7Z1N image
Deposition Date 2022-02-24
Release Date 2022-08-31
Last Version Date 2024-07-17
Entry Detail
PDB ID:
7Z1N
Keywords:
TRANSCRIPTION
Title:
Structure of yeast RNA Polymerase III Delta C53-C37-C11
Biological Source:
Source Organism:
synthetic construct (Taxon ID: 32630)
Saccharomyces cerevisiae W303 (Taxon ID: 580240)
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.90 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
7Z1N validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase III subunit RPC1
Gene (Uniprot):RPO31
Chain IDs:A
Chain Length:1460
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P04051 Pfam ID:PF04997, PF00623, PF04983, PF05000, PF04998
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase III subunit RPC2
Gene (Uniprot):RET1
Chain IDs:B
Chain Length:1149
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P22276 Pfam ID:PF04563, PF04561, PF04565, PF04566, PF04567, PF00562, PF04560
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerases I and III subunit RPAC1
Gene (Uniprot):RPC40
Chain IDs:C
Chain Length:335
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P07703 Pfam ID:PF01193, PF01000
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase III subunit RPC9
Gene (Uniprot):RPC17
Chain IDs:D
Chain Length:161
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P47076 Pfam ID:PF03874
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerases I, II, and III subunit RPABC1
Gene (Uniprot):RPB5
Chain IDs:E
Chain Length:215
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P20434 Pfam ID:PF03871, PF01191
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerases I, II, and III subunit RPABC2
Gene (Uniprot):RPO26
Chain IDs:F
Chain Length:155
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P20435 Pfam ID:PF01192
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase III subunit RPC8
Gene (Uniprot):RPC25
Chain IDs:G
Chain Length:212
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P35718 Pfam ID:PF03876, PF08292
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerases I, II, and III subunit RPABC3
Gene (Uniprot):RPB8
Chain IDs:H
Chain Length:146
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P20436 Pfam ID:PF03870
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerases I, II, and III subunit RPABC5
Gene (Uniprot):RPB10
Chain IDs:I (auth: J)
Chain Length:70
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P22139 Pfam ID:PF01194
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerases I and III subunit RPAC2
Gene (Uniprot):RPC19
Chain IDs:J (auth: K)
Chain Length:142
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P28000 Pfam ID:PF13656
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerases I, II, and III subunit RPABC4
Gene (Uniprot):RPC10
Chain IDs:K (auth: L)
Chain Length:70
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P40422 Pfam ID:PF03604
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase III subunit RPC3
Gene (Uniprot):RPC82
Chain IDs:L (auth: O)
Chain Length:654
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P32349 Pfam ID:PF08221, PF05645, PF22536, PF20912
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase III subunit RPC6
Gene (Uniprot):RPC34
Chain IDs:M (auth: P)
Chain Length:317
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P32910 Pfam ID:PF05158
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase III subunit RPC7
Gene (Uniprot):RPC31
Chain IDs:N (auth: Q)
Chain Length:251
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae W303
UniProt ID:P17890 Pfam ID:PF11705
Polymer Type:polyribonucleotide
Molecule:RNA
Chain IDs:O (auth: R)
Chain Length:24
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polydeoxyribonucleotide
Molecule:NT-DNA
Chain IDs:P (auth: S)
Chain Length:44
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polydeoxyribonucleotide
Molecule:T-DNA
Chain IDs:Q (auth: T)
Chain Length:44
Number of Molecules:1
Biological Source:synthetic construct
Ligand Molecules
1N7
MG
ZN
Primary Citation
Architecture of the yeast Pol III pre-termination complex and pausing mechanism on poly(dT) termination signals.
Cell Rep 40 111316 111316 (2022)
PMID: 36070694 DOI: 10.1016/j.celrep.2022.111316

Abstact

RNA polymerase (Pol) III is specialized to transcribe short, abundant RNAs, for which it terminates transcription on polythymine (dT) stretches on the non-template (NT) strand. When Pol III reaches the termination signal, it pauses and forms the pre-termination complex (PTC). Here, we report cryoelectron microscopy (cryo-EM) structures of the yeast Pol III PTC and complementary functional states at resolutions of 2.7-3.9 Å. Pol III recognizes the poly(dT) termination signal with subunit C128 that forms a hydrogen-bond network with the NT strand and, thereby, induces pausing. Mutating key interacting residues interferes with transcription termination in vitro, impairs yeast growth, and causes global termination defects in vivo, confirming our structural results. Additional cryo-EM analysis reveals that C53-C37, a Pol III subcomplex and key termination factor, participates indirectly in Pol III termination. We propose a mechanistic model of Pol III transcription termination and rationalize why Pol III, unlike Pol I and Pol II, terminates on poly(dT) signals.

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Primary Citation of related structures
7Z1L
7Z1M