+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-30578 | |||||||||
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Title | cryo-EM structure of human RNA polymerase III in apo state | |||||||||
Map data | ||||||||||
Sample |
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Keywords | RNA Polymerase III / TRANSCRIPTION | |||||||||
Function / homology | Function and homology information snRNA transcription by RNA polymerase III / RNA Polymerase III Chain Elongation / RNA Polymerase III Transcription Termination / calcitonin gene-related peptide receptor activity / DNA/RNA hybrid binding / regulation of transcription by RNA polymerase I / regulation of transcription by RNA polymerase III / RPAP3/R2TP/prefoldin-like complex / DNA polymerase III complex / Cytosolic sensors of pathogen-associated DNA ...snRNA transcription by RNA polymerase III / RNA Polymerase III Chain Elongation / RNA Polymerase III Transcription Termination / calcitonin gene-related peptide receptor activity / DNA/RNA hybrid binding / regulation of transcription by RNA polymerase I / regulation of transcription by RNA polymerase III / RPAP3/R2TP/prefoldin-like complex / DNA polymerase III complex / Cytosolic sensors of pathogen-associated DNA / 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 / RNA Polymerase III Abortive And Retractive Initiation / positive regulation of innate immune response / Abortive elongation of HIV-1 transcript in the absence of Tat / nucleobase-containing compound metabolic process / RNA Polymerase I Transcription Termination / FGFR2 alternative splicing / MicroRNA (miRNA) biogenesis / Signaling by FGFR2 IIIa TM / Viral Messenger RNA Synthesis / RNA Pol II CTD phosphorylation and interaction with CE during HIV infection / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / Formation of the HIV-1 Early Elongation Complex / mRNA Capping / PIWI-interacting RNA (piRNA) biogenesis / HIV Transcription Initiation / RNA Polymerase II HIV Promoter Escape / Transcription of the HIV genome / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Initiation And Promoter Clearance / termination of RNA polymerase III transcription / transcription initiation at RNA polymerase III promoter / RNA polymerase III activity / mRNA Splicing - Minor Pathway / RNA Polymerase I Transcription Initiation / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / transcription by RNA polymerase I / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / Processing of Capped Intron-Containing Pre-mRNA / transcription by RNA polymerase III / RNA polymerase II transcribes snRNA genes / neuropeptide signaling pathway / Tat-mediated elongation of the HIV-1 transcript / transcription elongation by RNA polymerase I / Formation of HIV-1 elongation complex containing HIV-1 Tat / tRNA transcription by RNA polymerase III / RNA polymerase I complex / RNA polymerase I activity / RNA polymerase III complex / Formation of HIV elongation complex in the absence of HIV Tat / RNA polymerase II, core complex / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / RNA Polymerase II Pre-transcription Events / Inhibition of DNA recombination at telomere / positive regulation of interferon-beta production / mRNA Splicing - Major Pathway / acrosomal vesicle / protein-DNA complex / TP53 Regulates Transcription of DNA Repair Genes / RNA Polymerase I Promoter Escape / Transcriptional regulation by small RNAs / NoRC negatively regulates rRNA expression / B-WICH complex positively regulates rRNA expression / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / Formation of TC-NER Pre-Incision Complex / ribonucleoside binding / fibrillar center / Activation of anterior HOX genes in hindbrain development during early embryogenesis / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / single-stranded DNA binding / 4 iron, 4 sulfur cluster binding / double-stranded DNA binding / defense response to virus / Estrogen-dependent gene expression / transcription by RNA polymerase II / cell population proliferation / nucleic acid binding / nuclear body / protein dimerization activity / protein stabilization / intracellular membrane-bounded organelle / innate immune response / nucleotide binding / centrosome / DNA-templated transcription / chromatin binding / magnesium ion binding / DNA binding / zinc ion binding Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
