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- PDB-8e3h: Escherichia coli Rho-dependent transcription pre-termination comp... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8e3h | ||||||
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Title | Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, Mg-ADP-BeF3, and NusG; Rho hexamer part | ||||||
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![]() | TRANSCRIPTION/RNA / factor-dependent termination / Rho / transcription termination / transcription elongation complex / helicase / ATPase / TRANSCRIPTION-RNA complex | ||||||
Function / homology | ![]() ATP-dependent activity, acting on RNA / helicase activity / DNA-templated transcription termination / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / ATP hydrolysis activity / RNA binding / ATP binding / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() synthetic construct (others) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 6.5 Å | ||||||
![]() | Molodtsov, V. / Wang, C. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of Rho-dependent transcription termination. Authors: Vadim Molodtsov / Chengyuan Wang / Emre Firlar / Jason T Kaelber / Richard H Ebright / ![]() Abstract: Rho is a ring-shaped hexameric ATP-dependent molecular motor. Together with the transcription elongation factor NusG, Rho mediates factor-dependent transcription termination and transcription- ...Rho is a ring-shaped hexameric ATP-dependent molecular motor. Together with the transcription elongation factor NusG, Rho mediates factor-dependent transcription termination and transcription-translation-coupling quality control in Escherichia coli. Here we report the preparation of complexes that are functional in factor-dependent transcription termination from Rho, NusG, RNA polymerase (RNAP), and synthetic nucleic acid scaffolds, and we report cryogenic electron microscopy structures of the complexes. The structures show that functional factor-dependent pre-termination complexes contain a closed-ring Rho hexamer; have RNA threaded through the central channel of Rho; have 60 nucleotides of RNA interacting sequence-specifically with the exterior of Rho and 6 nucleotides of RNA interacting sequence-specifically with the central channel of Rho; have Rho oriented relative to RNAP such that ATP-dependent translocation by Rho exerts mechanical force on RNAP; and have NusG bridging Rho and RNAP. The results explain five decades of research on Rho and provide a foundation for understanding Rho's function. #1: ![]() Title: Structural basis of Rho-dependent transcription termination Authors: Molodtsov, V. / Wang, C. / Firlar, E. / Kaelber, J.T. / Ebright, R.H. | ||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 438.6 KB | Display | ![]() |
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PDB format | ![]() | 363.7 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.4 MB | Display | ![]() |
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Full document | ![]() | 1.5 MB | Display | |
Data in XML | ![]() | 69.3 KB | Display | |
Data in CIF | ![]() | 105.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 27865MC ![]() 8e3fC ![]() 8e5kC ![]() 8e5lC ![]() 8e5oC ![]() 8e5pC ![]() 8e6wC ![]() 8e6xC ![]() 8e6zC ![]() 8e70C 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
#1: RNA chain | Mass: 11075.324 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) | ||||||||
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#2: Protein | Mass: 47070.168 Da / Num. of mol.: 6 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() References: UniProt: A0A0A0GPI6, Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement #3: Chemical | ChemComp-ADP / #4: Chemical | ChemComp-MG / #5: Chemical | ChemComp-BEF / Has ligand of interest | N | |
-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 Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, Mg-ADP-BeF3, and NusG; Rho hexamer part Type: COMPLEX / Entity ID: #1-#2 / Source: MULTIPLE SOURCES |
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Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.9 |
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: 6.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 15936 / Symmetry type: POINT |