- EMDB-31450: Structure of RPAP2-bound RNA polymerase II -
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データベース: EMDB / ID: EMD-31450
タイトル
Structure of RPAP2-bound RNA polymerase II
マップデータ
試料
複合体: Structure of RPAP2-bound RNA polymerase II
タンパク質・ペプチド: x 13種
リガンド: x 1種
機能・相同性
機能・相同性情報
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 / Formation of RNA Pol II elongation complex / Formation of the Early Elongation Complex / Transcriptional regulation by small RNAs ...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 / 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 - Major Pathway / 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 / : / : / maintenance of transcriptional fidelity during transcription elongation by RNA polymerase II / organelle membrane / positive regulation of nuclear-transcribed mRNA poly(A) tail shortening / tRNA transcription by RNA polymerase III / RNA polymerase III activity / RNA polymerase I activity / positive regulation of translational initiation / RNA polymerase I complex / RNA polymerase III complex / transcription-coupled nucleotide-excision repair / RNA polymerase II activity / RNA polymerase II, core complex / translation initiation factor binding / transcription initiation at RNA polymerase II promoter / P-body / ribonucleoside binding / 核小体 / DNA-directed 5'-3' RNA polymerase activity / ポリメラーゼ / single-stranded DNA binding / transcription by RNA polymerase II / nucleic acid binding / single-stranded RNA binding / protein dimerization activity / nucleotide binding / 核小体 / DNA binding / zinc ion binding / metal ion binding / 細胞核 / 細胞質基質 類似検索 - 分子機能
DNA-directed RNA polymerase II subunit RPB4 / RNA polymerase II, I and III subunit K / DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerase II subunit RPB11-a / DNA-directed RNA polymerases I, II, and III subunit RPABC3 / DNA-directed RNA polymerases I, II, and III subunit RPABC2 / DNA-directed RNA polymerase subunit / DNA-directed RNA polymerase II subunit E / DNA-directed RNA polymerase II subunit RPB3 / DNA-directed RNA polymerase II subunit RPB9 類似検索 - 構成要素
ジャーナル: Cell Rep / 年: 2022 タイトル: RPAP2 regulates a transcription initiation checkpoint by inhibiting assembly of pre-initiation complex. 著者: Xinxin Wang / Yilun Qi / Zhenning Wang / Li Wang / Aixia Song / Bolin Tao / Jiabei Li / Dan Zhao / Hongwei Zhang / Qianwei Jin / Yi-Zhou Jiang / Fei Xavier Chen / Yanhui Xu / Xizi Chen / 要旨: RNA polymerase II (Pol II)-mediated transcription in metazoans requires precise regulation. RNA Pol II-associated protein 2 (RPAP2) was previously identified to transport Pol II from cytoplasm to ...RNA polymerase II (Pol II)-mediated transcription in metazoans requires precise regulation. RNA Pol II-associated protein 2 (RPAP2) was previously identified to transport Pol II from cytoplasm to nucleus and dephosphorylates Pol II C-terminal domain (CTD). Here, we show that RPAP2 binds hypo-/hyper-phosphorylated Pol II with undetectable phosphatase activity. The structure of RPAP2-Pol II shows mutually exclusive assembly of RPAP2-Pol II and pre-initiation complex (PIC) due to three steric clashes. RPAP2 prevents and disrupts Pol II-TFIIF interaction and impairs in vitro transcription initiation, suggesting a function in inhibiting PIC assembly. Loss of RPAP2 in cells leads to global accumulation of TFIIF and Pol II at promoters, indicating a critical role of RPAP2 in inhibiting PIC assembly independent of its putative phosphatase activity. Our study indicates that RPAP2 functions as a gatekeeper to inhibit PIC assembly and transcription initiation and suggests a transcription checkpoint.