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- PDB-8upr: Escherichia coli transcription-translation coupled complex class ... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8upr | ||||||
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Title | Escherichia coli transcription-translation coupled complex class A (TTC-A) containing RfaH bound to ops signal, mRNA with a 21 nt long spacer, and fMet-tRNAs in E-site and P-site of the ribosome | ||||||
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![]() | TRANSCRIPTION / translation / RfaH / gene expression / regulation / ops / ribosome / coupling | ||||||
Function / homology | ![]() transcription antitermination factor activity, DNA binding / negative regulation of cytoplasmic translational initiation / RNA polymerase complex / transcription elongation-coupled chromatin remodeling / submerged biofilm formation / stringent response / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / bacterial-type RNA polymerase core enzyme binding / regulation of DNA-templated transcription initiation ...transcription antitermination factor activity, DNA binding / negative regulation of cytoplasmic translational initiation / RNA polymerase complex / transcription elongation-coupled chromatin remodeling / submerged biofilm formation / stringent response / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / bacterial-type RNA polymerase core enzyme binding / regulation of DNA-templated transcription initiation / bacterial-type flagellum assembly / misfolded RNA binding / Group I intron splicing / bacterial-type flagellum-dependent cell motility / RNA folding / nitrate assimilation / positive regulation of ribosome biogenesis / translational termination / DnaA-L2 complex / negative regulation of translational initiation / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / assembly of large subunit precursor of preribosome / positive regulation of RNA splicing / ribosome assembly / transcription elongation factor complex / cytosolic ribosome assembly / regulation of DNA-templated transcription elongation / transcription antitermination / regulation of cell growth / translational initiation / DNA-templated transcription initiation / cell motility / DNA-templated transcription termination / DNA-directed RNA polymerase activity / maintenance of translational fidelity / ribonucleoside binding / mRNA 5'-UTR binding / DNA-directed RNA polymerase / large ribosomal subunit / ribosome binding / transferase activity / ribosomal small subunit biogenesis / ribosomal small subunit assembly / response to heat / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / ribosomal large subunit assembly / protein-containing complex assembly / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / intracellular iron ion homeostasis / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / protein dimerization activity / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / response to antibiotic / mRNA binding / magnesium ion binding / DNA binding / RNA binding / zinc ion binding / membrane / cytosol / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() ![]() synthetic construct (others) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 5.3 Å | ||||||
![]() | Molodtsov, V. / Wang, C. / Ebright, R.H. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of RfaH-mediated transcription-translation coupling. Authors: Vadim Molodtsov / Chengyuan Wang / Jing Zhang / Jason T Kaelber / Gregor Blaha / Richard H Ebright / ![]() ![]() ![]() Abstract: The NusG paralog RfaH mediates bacterial transcription-translation coupling in genes that contain a DNA sequence element, termed an ops site, required for pausing RNA polymerase (RNAP) and for ...The NusG paralog RfaH mediates bacterial transcription-translation coupling in genes that contain a DNA sequence element, termed an ops site, required for pausing RNA polymerase (RNAP) and for loading RfaH onto the paused RNAP. Here, we report cryo-electron microscopy structures of transcription-translation complexes (TTCs) containing Escherichia coli RfaH. The results show that RfaH bridges RNAP and the ribosome, with the RfaH N-terminal domain interacting with RNAP and the RfaH C-terminal domain interacting with the ribosome. The results show that the distribution of translational and orientational positions of RNAP relative to the ribosome in RfaH-coupled TTCs is more restricted than in NusG-coupled TTCs because of the more restricted flexibility of the RfaH interdomain linker. The results further suggest that the structural organization of RfaH-coupled TTCs in the 'loading state', in which RNAP and RfaH are located at the ops site during formation of the TTC, is the same as the structural organization of RfaH-coupled TTCs in the 'loaded state', in which RNAP and RfaH are located at positions downstream of the ops site during function of the TTC. The results define the structural organization of RfaH-containing TTCs and set the stage for analysis of functions of RfaH during translation initiation and transcription-translation coupling. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 5.7 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.7 MB | Display | ![]() |
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Full document | ![]() | 1.8 MB | Display | |
Data in XML | ![]() | 280.2 KB | Display | |
Data in CIF | ![]() | 500.2 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 42454MC ![]() 8upoC ![]() 8uqlC ![]() 8uqmC ![]() 8uqpC ![]() 8ur0C ![]() 8urhC ![]() 8uriC ![]() 8urxC ![]() 8uryC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Protein , 2 types, 2 molecules 0AB
#1: Protein | Mass: 11586.374 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
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#12: Protein | Mass: 18364.217 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
+50S ribosomal protein ... , 31 types, 31 molecules 12349YZbcefghijklmnopqrstuvwxyz
-DNA chain , 2 types, 2 molecules 56
#6: DNA chain | Mass: 11786.552 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) synthetic construct (others) / Production host: synthetic construct (others) |
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#7: DNA chain | Mass: 11534.374 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) synthetic construct (others) / Production host: synthetic construct (others) |
-RNA chain , 5 types, 6 molecules 7ABDad
#8: RNA chain | Mass: 11993.820 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) synthetic construct (others) / Production host: 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.) ![]() ![]() Gene: rpoB, groN, nitB, rif, ron, stl, stv, tabD, b3987, JW3950 Production host: ![]() ![]() | ||||
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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.) ![]() ![]() ![]() ![]() #14: Protein | | Mass: 155366.781 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #15: Protein | | Mass: 10249.547 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
+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 coupled complex class A (TTC-A) containing RfaH bound to ops signal, mRNA with a 21 nt long spacer, and fMet-tRNAs in E-site and P-site of the ribosome Type: COMPLEX / Entity ID: #1-#64 / Source: RECOMBINANT |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
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: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1250 nm |
Image recording | Electron dose: 28 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: 5.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 10509 / Symmetry type: POINT |