P22276 
Go to UniProtKB:  P22276
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP22276
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I and III subunit RPAC1C335Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC40, RPC5, YPR110C, P8283.18
UniProt
Find proteins for P07703 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P07703 
Go to UniProtKB:  P07703
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP07703
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC9D161Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC17, YJL011C, J1349
UniProt
Find proteins for P47076 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P47076 
Go to UniProtKB:  P47076
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP47076
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC1E215Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPB5, RPA7, RPC9, YBR154C, YBR1204
UniProt
Find proteins for P20434 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P20434 
Go to UniProtKB:  P20434
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP20434
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC2F155Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPO26, RPB6, YPR187W, P9677.8
UniProt
Find proteins for P20435 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P20435 
Go to UniProtKB:  P20435
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP20435
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC8G212Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC25, YKL144C, UNF1, YKL1
UniProt
Find proteins for P35718 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P35718 
Go to UniProtKB:  P35718
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35718
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC3H146Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPB8, YOR224C, YOR50-14
UniProt
Find proteins for P20436 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P20436 
Go to UniProtKB:  P20436
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP20436
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC10I110Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC11, YDR045C, YD9609.01C
UniProt
Find proteins for Q04307 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q04307 
Go to UniProtKB:  Q04307
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ04307
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC5J70Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPB10, YOR210W
UniProt
Find proteins for P22139 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P22139 
Go to UniProtKB:  P22139
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP22139
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I and III subunit RPAC2K142Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC19, YNL113W, N1937
UniProt
Find proteins for P28000 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P28000 
Go to UniProtKB:  P28000
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP28000
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerases I, II, and III subunit RPABC4L70Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC10, RPB12, YHR143W-A, YHR143BW
UniProt
Find proteins for P40422 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40422 
Go to UniProtKB:  P40422
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40422
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC5M282Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC37, YKR025W
UniProt
Find proteins for P36121 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P36121 
Go to UniProtKB:  P36121
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP36121
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC4N422Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC53, RPC4, YDL150W, D1557
UniProt
Find proteins for P25441 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P25441 
Go to UniProtKB:  P25441
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25441
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC3O654Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC82, RPC3, YPR190C, P9677.11
UniProt
Find proteins for P32349 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32349 
Go to UniProtKB:  P32349
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32349
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 16
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC6P317Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC34, YNR003C, N2031
UniProt
Find proteins for P32910 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32910 
Go to UniProtKB:  P32910
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32910
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 17
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase III subunit RPC7Q251Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: RPC31, ACP2, RPC8, YNL151C, N1769
UniProt
Find proteins for P17890 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P17890 
Go to UniProtKB:  P17890
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP17890
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 20
MoleculeChainsSequence LengthOrganismDetailsImage
Transcription factor TFIIIB component B''T [auth V]594Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: BDP1, TFC5, YNL039W, N2682
UniProt
Find proteins for P46678 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P46678 
Go to UniProtKB:  P46678
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP46678
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 21
MoleculeChainsSequence LengthOrganismDetailsImage
TATA-box-binding proteinU [auth Y]240Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SPT15, BTF1, TBP1, YER148W
UniProt
Find proteins for P13393 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P13393 
Go to UniProtKB:  P13393
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13393
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 22
MoleculeChainsSequence LengthOrganismDetailsImage
Transcription factor IIIB 70 kDa subunitV [auth Z]596Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: BRF1, PCF4, TDS4, YGR246C
UniProt
Find proteins for P29056 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P29056 
Go to UniProtKB:  P29056
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29056
Protein Feature View
Expand
  • Reference Sequence
Find similar nucleic acids by: 
(by identity cutoff)  |  3D Structure
Entity ID: 18
MoleculeChainsLengthOrganismImage
Non-TemplateR70Saccharomyces cerevisiae S288C
Protein Feature View
Expand
  • Reference Sequence
Find similar nucleic acids by: 
(by identity cutoff)  |  3D Structure
Entity ID: 19
MoleculeChainsLengthOrganismImage
TemplateS70Saccharomyces cerevisiae S288C
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION2.0.2
MODEL REFINEMENTPHENIX1.12-2829

Structure Validation

View Full Validation Report



View more in-depth experimental data
Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/K014390/1
Cancer Research UK Programme FoundationUnited KingdomCR-UK C47547/A21536
Wellcome TrustUnited Kingdom200818/Z/16/Z
Marie Sklodowska-Curie Intra-European FellowshipUnited Kingdom655238

Revision History  (Full details and data files)

  • Version 1.0: 2018-01-17
    Type: Initial release
  • Version 1.1: 2018-01-31
    Changes: Author supporting evidence, Database references
  • Version 1.2: 2019-12-11
    Changes: Other