Mediator of RNA polymerase II transcription subunit 19 / Mediator of RNA polymerase II transcription subunit 7 / Mediator of RNA polymerase II transcription subunit 14 / Mediator of RNA polymerase II transcription subunit 24 / Mediator of RNA polymerase II transcription subunit 6 / Mediator of RNA polymerase II transcription subunit 26 / Mediator of RNA polymerase II transcription subunit 21 / Mediator of RNA polymerase II transcription subunit 22 / Mediator of RNA polymerase II transcription subunit 1 / Mediator of RNA polymerase II transcription subunit 27 ...Mediator of RNA polymerase II transcription subunit 19 / Mediator of RNA polymerase II transcription subunit 7 / Mediator of RNA polymerase II transcription subunit 14 / Mediator of RNA polymerase II transcription subunit 24 / Mediator of RNA polymerase II transcription subunit 6 / Mediator of RNA polymerase II transcription subunit 26 / Mediator of RNA polymerase II transcription subunit 21 / Mediator of RNA polymerase II transcription subunit 22 / Mediator of RNA polymerase II transcription subunit 1 / Mediator of RNA polymerase II transcription subunit 27 / Mediator of RNA polymerase II transcription subunit 8 / Mediator of RNA polymerase II transcription subunit 30 / Mediator of RNA polymerase II transcription subunit 15 / Mediator of RNA polymerase II transcription subunit 10 / Mediator of RNA polymerase II transcription subunit 18 / Mediator of RNA polymerase II transcription subunit 28 / Mediator of RNA polymerase II transcription subunit 20 / Mediator of RNA polymerase II transcription subunit 4 / Mediator of RNA polymerase II transcription subunit 17 / Mediator of RNA polymerase II transcription subunit 9 / Mediator of RNA polymerase II transcription subunit 29 / Mediator of RNA polymerase II transcription subunit 11 / Mediator of RNA polymerase II transcription subunit 23 / Mediator of RNA polymerase II transcription subunit 16 / Mediator of RNA polymerase II transcription subunit 31 類似検索 - 構成要素
ジャーナル: Science / 年: 2021 タイトル: Structures of the human Mediator and Mediator-bound preinitiation complex. 著者: Xizi Chen / Xiaotong Yin / Jiabei Li / Zihan Wu / Yilun Qi / Xinxin Wang / Weida Liu / Yanhui Xu / 要旨: 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.
#258 - 2021年6月 糖質コルチコイド受容体とデキサメタゾン (Glucocorticoid Receptor and Dexamethasone) 類似性 (2)
-
集合体
登録構造単位
A: Mediator of RNA polymerase II transcription subunit 1 B: Unknown Chain D: Mediator of RNA polymerase II transcription subunit 4 F: Mediator of RNA polymerase II transcription subunit 6 G: Mediator of RNA polymerase II transcription subunit 7 H: Isoform 2 of Mediator of RNA polymerase II transcription subunit 8 I: Mediator of RNA polymerase II transcription subunit 9 J: Mediator of RNA polymerase II transcription subunit 10 K: Mediator of RNA polymerase II transcription subunit 11 N: Mediator of RNA polymerase II transcription subunit 14 O: Mediator of RNA polymerase II transcription subunit 15 P: Mediator of RNA polymerase II transcription subunit 16 Q: Mediator of RNA polymerase II transcription subunit 17 R: Mediator of RNA polymerase II transcription subunit 18 S: Mediator of RNA polymerase II transcription subunit 19 T: Mediator of RNA polymerase II transcription subunit 20 U: Mediator of RNA polymerase II transcription subunit 21 V: Mediator of RNA polymerase II transcription subunit 22 W: Mediator of RNA polymerase II transcription subunit 23 X: Mediator of RNA polymerase II transcription subunit 24 Z: Mediator of RNA polymerase II transcription subunit 26 0: Mediator of RNA polymerase II transcription subunit 27 1: Mediator of RNA polymerase II transcription subunit 28 2: Mediator of RNA polymerase II transcription subunit 29 3: Mediator of RNA polymerase II transcription subunit 30 4: Mediator of RNA polymerase II transcription subunit 31 ヘテロ分子