- EMDB-31450: Structure of RPAP2-bound RNA polymerase II -
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Basic information
Entry
Database: EMDB / ID: EMD-31450
Title
Structure of RPAP2-bound RNA polymerase II
Map data
Sample
Complex: Structure of RPAP2-bound RNA polymerase II
Protein or peptide: x 13 types
Ligand: x 1 types
Keywords
RPAP2 / RNA Polymerase II / TRANSCRIPTION
Function / homology
Function and homology information
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 ...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 transcriptional fidelity during transcription elongation by RNA polymerase II / transcription by RNA polymerase III / transcription by RNA polymerase I / RNA polymerase I complex / RNA polymerase III complex / transcription-coupled nucleotide-excision repair / RNA polymerase II, core complex / tRNA transcription by RNA polymerase III / : / DNA-directed RNA polymerase activity / DNA-directed RNA polymerase complex / transcription initiation at RNA polymerase II promoter / DNA-templated transcription initiation / ribonucleoside binding / : / : / : / fibrillar center / : / : / : / DNA-directed RNA polymerase / transcription by RNA polymerase II / nucleic acid binding / protein dimerization activity / nucleotide binding / DNA-templated transcription / nucleolus / mitochondrion / DNA binding / zinc ion binding / nucleoplasm / nucleus / cytosol Similarity search - Function
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 Similarity search - Component
Biological species
Homo sapiens (human) / Sus scrofa (pig)
Method
single particle reconstruction / cryo EM / Resolution: 2.78 Å
Journal: Cell Rep / Year: 2022 Title: RPAP2 regulates a transcription initiation checkpoint by inhibiting assembly of pre-initiation complex. Authors: 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 / Abstract: 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.
History
Deposition
Jun 18, 2021
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Header (metadata) release
Jul 7, 2021
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Map release
Jul 7, 2021
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Update
Oct 23, 2024
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Current status
Oct 23, 2024
Processing site: PDBj / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
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