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Open data
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Basic information
| Entry | ![]() | |||||||||
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| Title | Thermus thermophilus RNA polymerase elongation complex | |||||||||
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Keywords | Transcription elongation complex / RNA polymerase / TRANSCRIPTION | |||||||||
| Function / homology | Function and homology informationDNA-directed RNA polymerase complex / ribonucleoside binding / DNA-directed RNA polymerase / DNA-directed RNA polymerase activity / 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: 2023Title: 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. | |||||||||
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Structure visualization
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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 ( M: atomic model generated by this map |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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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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| Density Histograms |
-Half map: #2
| File | emd_34996_half_map_2.map | ||||||||||||
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| Density Histograms |
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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 |
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Sample preparation
| Buffer | pH: 7.5 |
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| Vitrification | Cryogen name: ETHANE |
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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 |
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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 |
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About Yorodumi




Keywords
Thermus thermophilus HB8 (bacteria)
Authors
Japan, 2 items
Citation












Z (Sec.)
Y (Row.)
X (Col.)




































FIELD EMISSION GUN

