+Open data
-Basic information
Entry | Database: PDB / ID: 7khb | |||||||||
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Title | Escherichia coli RNA polymerase and rrnBP1 promoter open complex | |||||||||
Components |
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Keywords | TRANSCRIPTION/DNA / TRANSCRIPTION / TRANSCRIPTION-DNA complex | |||||||||
Function / homology | Function and homology information sigma factor antagonist complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / bacterial-type flagellum-dependent cell motility / nitrate assimilation ...sigma factor antagonist complex / RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / bacterial-type flagellum-dependent cell motility / nitrate assimilation / transcription elongation factor complex / regulation of DNA-templated transcription elongation / transcription antitermination / DNA-templated transcription initiation / 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 / negative regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
Biological species | Escherichia coli (E. coli) Escherichia coli K-12 (bacteria) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.53 Å | |||||||||
Authors | Shin, Y. / Qayyum, M.Z. / Murakami, K.S. | |||||||||
Funding support | United States, 2items
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Citation | Journal: Nat Commun / Year: 2021 Title: Structural basis of ribosomal RNA transcription regulation. Authors: Yeonoh Shin / M Zuhaib Qayyum / Danil Pupov / Daria Esyunina / Andrey Kulbachinskiy / Katsuhiko S Murakami / Abstract: Ribosomal RNA (rRNA) is most highly expressed in rapidly growing bacteria and is drastically downregulated under stress conditions by the global transcriptional regulator DksA and the alarmone ppGpp. ...Ribosomal RNA (rRNA) is most highly expressed in rapidly growing bacteria and is drastically downregulated under stress conditions by the global transcriptional regulator DksA and the alarmone ppGpp. Here, we determined cryo-electron microscopy structures of the Escherichia coli RNA polymerase (RNAP) σ holoenzyme during rRNA promoter recognition with and without DksA/ppGpp. RNAP contacts the UP element using dimerized α subunit carboxyl-terminal domains and scrunches the template DNA with the σ finger and β' lid to select the transcription start site favorable for rapid promoter escape. Promoter binding induces conformational change of σ domain 2 that opens a gate for DNA loading and ejects σ from the RNAP cleft to facilitate open complex formation. DksA/ppGpp binding also opens the DNA loading gate, which is not coupled to σ ejection and impedes open complex formation. These results provide a molecular basis for the exceptionally active rRNA transcription and its vulnerability to DksA/ppGpp. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 7khb.cif.gz | 733 KB | Display | PDBx/mmCIF format |
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PDB format | pdb7khb.ent.gz | 570.3 KB | Display | PDB format |
PDBx/mmJSON format | 7khb.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 7khb_validation.pdf.gz | 1 MB | Display | wwPDB validaton report |
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Full document | 7khb_full_validation.pdf.gz | 1.1 MB | Display | |
Data in XML | 7khb_validation.xml.gz | 106.2 KB | Display | |
Data in CIF | 7khb_validation.cif.gz | 165 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/kh/7khb ftp://data.pdbj.org/pub/pdb/validation_reports/kh/7khb | HTTPS FTP |
-Related structure data
Related structure data | 21880MC 7khcC 7kheC 7khiC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
-DNA-directed RNA polymerase subunit ... , 4 types, 5 molecules ABCDE
#1: Protein | Mass: 36558.680 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Escherichia coli (strain K12) (bacteria) Strain: K12 / Gene: rpoA, pez, phs, sez, b3295, JW3257 / Production host: Escherichia coli K-12 (bacteria) / Strain (production host): K12 / References: UniProt: P0A7Z4, DNA-directed RNA polymerase #2: Protein | | Mass: 150820.875 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Escherichia coli (strain K12) (bacteria) Strain: K12 Gene: rpoB, groN, nitB, rif, ron, stl, stv, tabD, b3987, JW3950 Production host: Escherichia coli K-12 (bacteria) / Strain (production host): K12 / References: UniProt: P0A8V2, DNA-directed RNA polymerase #3: Protein | | Mass: 155366.781 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Escherichia coli (strain K12) (bacteria) Strain: K12 / Gene: rpoC, tabB, b3988, JW3951 / Production host: Escherichia coli K-12 (bacteria) / Strain (production host): K12 / References: UniProt: P0A8T7, DNA-directed RNA polymerase #4: Protein | | Mass: 10249.547 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Escherichia coli (strain K12) (bacteria) Strain: K12 / Gene: rpoZ, b3649, JW3624 / Production host: Escherichia coli K-12 (bacteria) / Strain (production host): K12 / References: UniProt: P0A800, DNA-directed RNA polymerase |
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-Protein , 1 types, 1 molecules F
#5: Protein | Mass: 70352.242 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Escherichia coli (strain K12) (bacteria) Strain: K12 / Gene: rpoD, alt, b3067, JW3039 / Production host: Escherichia coli K-12 (bacteria) / Strain (production host): K12 / References: UniProt: P00579 |
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-DNA chain , 2 types, 2 molecules XY
#6: DNA chain | Mass: 19552.533 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Strain: K12 / Production host: Escherichia coli K-12 (bacteria) / Strain (production host): K12 |
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#7: DNA chain | Mass: 19903.734 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Strain: K12 / Production host: Escherichia coli K-12 (bacteria) / Strain (production host): K12 |
-Non-polymers , 3 types, 5 molecules
#8: Chemical | #9: Chemical | ChemComp-MG / | #10: Chemical | |
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-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: Escherichia coli RNA polymerase and rrnBP1 promoter open complex Type: COMPLEX / Entity ID: #1-#7 / Source: RECOMBINANT |
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Source (natural) | Organism: Escherichia coli K-12 (bacteria) |
Source (recombinant) | Organism: Escherichia coli K-12 (bacteria) |
Buffer solution | pH: 8 |
Specimen | Conc.: 10 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER |
Electron lens | Mode: OTHER |
Image recording | Electron dose: 45 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
-Processing
Software |
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EM software | Name: RELION / Version: 3.0.8 / Category: 3D reconstruction | ||||||||||||||||||||||||
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.53 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 349752 / Symmetry type: POINT | ||||||||||||||||||||||||
Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
Displacement parameters | Biso mean: 90.59 Å2 | ||||||||||||||||||||||||
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