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-Structure paper
タイトル | Structure of the human Mediator-bound transcription preinitiation complex. |
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ジャーナル・号・ページ | Science, Vol. 372, Issue 6537, Page 52-56, Year 2021 |
掲載日 | 2021年4月2日 |
![]() | R Abdella / A Talyzina / S Chen / C J Inouye / R Tjian / Y He / ![]() |
PubMed 要旨 | Eukaryotic transcription requires the assembly of a multisubunit preinitiation complex (PIC) composed of RNA polymerase II (Pol II) and the general transcription factors. The coactivator Mediator is ...Eukaryotic transcription requires the assembly of a multisubunit preinitiation complex (PIC) composed of RNA polymerase II (Pol II) and the general transcription factors. The coactivator Mediator is recruited by transcription factors, facilitates the assembly of the PIC, and stimulates phosphorylation of the Pol II C-terminal domain (CTD) by the TFIIH subunit CDK7. Here, we present the cryo-electron microscopy structure of the human Mediator-bound PIC at a resolution below 4 angstroms. Transcription factor binding sites within Mediator are primarily flexibly tethered to the tail module. CDK7 is stabilized by multiple contacts with Mediator. Two binding sites exist for the Pol II CTD, one between the head and middle modules of Mediator and the other in the active site of CDK7, providing structural evidence for Pol II CTD phosphorylation within the Mediator-bound PIC. |
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手法 | EM (単粒子) |
解像度 | 3.4 - 7.1 Å |
構造データ | EMDB-23255, PDB-7lbm: ![]() EMDB-23256: ![]() EMDB-23257: ![]() EMDB-23258: ![]() EMDB-23259: ![]() EMDB-23260: ![]() EMDB-23261: ![]() EMDB-23262: |
化合物 | ![]() ChemComp-MG: ![]() ChemComp-ZN: ![]() ChemComp-SF4: |
由来 |
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![]() | TRANSCRIPTION/DNA / pre-initiation complex / Mediator / initiation / complex / transcription / TRANSCRIPTION-DNA complex |