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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-31450 | |||||||||
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Title | Structure of RPAP2-bound RNA polymerase II | |||||||||
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![]() | RPAP2 / RNA Polymerase II / TRANSCRIPTION | |||||||||
Function / homology | ![]() 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 / RNA polymerase I complex / RNA polymerase III complex / RNA polymerase II, core complex / tRNA transcription by RNA polymerase III / transcription by RNA polymerase I / transcription-coupled nucleotide-excision repair / DNA-directed RNA polymerase complex / transcription initiation at RNA polymerase II promoter / DNA-templated transcription initiation / ribonucleoside binding / fibrillar center / DNA-directed RNA polymerase / DNA-directed RNA polymerase activity / nucleic acid binding / transcription by RNA polymerase II / protein dimerization activity / nucleotide binding / DNA-templated transcription / nucleolus / mitochondrion / DNA binding / zinc ion binding / nucleoplasm / nucleus / cytosol Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.78 Å | |||||||||
![]() | Chen X / Qi Y | |||||||||
![]() | ![]() 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 |
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Structure visualization
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Structure viewer | EM map: ![]() ![]() ![]() |
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Downloads & links
-EMDB archive
Map data | ![]() | 117.8 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 23.9 KB 23.9 KB | Display Display | ![]() |
Images | ![]() | 71.3 KB | ||
Filedesc metadata | ![]() | 8.7 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 485.1 KB | Display | ![]() |
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Full document | ![]() | 484.6 KB | Display | |
Data in XML | ![]() | 6.8 KB | Display | |
Data in CIF | ![]() | 7.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7f4gMC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 1.044 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
+Entire : Structure of RPAP2-bound RNA polymerase II
+Supramolecule #1: Structure of RPAP2-bound RNA polymerase II
+Macromolecule #1: RPB1
+Macromolecule #2: DNA-directed RNA polymerase subunit beta
+Macromolecule #3: DNA-directed RNA polymerase II subunit RPB3
+Macromolecule #4: DNA-directed RNA polymerase II subunit E
+Macromolecule #5: DNA-directed RNA polymerase II subunit F
+Macromolecule #6: DNA-directed RNA polymerases I, II, and III subunit RPABC3
+Macromolecule #7: DNA-directed RNA polymerase II subunit RPB9
+Macromolecule #8: RPB10
+Macromolecule #9: RNA_pol_L_2 domain-containing protein
+Macromolecule #10: RPB12
+Macromolecule #11: RPAP2
+Macromolecule #12: DNA-directed RNA polymerase II subunit RPB4
+Macromolecule #13: DNA-directed RNA polymerase II subunit RPB7
+Macromolecule #14: ZINC ION
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.9 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: NONE |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 2.78 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 646517 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |