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- PDB-7enc: TFIID-based PIC-Mediator holo-complex in fully-assembled state (h... -
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Basic information
Entry | Database: PDB / ID: 7enc | ||||||
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Title | TFIID-based PIC-Mediator holo-complex in fully-assembled state (hPIC-MED) | ||||||
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![]() | TRANSCRIPTION / mediator / preinitiation complex / transcription initiation | ||||||
Function / homology | ![]() positive regulation of T cell extravasation / negative regulation of smooth muscle cell differentiation / spermine transport / negative regulation of MHC class I biosynthetic process / enucleate erythrocyte development / positive regulation of type II interferon-mediated signaling pathway / regulation of RNA biosynthetic process / MMXD complex / core TFIIH complex portion of holo TFIIH complex / SAGA complex assembly ...positive regulation of T cell extravasation / negative regulation of smooth muscle cell differentiation / spermine transport / negative regulation of MHC class I biosynthetic process / enucleate erythrocyte development / positive regulation of type II interferon-mediated signaling pathway / regulation of RNA biosynthetic process / MMXD complex / core TFIIH complex portion of holo TFIIH complex / SAGA complex assembly / lateral mesodermal cell differentiation / androgen biosynthetic process / positive regulation of G0 to G1 transition / DNA-templated transcription open complex formation / allantois development / retinal pigment epithelium development / pre-snoRNP complex / mammary gland branching involved in thelarche / Cytosolic iron-sulfur cluster assembly / : / TFIIH-class transcription factor complex binding / G0 to G1 transition / central nervous system myelin formation / thyroid hormone receptor signaling pathway / negative regulation of protein autoubiquitination / positive regulation of core promoter binding / transcription factor TFTC complex / RNA polymerase II core complex assembly / meiotic sister chromatid cohesion / core mediator complex / positive regulation of mitotic recombination / negative regulation of MHC class II biosynthetic process / hair cell differentiation / hair follicle maturation / RNA polymerase I general transcription initiation factor activity / ventricular system development / regulation of cell cycle G1/S phase transition / RNA polymerase transcription factor SL1 complex / regulation of vitamin D receptor signaling pathway / nucleotide-excision repair factor 3 complex / transcription factor TFIIE complex / phosphatase activator activity / snRNA transcription by RNA polymerase II / nucleotide-excision repair, preincision complex assembly / SLIK (SAGA-like) complex / positive regulation of androgen receptor activity / CAK-ERCC2 complex / transcription factor TFIIK complex / transcription open complex formation at RNA polymerase II promoter / embryonic cleavage / RNA polymerase III general transcription initiation factor activity / nuclear retinoic acid receptor binding / UV protection / TFIIF-class transcription factor complex binding / hepatocyte differentiation / RNA polymerase I core promoter sequence-specific DNA binding / transcriptional start site selection at RNA polymerase II promoter / ventricular trabecula myocardium morphogenesis / thyroid hormone generation / transcription factor TFIIF complex / B-WICH complex positively regulates rRNA expression / RNA Polymerase I Transcription Initiation / RNA Polymerase I Promoter Escape / RNA Polymerase I Transcription Termination / RNA Polymerase III Transcription Initiation From Type 1 Promoter / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Polymerase III Transcription Initiation From Type 3 Promoter / positive regulation of response to cytokine stimulus / RNA Polymerase III Transcription Initiation From Type 1 Promoter / RNA Polymerase III Transcription Initiation From Type 2 Promoter / mediator complex / RNA Polymerase III Transcription Initiation From Type 3 Promoter / DNA 5'-3' helicase / positive regulation of keratinocyte differentiation / Generic Transcription Pathway / Formation of RNA Pol II elongation complex / Formation of the Early Elongation Complex / Transcriptional regulation by small RNAs / RNA Polymerase II Pre-transcription Events / TP53 Regulates Transcription of DNA Repair Genes / FGFR2 alternative splicing / RNA polymerase II transcribes snRNA genes / mRNA Capping / mRNA Splicing - Minor Pathway / Processing of Capped Intron-Containing Pre-mRNA / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Elongation / RNA Polymerase II Transcription Initiation And Promoter Clearance / RNA Pol II CTD phosphorylation and interaction with CE / Estrogen-dependent gene expression / Formation of TC-NER Pre-Incision Complex / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / mRNA Splicing - Major Pathway / maintenance of protein location in nucleus / RNA Polymerase III Abortive And Retractive Initiation / peroxisome proliferator activated receptor binding / transcription factor TFIIA complex Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.13 Å | ||||||
![]() | Chen, X. / Qi, Y. / Wang, X. / Wu, Z. / Yin, X. / Li, J. / Liu, W. / Xu, Y. | ||||||
![]() | ![]() Title: Structures of the human Mediator and Mediator-bound preinitiation complex. Authors: Xizi Chen / Xiaotong Yin / Jiabei Li / Zihan Wu / Yilun Qi / Xinxin Wang / Weida Liu / Yanhui Xu / ![]() Abstract: The 1.3-megadalton transcription factor IID (TFIID) is required for preinitiation complex (PIC) assembly and RNA polymerase II (Pol II)-mediated transcription initiation on almost all genes. The 26- ...The 1.3-megadalton transcription factor IID (TFIID) is required for preinitiation complex (PIC) assembly and RNA polymerase II (Pol II)-mediated transcription initiation on almost all genes. The 26-subunit Mediator stimulates transcription and cyclin-dependent kinase 7 (CDK7)-mediated phosphorylation of the Pol II C-terminal domain (CTD). We determined the structures of human Mediator in the Tail module-extended (at near-atomic resolution) and Tail-bent conformations and structures of TFIID-based PIC-Mediator (76 polypeptides, ~4.1 megadaltons) in four distinct conformations. PIC-Mediator assembly induces concerted reorganization (Head-tilting and Middle-down) of Mediator and creates a Head-Middle sandwich, which stabilizes two CTD segments and brings CTD to CDK7 for phosphorylation; this suggests a CTD-gating mechanism favorable for phosphorylation. The TFIID-based PIC architecture modulates Mediator organization and TFIIH stabilization, underscoring the importance of TFIID in orchestrating PIC-Mediator assembly. | ||||||
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 4 MB | Display | ![]() |
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-Validation report
Summary document | ![]() | 1.5 MB | Display | ![]() |
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Full document | ![]() | 1.7 MB | Display | |
Data in XML | ![]() | 420.4 KB | Display | |
Data in CIF | ![]() | 709.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 31207MC ![]() 7emfC ![]() 7enaC ![]() 7enjC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
+Mediator of RNA polymerase II transcription subunit ... , 23 types, 23 molecules amdfgrtjknqsuvzcebloiwx
+Isoform 2 of Mediator of RNA polymerase II transcription subunit ... , 2 types, 2 molecules hp
+Protein , 10 types, 10 molecules 089EADPDQPAPJPKPL
+General transcription factor IIH subunit ... , 5 types, 5 molecules 12345
+General transcription and DNA repair factor IIH helicase subunit ... , 2 types, 2 molecules 67
+Transcription initiation factor ... , 16 types, 22 molecules EBDADBDDDdDEDeDFDfDGDHDIDiDJDjDLDlDcDkDmDOBA
+General transcription factor IIF subunit ... , 2 types, 2 molecules FBFA
+DNA chain , 2 types, 2 molecules XY
+DNA-directed RNA ... , 8 types, 8 molecules PBPCPDPEPFPGPHPI
+Non-polymers , 3 types, 18 molecules 




+Details
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: TFIID-based PIC-Mediator holo-complex in fully-assembled state (hPIC-MED) Type: COMPLEX / Entity ID: #1-#70 / Source: MULTIPLE SOURCES |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 7.9 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
CTF correction | Type: NONE |
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3D reconstruction | Resolution: 4.13 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 67732 / Symmetry type: POINT |