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- PDB-6ldi: The cryo-EM structure of E. coli CueR transcription activation complex -

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Basic information

Entry
Database: PDB / ID: 6ldi
TitleThe cryo-EM structure of E. coli CueR transcription activation complex
Components
  • (DNA (50-MER)) x 2
  • (DNA-directed RNA polymerase subunit ...) x 4
  • HTH-type transcriptional regulator CueR
  • RNA (5'-R(*CP*UP*CP*GP*A)-3')
  • RNA polymerase sigma factor RpoD
KeywordsTRANSCRIPTION (DNA to RNA) / RNA polymerase / CueR / transcription activation / TRANSCRIPTION
Function / homology
Function and homology information


sigma factor antagonist complex / DNA-binding transcription activator activity / RNA polymerase complex / submerged biofilm formation / 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 / sigma factor activity / bacterial-type flagellum assembly ...sigma factor antagonist complex / DNA-binding transcription activator activity / RNA polymerase complex / submerged biofilm formation / 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 / sigma factor activity / bacterial-type flagellum assembly / bacterial-type flagellum-dependent cell motility / cis-regulatory region sequence-specific DNA binding / nitrate assimilation / transcription elongation factor complex / regulation of DNA-templated transcription elongation / transcription antitermination / DNA-templated transcription initiation / cell motility / protein-DNA complex / ribonucleoside binding / : / : / : / : / : / : / DNA-directed RNA polymerase / response to heat / protein-containing complex assembly / intracellular iron ion homeostasis / protein dimerization activity / transcription cis-regulatory region binding / copper ion binding / DNA-binding transcription factor activity / response to antibiotic / negative regulation of DNA-templated transcription / DNA-templated transcription / positive regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / identical protein binding / membrane / cytosol / cytoplasm
Similarity search - Function
Cu(I)-responsive transcriptional regulator / MerR, DNA binding / MerR family regulatory protein / MerR-type HTH domain signature. / : / MerR HTH family regulatory protein / helix_turn_helix, mercury resistance / MerR-type HTH domain profile. / MerR-type HTH domain / RNA polymerase sigma factor 70, non-essential domain ...Cu(I)-responsive transcriptional regulator / MerR, DNA binding / MerR family regulatory protein / MerR-type HTH domain signature. / : / MerR HTH family regulatory protein / helix_turn_helix, mercury resistance / MerR-type HTH domain profile. / MerR-type HTH domain / RNA polymerase sigma factor 70, non-essential domain / Sigma-70, non-essential region / RNA polymerase sigma factor 70, region 1.1 / Sigma-70 factor, region 1.1 superfamily / Sigma-70 factor, region 1.1 / Putative DNA-binding domain superfamily / RNA polymerase II, Rpb2 subunit, wall domain / RNA polymerase Rpb1 funnel domain / Sigma-70 factors family signature 1. / RNA polymerase sigma factor RpoD, C-terminal / RNA polymerase sigma factor RpoD / Topoisomerase I; Chain A, domain 4 / : / RNA polymerase sigma-70 region 1.2 / Sigma-70 factor, region 1.2 / RNA polymerase sigma-70 region 3 / Sigma-70 region 3 / Sigma-70 factors family signature 2. / RNA polymerase sigma-70 / RNA polymerase sigma-70 region 4 / Sigma-70, region 4 / RNA polymerase sigma-70 region 2 / RNA polymerase sigma-70 like domain / Sigma-70 region 2 / RNA polymerase sigma factor, region 2 / RNA polymerase sigma factor, region 3/4-like / DNA-directed RNA polymerase, omega subunit / DNA-directed RNA polymerase, subunit beta-prime, bacterial type / DNA-directed RNA polymerase, beta subunit, external 1 domain superfamily / DNA-directed RNA polymerase, beta subunit, external 1 domain / RNA polymerase beta subunit external 1 domain / RNA polymerase, alpha subunit, C-terminal / Bacterial RNA polymerase, alpha chain C terminal domain / DNA-directed RNA polymerase, alpha subunit / DNA-directed RNA polymerase beta subunit, bacterial-type / DNA-directed RNA polymerase, subunit beta-prime / Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain / RNA polymerase Rpb6 / RNA polymerase, subunit omega/Rpo6/RPB6 / RNA polymerase Rpb6 / RNA polymerase Rpb2, domain 2 superfamily / RNA polymerase Rpb1, domain 3 superfamily / RPB6/omega subunit-like superfamily / DNA-directed RNA polymerase, insert domain / DNA-directed RNA polymerase, RpoA/D/Rpb3-type / RNA polymerase Rpb3/RpoA insert domain / RNA polymerase Rpb3/Rpb11 dimerisation domain / RNA polymerases D / RNA polymerase Rpb1, clamp domain superfamily / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 1 / RNA polymerase Rpb1, domain 1 / RNA polymerase, beta subunit, protrusion / RNA polymerase beta subunit / RNA polymerase, alpha subunit / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 4 / RNA polymerase Rpb1, domain 2 / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 4 / DNA-directed RNA polymerase, insert domain superfamily / RNA polymerase, N-terminal / RNA polymerase Rpb1, funnel domain superfamily / RNA polymerase I subunit A N-terminus / RNA polymerase, RBP11-like subunit / RNA polymerase Rpb2, domain 2 / RNA polymerase Rpb2, domain 2 / RNA polymerase, beta subunit, conserved site / RNA polymerase Rpb2, domain 7 / RNA polymerase Rpb2, domain 3 / RNA polymerase Rpb2, OB-fold / RNA polymerase Rpb2, domain 7 / RNA polymerase Rpb2, domain 3 / RNA polymerases beta chain signature. / DNA-directed RNA polymerase, subunit 2, hybrid-binding domain / DNA-directed RNA polymerase, subunit 2 / DNA-directed RNA polymerase, subunit 2, hybrid-binding domain superfamily / RNA polymerase Rpb2, domain 6 / OB fold (Dihydrolipoamide Acetyltransferase, E2P) / Arc Repressor Mutant, subunit A / Winged helix-like DNA-binding domain superfamily / Beta Barrel / Orthogonal Bundle / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
SILVER ION / DNA / DNA (> 10) / RNA / RNA polymerase sigma factor RpoD / DNA-directed RNA polymerase subunit alpha / DNA-directed RNA polymerase subunit omega / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit beta / HTH-type transcriptional regulator CueR
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.69 Å
AuthorsFang, C.L. / Zhang, Y.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China31822001 China
CitationJournal: Nat Chem Biol / Year: 2021
Title: CueR activates transcription through a DNA distortion mechanism.
Authors: Chengli Fang / Steven J Philips / Xiaoxian Wu / Kui Chen / Jing Shi / Liqiang Shen / Juncao Xu / Yu Feng / Thomas V O'Halloran / Yu Zhang /
Abstract: The MerR-family transcription factors (TFs) are a large group of bacterial proteins responding to cellular metal ions and multiple antibiotics by binding within central RNA polymerase-binding regions ...The MerR-family transcription factors (TFs) are a large group of bacterial proteins responding to cellular metal ions and multiple antibiotics by binding within central RNA polymerase-binding regions of a promoter. While most TFs alter transcription through protein-protein interactions, MerR TFs are capable of reshaping promoter DNA. To address the question of which mechanism prevails, we determined two cryo-EM structures of transcription activation complexes (TAC) comprising Escherichia coli CueR (a prototype MerR TF), RNAP holoenzyme and promoter DNA. The structures reveal that this TF promotes productive promoter-polymerase association without canonical protein-protein contacts seen between other activator proteins and RNAP. Instead, CueR realigns the key promoter elements in the transcription activation complex by clamp-like protein-DNA interactions: these induce four distinct kinks that ultimately position the -10 element for formation of the transcription bubble. These structural and biochemical results provide strong support for the DNA distortion paradigm of allosteric transcriptional control by MerR TFs.
History
DepositionNov 21, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Sep 30, 2020Provider: repository / Type: Initial release
Revision 1.1Oct 21, 2020Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation_author.name
Revision 1.2Dec 30, 2020Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.year
Revision 1.3Mar 27, 2024Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type

