+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-34996 | |||||||||
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Title | Thermus thermophilus RNA polymerase elongation complex | |||||||||
Map data | ||||||||||
Sample |
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Keywords | Transcription elongation complex / RNA polymerase / TRANSCRIPTION | |||||||||
Function / homology | Function and homology information DNA-directed RNA polymerase complex / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / protein dimerization activity / DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / cytoplasm Similarity search - Function | |||||||||
Biological species | Thermus thermophilus HB8 (bacteria) / DNA molecule (others) / synthetic construct (others) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
Authors | Murayama Y / Ehara H / Sekine S | |||||||||
Funding support | Japan, 2 items
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Citation | Journal: Sci Adv / Year: 2023 Title: Structural basis of the transcription termination factor Rho engagement with transcribing RNA polymerase from . Authors: Yuko Murayama / Haruhiko Ehara / Mari Aoki / Mie Goto / Takeshi Yokoyama / Shun-Ichi Sekine / Abstract: Transcription termination is an essential step in transcription by RNA polymerase (RNAP) and crucial for gene regulation. For many bacterial genes, transcription termination is mediated by the ...Transcription termination is an essential step in transcription by RNA polymerase (RNAP) and crucial for gene regulation. For many bacterial genes, transcription termination is mediated by the adenosine triphosphate-dependent RNA translocase/helicase Rho, which causes RNA/DNA dissociation from the RNAP elongation complex (EC). However, the structural basis of the interplay between Rho and RNAP remains obscure. Here, we report the cryo-electron microscopy structure of the RNAP EC engaged with Rho. The Rho hexamer binds RNAP through the carboxyl-terminal domains, which surround the RNA exit site of RNAP, directing the nascent RNA seamlessly from the RNA exit to its central channel. The β-flap tip at the RNA exit is critical for the Rho-dependent RNA release, and its deletion causes an alternative Rho-RNAP binding mode, which is irrelevant to termination. The Rho binding site overlaps with the binding sites of other macromolecules, such as ribosomes, providing a general basis of gene regulation. | |||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_34996.map.gz | 98.3 MB | EMDB map data format | |
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Header (meta data) | emd-34996-v30.xml emd-34996.xml | 25 KB 25 KB | Display Display | EMDB header |
Images | emd_34996.png | 87 KB | ||
Filedesc metadata | emd-34996.cif.gz | 8.1 KB | ||
Others | emd_34996_half_map_1.map.gz emd_34996_half_map_2.map.gz | 98.3 MB 98.3 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-34996 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-34996 | HTTPS FTP |
-Validation report
Summary document | emd_34996_validation.pdf.gz | 940.8 KB | Display | EMDB validaton report |
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Full document | emd_34996_full_validation.pdf.gz | 940.4 KB | Display | |
Data in XML | emd_34996_validation.xml.gz | 13.9 KB | Display | |
Data in CIF | emd_34996_validation.cif.gz | 16.2 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-34996 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-34996 | HTTPS FTP |
-Related structure data
Related structure data | 8hsgMC 8hshC 8hsjC 8hslC 8hsrC C: citing same article (ref.) M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_34996.map.gz / Format: CCP4 / Size: 125 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: 1.06 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #1
File | emd_34996_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #2
File | emd_34996_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
+Entire : RNA polymerase elongation complex
+Supramolecule #1: RNA polymerase elongation complex
+Macromolecule #1: DNA-directed RNA polymerase subunit alpha
+Macromolecule #2: DNA-directed RNA polymerase subunit beta
+Macromolecule #3: DNA-directed RNA polymerase subunit beta'
+Macromolecule #4: DNA-directed RNA polymerase subunit omega
+Macromolecule #5: DNA (37-MER)
+Macromolecule #7: DNA (27-MER)
+Macromolecule #6: RNA (5'-R(P*CP*CP*AP*CP*AP*UP*CP*CP*AP*CP*CP*U)-3')
+Macromolecule #8: ZINC ION
+Macromolecule #9: MAGNESIUM ION
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | TFS KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (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 / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.2 µm |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: PDB ENTRY PDB model - PDB ID: |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 219822 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |