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- EMDB-27932: Escherichia coli Rho-dependent transcription pre-termination comp... -

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Basic information

Entry
Database: EMDB / ID: EMD-27932
TitleEscherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA, Mg-ADP-BeF3, and NusG; Rho hexamer part
Map dataEscherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA, Mg-ADP-BeF3, and NusG; Rho hexamer part
Sample
  • Complex: Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA, Mg-ADP-BeF3, and NusG; Rho hexamer part
    • DNA: dC75 RNA
    • Protein or peptide: Transcription termination factor Rho
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: MAGNESIUM ION
  • Ligand: BERYLLIUM TRIFLUORIDE ION
Function / homology
Function and homology information


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
Transcription termination factor Rho / Rho termination factor, N-terminal / Rho termination factor, RNA-binding domain / Transcription termination factor Rho, ATP binding domain / Rho termination factor, RNA-binding domain / Rho termination factor, N-terminal domain / Rho RNA-binding domain profile. / Rho termination factor, N-terminal domain / Rho termination factor, N-terminal domain superfamily / Cold shock domain ...Transcription termination factor Rho / Rho termination factor, N-terminal / Rho termination factor, RNA-binding domain / Transcription termination factor Rho, ATP binding domain / Rho termination factor, RNA-binding domain / Rho termination factor, N-terminal domain / Rho RNA-binding domain profile. / Rho termination factor, N-terminal domain / Rho termination factor, N-terminal domain superfamily / Cold shock domain / Cold shock protein domain / ATPase, F1/V1/A1 complex, alpha/beta subunit, nucleotide-binding domain / ATP synthase alpha/beta family, nucleotide-binding domain / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / Nucleic acid-binding, OB-fold / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Transcription termination factor Rho
Similarity search - Component
Biological speciesEscherichia coli (E. coli) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.1 Å
AuthorsMolodtsov V / Wang C / Ebright RH
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
Citation
Journal: Nature / Year: 2023
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: Journal: Biorxiv / Year: 2022
Title: Structural basis of Rho-dependent transcription termination
Authors: Molodtsov V / Wang C / Firlar E / Kaelber JT / Ebright RH
History
DepositionAug 23, 2022-
Header (metadata) releaseSep 7, 2022-
Map releaseSep 7, 2022-
UpdateFeb 22, 2023-
Current statusFeb 22, 2023Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_27932.png

Downloads & links

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Map

FileDownload / File: emd_27932.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationEscherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA, Mg-ADP-BeF3, and NusG; Rho hexamer part
Voxel sizeX=Y=Z: 1.069 Å
Density
Contour LevelBy AUTHOR: 0.0016
Minimum - Maximum-0.0045121773 - 0.022203369
Average (Standard dev.)8.318035e-06 (±0.0008373374)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 410.496 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: Half-map 2 Escherichia coli Rho-dependent transcription pre-termination complex...

Fileemd_27932_half_map_1.map
AnnotationHalf-map 2 Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA, Mg-ADP-BeF3, and NusG; Rho hexamer part
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half-map 1 Escherichia coli Rho-dependent transcription pre-termination complex...

Fileemd_27932_half_map_2.map
AnnotationHalf-map 1 Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA, Mg-ADP-BeF3, and NusG; Rho hexamer part
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Escherichia coli Rho-dependent transcription pre-termination comp...

EntireName: Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA, Mg-ADP-BeF3, and NusG; Rho hexamer part
Components
  • Complex: Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA, Mg-ADP-BeF3, and NusG; Rho hexamer part
    • DNA: dC75 RNA
    • Protein or peptide: Transcription termination factor Rho
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: MAGNESIUM ION
  • Ligand: BERYLLIUM TRIFLUORIDE ION

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Supramolecule #1: Escherichia coli Rho-dependent transcription pre-termination comp...

SupramoleculeName: Escherichia coli Rho-dependent transcription pre-termination complex containing 18 nt long RNA spacer, dC75 rut mimic RNA, Mg-ADP-BeF3, and NusG; Rho hexamer part
type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Escherichia coli (E. coli)

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Macromolecule #1: dC75 RNA

MacromoleculeName: dC75 RNA / type: dna / ID: 1 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 22.860457 KDa
SequenceString: (DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC) (DC)(DC)(DC)(DC)(DC)(DT)(DC)(DC)(DC)(DC) (DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC) (DC)(DC)(DT)(DC)(DC)(DC)(DC)(DC)(DC)(DC) (DC) (DC)(DC)(DC)(DC)(DC)(DC) ...String:
(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC) (DC)(DC)(DC)(DC)(DC)(DT)(DC)(DC)(DC)(DC) (DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC) (DC)(DC)(DT)(DC)(DC)(DC)(DC)(DC)(DC)(DC) (DC) (DC)(DC)(DC)(DC)(DC)(DC)(DC)(DT) (DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC) (DC)(DC) (DC)(DC)(DC)(DT)(DC)(DC)(DC) (DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC)(DC) (DC)(DC)

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Macromolecule #2: Transcription termination factor Rho

MacromoleculeName: Transcription termination factor Rho / type: protein_or_peptide / ID: 2 / Number of copies: 6 / Enantiomer: LEVO
EC number: Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 47.070168 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MNLTELKNTP VSELITLGEN MGLENLARMR KQDIIFAILK QHAKSGEDIF GDGVLEILQD GFGFLRSADS SYLAGPDDIY VSPSQIRRF NLRTGDTISG KIRPPKEGER YFALLKVNEV NFDKPENARN KILFENLTPL HANSRLRMER GNGSTEDLTA R VLDLASPI ...String:
MNLTELKNTP VSELITLGEN MGLENLARMR KQDIIFAILK QHAKSGEDIF GDGVLEILQD GFGFLRSADS SYLAGPDDIY VSPSQIRRF NLRTGDTISG KIRPPKEGER YFALLKVNEV NFDKPENARN KILFENLTPL HANSRLRMER GNGSTEDLTA R VLDLASPI GRGQRGLIVA PPKAGKTMLL QNIAQSIAYN HPDCVLMVLL IDERPEEVTE MQRLVKGEVV ASTFDEPASR HV QVAEMVI EKAKRLVEHK KDVIILLDSI TRLARAYNTV VPASGKVLTG GVDANALHRP KRFFGAARNV EEGGSLTIIA TAL IDTGSK MDEVIYEEFK GTGNMELHLS RKIAEKRVFP AIDYNRSGTR KEELLTTQEE LQKMWILRKI IHPMGEIDAM EFLI NKLAM TKTNDDFFEM MKRS

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Macromolecule #3: ADENOSINE-5'-DIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 3 / Number of copies: 6 / Formula: ADP
Molecular weightTheoretical: 427.201 Da
Chemical component information

ChemComp-ADP:
ADENOSINE-5'-DIPHOSPHATE / ADP, energy-carrying molecule*YM / Adenosine diphosphate

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Macromolecule #4: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 6 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #5: BERYLLIUM TRIFLUORIDE ION

MacromoleculeName: BERYLLIUM TRIFLUORIDE ION / type: ligand / ID: 5 / Number of copies: 6 / Formula: BEF
Molecular weightTheoretical: 66.007 Da
Chemical component information

ChemComp-BEF:
BERYLLIUM TRIFLUORIDE ION

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.9
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.25 µm
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 35.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: COMMON LINE
Final angle assignmentType: COMMON LINE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 194518

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