+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-3958 | |||||||||||||||
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Title | Apo RNA Polymerase III - closed conformation (cPOL3) | |||||||||||||||
Map data | ||||||||||||||||
Sample |
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Keywords | RNA Pol III / promoter opening / transcription | |||||||||||||||
Function / homology | Function and homology information RNA Polymerase I Transcription Initiation / Processing of Capped Intron-Containing Pre-mRNA / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / mRNA Capping / RNA polymerase II transcribes snRNA genes / TP53 Regulates Transcription of DNA Repair Genes / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening ...RNA Polymerase I Transcription Initiation / Processing of Capped Intron-Containing Pre-mRNA / RNA Polymerase III Transcription Initiation From Type 2 Promoter / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / mRNA Capping / RNA polymerase II transcribes snRNA genes / TP53 Regulates Transcription of DNA Repair Genes / 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 / RNA Polymerase II Pre-transcription Events / RNA-templated transcription / termination of RNA polymerase III transcription / Formation of TC-NER Pre-Incision Complex / transcription initiation at RNA polymerase III promoter / termination of RNA polymerase I transcription / RNA polymerase III activity / RNA Polymerase I Promoter Escape / nucleolar large rRNA transcription by RNA polymerase I / Gap-filling DNA repair synthesis and ligation in TC-NER / transcription by RNA polymerase I / transcription initiation at RNA polymerase I promoter / Estrogen-dependent gene expression / transcription by RNA polymerase III / Dual incision in TC-NER / transcription elongation by RNA polymerase I / tRNA transcription by RNA polymerase III / RNA polymerase I complex / RNA polymerase I activity / RNA polymerase III complex / RNA polymerase II, core complex / nucleotidyltransferase activity / transcription initiation at RNA polymerase II promoter / transcription elongation by RNA polymerase II / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / peroxisome / ribosome biogenesis / single-stranded DNA binding / transcription by RNA polymerase II / nucleic acid binding / protein dimerization activity / nucleotide binding / nucleolus / mitochondrion / DNA binding / zinc ion binding / nucleoplasm / nucleus / metal ion binding / cytosol / cytoplasm Similarity search - Function | |||||||||||||||
Biological species | Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) | |||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.3 Å | |||||||||||||||
Authors | Abascal-Palacios G / Ramsay EP | |||||||||||||||
Funding support | United Kingdom, 4 items
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Citation | Journal: Nature / Year: 2018 Title: Structural basis of RNA polymerase III transcription initiation. Authors: Guillermo Abascal-Palacios / Ewan Phillip Ramsay / Fabienne Beuron / Edward Morris / Alessandro Vannini / Abstract: RNA polymerase (Pol) III transcribes essential non-coding RNAs, including the entire pool of transfer RNAs, the 5S ribosomal RNA and the U6 spliceosomal RNA, and is often deregulated in cancer cells. ...RNA polymerase (Pol) III transcribes essential non-coding RNAs, including the entire pool of transfer RNAs, the 5S ribosomal RNA and the U6 spliceosomal RNA, and is often deregulated in cancer cells. The initiation of gene transcription by Pol III requires the activity of the transcription factor TFIIIB to form a transcriptionally active Pol III preinitiation complex (PIC). Here we present electron microscopy reconstructions of Pol III PICs at 3.4-4.0 Å and a reconstruction of unbound apo-Pol III at 3.1 Å. TFIIIB fully encircles the DNA and restructures Pol III. In particular, binding of the TFIIIB subunit Bdp1 rearranges the Pol III-specific subunits C37 and C34, thereby promoting DNA opening. The unwound DNA directly contacts both sides of the Pol III cleft. Topologically, the Pol III PIC resembles the Pol II PIC, whereas the Pol I PIC is more divergent. The structures presented unravel the molecular mechanisms underlying the first steps of Pol III transcription and also the general conserved mechanisms of gene transcription initiation. | |||||||||||||||
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_3958.map.gz | 10.5 MB | EMDB map data format | |
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Header (meta data) | emd-3958-v30.xml emd-3958.xml | 33.1 KB 33.1 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_3958_fsc.xml | 10.8 KB | Display | FSC data file |
Images | emd_3958.png | 52.5 KB | ||
Filedesc metadata | emd-3958.cif.gz | 9.9 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-3958 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-3958 | HTTPS FTP |
-Validation report
Summary document | emd_3958_validation.pdf.gz | 249.5 KB | Display | EMDB validaton report |
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Full document | emd_3958_full_validation.pdf.gz | 248.7 KB | Display | |
Data in XML | emd_3958_validation.xml.gz | 11.8 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-3958 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-3958 | HTTPS FTP |
-Related structure data
Related structure data | 6eu3MC 3955C 3956C 3957C 3959C 6eu0C 6eu1C 6eu2C 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_3958.map.gz / Format: CCP4 / Size: 111.5 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: 1.05 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 : Apo RNA Polymerase III - Closed Conformation
+Supramolecule #1: Apo RNA Polymerase III - Closed Conformation
+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: MAGNESIUM ION
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 0.1 mg/mL |
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Buffer | pH: 8 |
Grid | Model: Quantifoil R2/2 / Material: MOLYBDENUM / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 40.0 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 |