Authors | Wang Q / Wan F | |||||||||
Citation | Journal: Nat Struct Mol Biol / Year: 2021 Title: Structural insights into transcriptional regulation of human RNA polymerase III. Authors: Qianmin Wang / Shaobai Li / Futang Wan / Youwei Xu / Zhenfang Wu / Mi Cao / Pengfei Lan / Ming Lei / Jian Wu / Abstract: RNA polymerase III (Pol III) synthesizes structured, essential small RNAs, such as transfer RNA, 5S ribosomal RNA and U6 small nuclear RNA. Pol III, the largest nuclear RNA polymerase, is composed of ...RNA polymerase III (Pol III) synthesizes structured, essential small RNAs, such as transfer RNA, 5S ribosomal RNA and U6 small nuclear RNA. Pol III, the largest nuclear RNA polymerase, is composed of a conserved core region and eight constitutive regulatory subunits, but how these factors jointly regulate Pol III transcription remains unclear. Here, we present cryo-EM structures of human Pol III in both apo and elongating states, which unveil both an orchestrated movement during the apo-to-elongating transition and an unexpected apo state in which the RPC7 subunit tail occupies the DNA-RNA-binding cleft of Pol III, suggesting that RPC7 plays important roles in both autoinhibition and transcription initiation. The structures also reveal a proofreading mechanism for the TFIIS-like subunit RPC10, which stably retains its catalytic position in the secondary channel, explaining the high fidelity of Pol III transcription. Our work provides an integrated picture of the mechanism of Pol III transcription regulation. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_30578.map.gz | 133.7 MB | EMDB map data format | |
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Header (meta data) | emd-30578-v30.xml emd-30578.xml | 28.7 KB 28.7 KB | Display Display | EMDB header |
Images | emd_30578.png | 79.4 KB | ||
Filedesc metadata | emd-30578.cif.gz | 9.3 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-30578 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-30578 | HTTPS FTP |
-Validation report
Summary document | emd_30578_validation.pdf.gz | 521.6 KB | Display | EMDB validaton report |
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Full document | emd_30578_full_validation.pdf.gz | 521.2 KB | Display | |
Data in XML | emd_30578_validation.xml.gz | 6.5 KB | Display | |
Data in CIF | emd_30578_validation.cif.gz | 7.4 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-30578 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-30578 | HTTPS FTP |
-Related structure data
Related structure data | 7d59MC 7d58C M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_30578.map.gz / Format: CCP4 / Size: 144.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.09 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
+Entire : RNA Pol3 Apo
+Supramolecule #1: RNA Pol3 Apo
+Macromolecule #1: DNA-directed RNA polymerase III subunit RPC1
+Macromolecule #2: DNA-directed RNA polymerase III subunit RPC2
+Macromolecule #3: DNA-directed RNA polymerases I and III subunit RPAC1
+Macromolecule #4: DNA-directed RNA polymerase III subunit RPC9
+Macromolecule #5: DNA-directed RNA polymerases I, II, and III subunit RPABC1
+Macromolecule #6: DNA-directed RNA polymerases I, II, and III subunit RPABC2
+Macromolecule #7: DNA-directed RNA polymerase III subunit RPC8
+Macromolecule #8: DNA-directed RNA polymerases I, II, and III subunit RPABC3
+Macromolecule #9: DNA-directed RNA polymerase III subunit RPC10
+Macromolecule #10: DNA-directed RNA polymerases I, II, and III subunit RPABC5
+Macromolecule #11: DNA-directed RNA polymerases I and III subunit RPAC2
+Macromolecule #12: DNA-directed RNA polymerases I, II, and III subunit RPABC4
+Macromolecule #13: DNA-directed RNA polymerase III subunit RPC5
+Macromolecule #14: DNA-directed RNA polymerase III subunit RPC4
+Macromolecule #15: DNA-directed RNA polymerase III subunit RPC3
+Macromolecule #16: DNA-directed RNA polymerase III subunit RPC6
+Macromolecule #17: DNA-directed RNA polymerase III subunit RPC7
+Macromolecule #18: ZINC ION
+Macromolecule #19: IRON/SULFUR CLUSTER
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 8 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: NONE |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 264514 |
Initial angle assignment | Type: COMMON LINE |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |