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Yorodumi- PDB-6xgf: Escherichia coli transcription-translation complex B (TTC-B) cont... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 6xgf | ||||||
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| Title | Escherichia coli transcription-translation complex B (TTC-B) containing an 30 nt long mRNA spacer, NusG, and fMet-tRNAs at E-site and P-site | ||||||
Components |
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Keywords | TRANSCRIPTION/TRANSLATION / TRANSCRIPTION-TRANSLATION complex | ||||||
| Function / homology | Function and homology informationDNA-templated transcription elongation / positive regulation of ribosome biogenesis / DnaA-L2 complex / negative regulation of DNA-templated DNA replication initiation / DNA-directed RNA polymerase complex / assembly of large subunit precursor of preribosome / regulation of DNA-templated transcription elongation / cytosolic ribosome assembly / transcription antitermination / regulation of cell growth ...DNA-templated transcription elongation / positive regulation of ribosome biogenesis / DnaA-L2 complex / negative regulation of DNA-templated DNA replication initiation / DNA-directed RNA polymerase complex / assembly of large subunit precursor of preribosome / regulation of DNA-templated transcription elongation / cytosolic ribosome assembly / transcription antitermination / regulation of cell growth / DNA-templated transcription termination / mRNA 5'-UTR binding / ribonucleoside binding / DNA-directed RNA polymerase / DNA-directed RNA polymerase activity / ribosome biogenesis / large ribosomal subunit / ribosome binding / transferase activity / small ribosomal subunit / 5S rRNA binding / small ribosomal subunit rRNA binding / ribosomal large subunit assembly / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / protein dimerization activity / rRNA binding / structural constituent of ribosome / ribosome / translation / ribonucleoprotein complex / mRNA binding / DNA-templated transcription / magnesium ion binding / DNA binding / RNA binding / zinc ion binding / metal ion binding / cytoplasm / cytosol Similarity search - Function | ||||||
| Biological species | ![]() synthetic construct (others) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 5 Å | ||||||
Authors | Molodtsov, V. / Wang, C. / Su, M. / Ebright, R.H. | ||||||
| Funding support | United States, 1items
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Citation | Journal: Science / Year: 2020Title: Structural basis of transcription-translation coupling. Authors: Chengyuan Wang / Vadim Molodtsov / Emre Firlar / Jason T Kaelber / Gregor Blaha / Min Su / Richard H Ebright / ![]() Abstract: In bacteria, transcription and translation are coupled processes in which the movement of RNA polymerase (RNAP)-synthesizing messenger RNA (mRNA) is coordinated with the movement of the first ...In bacteria, transcription and translation are coupled processes in which the movement of RNA polymerase (RNAP)-synthesizing messenger RNA (mRNA) is coordinated with the movement of the first ribosome-translating mRNA. Coupling is modulated by the transcription factors NusG (which is thought to bridge RNAP and the ribosome) and NusA. Here, we report cryo-electron microscopy structures of transcription-translation complexes (TTCs) containing different-length mRNA spacers between RNAP and the ribosome active-center P site. Structures of TTCs containing short spacers show a state incompatible with NusG bridging and NusA binding (TTC-A, previously termed "expressome"). Structures of TTCs containing longer spacers reveal a new state compatible with NusG bridging and NusA binding (TTC-B) and reveal how NusG bridges and NusA binds. We propose that TTC-B mediates NusG- and NusA-dependent transcription-translation coupling. | ||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 6xgf.cif.gz | 6.3 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb6xgf.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 6xgf.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 6xgf_validation.pdf.gz | 1.4 MB | Display | wwPDB validaton report |
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| Full document | 6xgf_full_validation.pdf.gz | 1.5 MB | Display | |
| Data in XML | 6xgf_validation.xml.gz | 272.9 KB | Display | |
| Data in CIF | 6xgf_validation.cif.gz | 484.4 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/xg/6xgf ftp://data.pdbj.org/pub/pdb/validation_reports/xg/6xgf | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 22181MC ![]() 6vu3C ![]() 6vyqC ![]() 6vyrC ![]() 6vysC ![]() 6vytC ![]() 6vyuC ![]() 6vywC ![]() 6vyxC ![]() 6vyyC ![]() 6vyzC ![]() 6vz2C ![]() 6vz3C ![]() 6vz5C ![]() 6vz7C ![]() 6vzjC ![]() 6x6tC ![]() 6x7fC ![]() 6x7kC ![]() 6x9qC ![]() 6xdqC ![]() 6xdrC ![]() 6xiiC ![]() 6xijC M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Links
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Assembly
| Deposited unit | ![]()
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Components
+50S ribosomal protein ... , 32 types, 32 molecules 012349YZbcefghijklmnopqrstuvwxyz
-DNA chain , 2 types, 2 molecules 56
| #6: DNA chain | Mass: 11042.110 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
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| #7: DNA chain | Mass: 10956.012 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
-RNA chain , 5 types, 6 molecules 7ABDad
| #8: RNA chain | Mass: 14136.979 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) | ||||||
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| #10: RNA chain | Mass: 24496.617 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #17: RNA chain | | Mass: 499690.031 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #40: RNA chain | | Mass: 941635.438 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #43: RNA chain | | Mass: 38790.090 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
-DNA-directed RNA polymerase subunit ... , 4 types, 5 molecules AAACADAEAF
| #11: Protein | Mass: 150820.875 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() | ||||
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| #13: Protein | Mass: 36558.680 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: A0A073G207, DNA-directed RNA polymerase #14: Protein | | Mass: 155366.781 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: A0A4S1NBU2, DNA-directed RNA polymerase #15: Protein | | Mass: 10249.547 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
-Protein , 1 types, 1 molecules AB
| #12: Protein | Mass: 20560.523 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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+30S ribosomal protein ... , 21 types, 21 molecules CEFGHIJKLMNOPQRSTUVWX
-Non-polymers , 2 types, 3 molecules 


| #66: Chemical | ChemComp-MG / |
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| #67: Chemical |
-Details
| Has ligand of interest | N |
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| Has protein modification | Y |
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: Escherichia coli transcription-translation complex B (TTC-B) containing an 30 nt long mRNA spacer, NusG, and fMet-tRNAs at E-site and P-site Type: COMPLEX / Entity ID: #1-#65 / Source: RECOMBINANT |
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| Molecular weight | Experimental value: NO |
| Source (natural) | Organism: ![]() |
| Source (recombinant) | Organism: ![]() |
| Buffer solution | pH: 7.6 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Talos Arctica / Image courtesy: FEI Company |
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| Microscopy | Model: FEI TALOS ARCTICA |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD |
| Image recording | Electron dose: 45 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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| 3D reconstruction | Resolution: 5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 4617 / Symmetry type: POINT |
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