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Yorodumi- 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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Keywords | TRANSCRIPTION / mediator / preinitiation complex / transcription initiation | ||||||
| Function / homology | Function and homology informationpositive regulation of T cell extravasation / negative regulation of smooth muscle cell differentiation / negative regulation of MHC class I biosynthetic process / spermine transport / MMXD complex / core TFIIH complex portion of holo TFIIH complex / SAGA complex assembly / lateral mesodermal cell differentiation / enucleate erythrocyte development / regulation of RNA biosynthetic process ...positive regulation of T cell extravasation / negative regulation of smooth muscle cell differentiation / negative regulation of MHC class I biosynthetic process / spermine transport / MMXD complex / core TFIIH complex portion of holo TFIIH complex / SAGA complex assembly / lateral mesodermal cell differentiation / enucleate erythrocyte development / regulation of RNA biosynthetic process / DNA-templated transcription open complex formation / allantois development / positive regulation of type II interferon-mediated signaling pathway / pre-snoRNP complex / positive regulation of androgen receptor signaling pathway / Cytosolic iron-sulfur cluster assembly / androgen biosynthetic process / positive regulation of G0 to G1 transition / TFIIH-class transcription factor complex binding / central nervous system myelin formation / negative regulation of protein autoubiquitination / retinal pigment epithelium development / positive regulation of core promoter binding / G0 to G1 transition / negative regulation of MHC class II biosynthetic process / thyroid hormone receptor signaling pathway / transcription factor TFTC complex / RNA polymerase II core complex assembly / mammary gland branching involved in thelarche / RNA polymerase II CTD heptapeptide repeat S5 kinase activity / positive regulation of mitotic recombination / hair cell differentiation / hair follicle maturation / RNA polymerase I general transcription initiation factor activity / regulation of cell cycle G1/S phase transition / core mediator complex / transcription factor TFIIE complex / nucleotide-excision repair factor 3 complex / RNA polymerase transcription factor SL1 complex / nucleotide-excision repair, preincision complex assembly / meiotic sister chromatid cohesion / phosphatase activator activity / ventricular system development / regulation of vitamin D receptor signaling pathway / SLIK (SAGA-like) complex / histone H4K16ac reader activity / snRNA transcription by RNA polymerase II / CAK-ERCC2 complex / RNA polymerase III general transcription initiation factor activity / TFIIF-class transcription factor complex binding / transcription factor TFIIK complex / transcriptional start site selection at RNA polymerase II promoter / RNA polymerase I core promoter sequence-specific DNA binding / UV protection / hepatocyte differentiation / nuclear retinoic acid receptor binding / transcription factor TFIIF complex / embryonic cleavage / positive regulation of hepatocyte proliferation / positive regulation of response to cytokine stimulus / ventricular trabecula myocardium morphogenesis / mediator complex / DNA 5'-3' helicase / positive regulation of keratinocyte differentiation / thyroid hormone generation / 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 / 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 / transcription factor TFIIA complex / adult heart development / maintenance of protein location in nucleus / C2H2 zinc finger domain binding / female germ cell nucleus / RNA Polymerase III Abortive And Retractive Initiation / regulation of cyclin-dependent protein serine/threonine kinase activity / peroxisome proliferator activated receptor binding / G protein-coupled receptor internalization / histone H3K4me3 reader activity Similarity search - Function | ||||||
| Biological species | Homo sapiens (human)![]() | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.13 Å | ||||||
Authors | Chen, X. / Qi, Y. / Wang, X. / Wu, Z. / Yin, X. / Li, J. / Liu, W. / Xu, Y. | ||||||
Citation | Journal: Science / Year: 2021Title: 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: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7enc.cif.gz | 4 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb7enc.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 7enc.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 7enc_validation.pdf.gz | 1.5 MB | Display | wwPDB validaton report |
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| Full document | 7enc_full_validation.pdf.gz | 1.7 MB | Display | |
| Data in XML | 7enc_validation.xml.gz | 420.4 KB | Display | |
| Data in CIF | 7enc_validation.cif.gz | 709.6 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/en/7enc ftp://data.pdbj.org/pub/pdb/validation_reports/en/7enc | 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: Homo sapiens (human) |
| Source (recombinant) | Organism: Homo sapiens (human) |
| 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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| 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 |
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Homo sapiens (human)

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