+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-7002 | |||||||||
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Title | CryoEM structure of E.coli his pause elongation complex | |||||||||
Map data | CryoEM map | |||||||||
Sample |
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Keywords | DNA-dependent RNA polymerase / TRANSCRIPTION / transcription-dna-rna complex | |||||||||
Function / homology | Function and homology information RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / bacterial-type RNA polymerase core enzyme binding / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / bacterial-type flagellum assembly / bacterial-type flagellum-dependent cell motility / nitrate assimilation / transcription elongation factor complex ...RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / bacterial-type RNA polymerase core enzyme binding / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / bacterial-type flagellum assembly / bacterial-type flagellum-dependent cell motility / nitrate assimilation / transcription elongation factor complex / regulation of DNA-templated transcription elongation / DNA-templated transcription initiation / transcription antitermination / cell motility / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / response to heat / protein-containing complex assembly / intracellular iron ion homeostasis / protein dimerization activity / response to antibiotic / magnesium ion binding / DNA binding / zinc ion binding / membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Escherichia coli (E. coli) / Salmonella enterica subsp. enterica serovar Typhimurium (bacteria) / Escherichia coli (strain K12) (bacteria) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.8 Å | |||||||||
Authors | Kang JY / Darst SA | |||||||||
Funding support | United States, 1 items
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Citation | Journal: Mol Cell / Year: 2018 Title: RNA Polymerase Accommodates a Pause RNA Hairpin by Global Conformational Rearrangements that Prolong Pausing. Authors: Jin Young Kang / Tatiana V Mishanina / Michael J Bellecourt / Rachel Anne Mooney / Seth A Darst / Robert Landick / Abstract: Sequence-specific pausing by RNA polymerase (RNAP) during transcription plays crucial and diverse roles in gene expression. In bacteria, RNA structures are thought to fold within the RNA exit channel ...Sequence-specific pausing by RNA polymerase (RNAP) during transcription plays crucial and diverse roles in gene expression. In bacteria, RNA structures are thought to fold within the RNA exit channel of the RNAP and can increase pause lifetimes significantly. The biophysical mechanism of pausing is uncertain. We used single-particle cryo-EM to determine structures of paused complexes, including a 3.8-Å structure of an RNA hairpin-stabilized, paused RNAP that coordinates RNA folding in the his operon attenuation control region of E. coli. The structures revealed a half-translocated pause state (RNA post-translocated, DNA pre-translocated) that can explain transcriptional pausing and a global conformational change of RNAP that allosterically inhibits trigger loop folding and can explain pause hairpin action. Pause hairpin interactions with the RNAP RNA exit channel suggest how RNAP guides the formation of nascent RNA structures. | |||||||||
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_7002.map.gz | 117 MB | EMDB map data format | |
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Header (meta data) | emd-7002-v30.xml emd-7002.xml | 22.7 KB 22.7 KB | Display Display | EMDB header |
Images | emd_7002.png | 68.3 KB | ||
Filedesc metadata | emd-7002.cif.gz | 8.4 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-7002 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-7002 | HTTPS FTP |
-Validation report
Summary document | emd_7002_validation.pdf.gz | 582.7 KB | Display | EMDB validaton report |
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Full document | emd_7002_full_validation.pdf.gz | 582.3 KB | Display | |
Data in XML | emd_7002_validation.xml.gz | 6.4 KB | Display | |
Data in CIF | emd_7002_validation.cif.gz | 7.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-7002 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-7002 | HTTPS FTP |
-Related structure data
Related structure data | 6asxMC 7103C 6bjsC 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_7002.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | CryoEM map | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.03 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 : E.coli his pause elongation complex
+Supramolecule #1: E.coli his pause elongation complex
+Macromolecule #1: DNA (32-MER)
+Macromolecule #2: DNA (32-MER)
+Macromolecule #3: RNA (29-MER)
+Macromolecule #4: DNA-directed RNA polymerase subunit alpha
+Macromolecule #5: DNA-directed RNA polymerase subunit beta
+Macromolecule #6: DNA-directed RNA polymerase subunit beta'
+Macromolecule #7: DNA-directed RNA polymerase subunit omega
+Macromolecule #8: MAGNESIUM ION
+Macromolecule #9: ZINC ION
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 5 mg/mL |
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Buffer | pH: 8 Details: 20 mM Tris pH8.0, 150 mM potassium glutamate, 5 mM MgCl2, 5 mM DTT |
Grid | Model: C-flat / Material: GOLD / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: FEI VITROBOT MARK IV |
-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 / Digitization - Dimensions - Width: 3710 pixel / Digitization - Dimensions - Height: 3838 pixel / Digitization - Frames/image: 3-50 / Number grids imaged: 2 / Number real images: 2910 / Average exposure time: 10.0 sec. / Average electron dose: 72.4 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | C2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.4 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 29500 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
+Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: RIGID BODY FIT |
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Output model | PDB-6asx: |