3J1O image
Deposition Date 2012-03-29
Release Date 2013-03-06
Last Version Date 2024-02-21
Entry Detail
PDB ID:
3J1O
Keywords:
TRANSCRIPTION
Title:
Cryo-EM map of a yeast minimal preinitiation complex interacting with the Mediator Head module
Biological Source:
Source Organism:
Saccharomyces cerevisiae (Taxon ID: 4932)
Host Organism:
Trichoplusia ni
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
16.00 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
3J1O validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 11
Mutations:T16G, M17S
Chain IDs:A (auth: H)
Chain Length:131
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:Q99278 Pfam ID:PF10280
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 17
Gene (Uniprot):SRB4
Chain IDs:B (auth: I)
Chain Length:484
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P32569 Pfam ID:PF10156
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 8
Gene (Uniprot):MED8
Chain IDs:C (auth: J)
Chain Length:223
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P38304 Pfam ID:PF10232
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 22
Gene (Uniprot):SRB6
Chain IDs:D (auth: K)
Chain Length:121
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P32570 Pfam ID:PF06179
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 18
Gene (Uniprot):SRB5
Chain IDs:E (auth: L)
Chain Length:275
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P32585 Pfam ID:PF09637
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 20
Gene (Uniprot):SRB2
Chain IDs:F (auth: M)
Chain Length:210
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P34162 Pfam ID:PF08612
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Mediator of RNA polymerase II transcription subunit 6
Gene (Uniprot):MED6
Chain IDs:G (auth: N)
Chain Length:25
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P38782
Ligand Molecules
NA
Primary Citation
Interaction of the mediator head module with RNA polymerase II.
Structure 20 899 910 (2012)
PMID: 22579255 DOI: 10.1016/j.str.2012.02.023

Abstact

Mediator, a large (21 polypeptides, MW ∼1 MDa) complex conserved throughout eukaryotes, plays an essential role in control of gene expression by conveying regulatory signals that influence the activity of the preinitiation complex. However, the precise mode of interaction between Mediator and RNA polymerase II (RNAPII), and the mechanism of regulation by Mediator remain elusive. We used cryo-electron microscopy and reconstituted in vitro transcription assays to characterize a transcriptionally-active complex including the Mediator Head module and components of a minimum preinitiation complex (RNAPII, TFIIF, TFIIB, TBP, and promoter DNA). Our results reveal how the Head interacts with RNAPII, affecting its conformation and function.

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Primary Citation of related structures
3J1N