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- EMDB-18131: Bacterial transcription termination factor Rho + pppGpp -

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Basic information

Entry
Database: EMDB / ID: EMD-18131
TitleBacterial transcription termination factor Rho + pppGpp
Map data
Sample
  • Complex: Filament of Rho mutant G150D
    • Protein or peptide: Transcription termination factor Rho
  • Ligand: guanosine 5'-(tetrahydrogen triphosphate) 3'-(trihydrogen diphosphate)
  • Ligand: MAGNESIUM ION
KeywordsRho / termination / TRANSCRIPTION
Function / homology
Function and homology information


ATP-dependent activity, acting on RNA / DNA-templated transcription termination / helicase activity / 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 / Nucleic acid-binding, OB-fold / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Transcription termination factor Rho
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.0 Å
AuthorsSaid N / Hilal T / Wahl MC
Funding support Germany, 1 items
OrganizationGrant numberCountry
German Research Foundation (DFG)433623608 Germany
CitationJournal: bioRxiv / Year: 2023
Title: Transcription termination factor ρ polymerizes under stress.
Authors: Bing Wang / Nelly Said / Tarek Hilal / Mark Finazzo / Markus C Wahl / Irina Artsimovitch /
Abstract: Bacterial RNA helicase ρ is a genome sentinel that terminates synthesis of damaged and junk RNAs that are not translated by the ribosome. Co-transcriptional RNA surveillance by ρ is essential for ...Bacterial RNA helicase ρ is a genome sentinel that terminates synthesis of damaged and junk RNAs that are not translated by the ribosome. Co-transcriptional RNA surveillance by ρ is essential for quality control of the transcriptome during optimal growth. However, it is unclear how bacteria protect their RNAs from overzealous ρ during dormancy or stress, conditions common in natural habitats. Here we used cryogenic electron microscopy, biochemical, and genetic approaches to show that residue substitutions, ADP, or ppGpp promote hyper-oligomerization of ρ. Our results demonstrate that nucleotides bound at subunit interfaces control ρ switching from active hexamers to inactive higher-order oligomers and extended filaments. Polymers formed upon exposure to antibiotics or ppGpp disassemble when stress is relieved, thereby directly linking termination activity to cellular physiology. Inactivation of ρ through hyper-oligomerization is a regulatory strategy shared by RNA polymerases, ribosomes, and metabolic enzymes across all life.
History
DepositionAug 4, 2023-
Header (metadata) releaseSep 27, 2023-
Map releaseSep 27, 2023-
UpdateJul 9, 2025-
Current statusJul 9, 2025Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_18131.png

Downloads & links

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Map

FileDownload / File: emd_18131.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 384 pix.
= 319.488 Å		0.83 Å/pix.
x 384 pix.
= 319.488 Å		0.83 Å/pix.
x 384 pix.
= 319.488 Å

Surface

Projections

Slices (1/3)

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.832 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.25
Minimum - Maximum-0.0 - 2.3005872
Average (Standard dev.)0.0057545514 (±0.045566667)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 319.488 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_18131_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_18131_half_map_2.map
Projections & Slices
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Histogram

Histogram (log scale)

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Sample components

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Entire : Filament of Rho mutant G150D

EntireName: Filament of Rho mutant G150D
Components
  • Complex: Filament of Rho mutant G150D
    • Protein or peptide: Transcription termination factor Rho
  • Ligand: guanosine 5'-(tetrahydrogen triphosphate) 3'-(trihydrogen diphosphate)
  • Ligand: MAGNESIUM ION

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Supramolecule #1: Filament of Rho mutant G150D

SupramoleculeName: Filament of Rho mutant G150D / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Escherichia coli (E. coli)

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Macromolecule #1: Transcription termination factor Rho

MacromoleculeName: Transcription termination factor Rho / type: protein_or_peptide / ID: 1 / 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

UniProtKB: Transcription termination factor Rho

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Macromolecule #2: guanosine 5'-(tetrahydrogen triphosphate) 3'-(trihydrogen diphosphate)

MacromoleculeName: guanosine 5'-(tetrahydrogen triphosphate) 3'-(trihydrogen diphosphate)
type: ligand / ID: 2 / Number of copies: 4 / Formula: 0O2
Molecular weightTheoretical: 683.14 Da
Chemical component information

ChemComp-0O2:
guanosine 5'-(tetrahydrogen triphosphate) 3'-(trihydrogen diphosphate)

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Macromolecule #3: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 3 / Number of copies: 1 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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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

Concentration2.4 mg/mL
BufferpH: 7.6
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 283 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 1631 / Average exposure time: 40.57 sec. / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.9 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 721486
CTF correctionSoftware - Name: cryoSPARC (ver. v3.3.2) / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: OTHER
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 3.0 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. v3.3.2) / Number images used: 200796
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. v3.3.2)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. v3.3.2)
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: RIGID BODY FIT / Overall B value: 101.7
Output model

PDB-8q3o:
Bacterial transcription termination factor Rho + pppGpp

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