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Structure visualization

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Assembly

Deposited unit
A: DNA-directed RNA polymerase subunit alpha
B: DNA-directed RNA polymerase subunit alpha
C: DNA-directed RNA polymerase subunit beta
D: DNA-directed RNA polymerase subunit beta'
E: DNA-directed RNA polymerase subunit omega
F: RNA polymerase sigma factor RpoD
1: DNA (50-MER)
2: DNA (50-MER)
3: RNA (5'-R(*CP*UP*CP*GP*A)-3')
G: HTH-type transcriptional regulator CueR
H: HTH-type transcriptional regulator CueR
hetero molecules


Theoretical massNumber of molelcules
Total (without water)527,20515
Polymers526,94211
Non-polymers2634
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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DNA-directed RNA polymerase subunit ... , 4 types, 5 molecules ABCDE

#1: Protein DNA-directed RNA polymerase subunit alpha / RNAP subunit alpha / RNA polymerase subunit alpha / Transcriptase subunit alpha


Mass: 36558.680 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (strain K12) (bacteria)
Strain: K12 / Gene: rpoA, pez, phs, sez, b3295, JW3257 / Production host: Escherichia coli (E. coli) / References: UniProt: P0A7Z4, DNA-directed RNA polymerase
#2: Protein DNA-directed RNA polymerase subunit beta / RNAP subunit beta / RNA polymerase subunit beta / Transcriptase subunit beta


Mass: 150820.875 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (strain K12) (bacteria)
Strain: K12
Gene: rpoB, groN, nitB, rif, ron, stl, stv, tabD, b3987, JW3950
Production host: Escherichia coli (E. coli) / References: UniProt: P0A8V2, DNA-directed RNA polymerase
#3: Protein DNA-directed RNA polymerase subunit beta' / RNAP subunit beta' / RNA polymerase subunit beta' / Transcriptase subunit beta'


Mass: 156537.031 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (strain K12) (bacteria)
Strain: K12 / Gene: rpoC, tabB, b3988, JW3951 / Production host: Escherichia coli (E. coli) / References: UniProt: P0A8T7, DNA-directed RNA polymerase
#4: Protein DNA-directed RNA polymerase subunit omega / RNAP omega subunit / RNA polymerase omega subunit / Transcriptase subunit omega


Mass: 10249.547 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (strain K12) (bacteria)
Strain: K12 / Gene: rpoZ, b3649, JW3624 / Production host: Escherichia coli (E. coli) / References: UniProt: P0A800, DNA-directed RNA polymerase

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Protein , 2 types, 3 molecules FGH

#5: Protein RNA polymerase sigma factor RpoD / Sigma-70


Mass: 72523.633 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (strain K12) (bacteria)
Strain: K12 / Gene: rpoD, alt, b3067, JW3039 / Production host: Escherichia coli (E. coli) / References: UniProt: P00579
#9: Protein HTH-type transcriptional regulator CueR / Copper efflux regulator / Copper export regulator


Mass: 15586.570 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (strain K12) (bacteria)
Strain: K12 / Gene: cueR, copR, ybbI, b0487, JW0476 / Production host: Escherichia coli (E. coli) / References: UniProt: P0A9G4

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DNA chain , 2 types, 2 molecules 12

#6: DNA chain DNA (50-MER)


Mass: 15415.855 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#7: DNA chain DNA (50-MER)


Mass: 15559.003 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

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RNA chain , 1 types, 1 molecules 3

#8: RNA chain RNA (5'-R(*CP*UP*CP*GP*A)-3')


Mass: 1545.984 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

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Non-polymers , 3 types, 4 molecules

#10: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn
#11: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION
#12: Chemical ChemComp-AG / SILVER ION


Mass: 107.868 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ag / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Escherichia coli CueR transcription activation complex
Type: COMPLEX / Entity ID: #1-#9 / Source: RECOMBINANT
Molecular weightValue: 0.507 MDa / Experimental value: NO
Source (natural)Organism: Escherichia coli K-12 (bacteria)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 8
Buffer component
IDConc.NameFormulaBuffer-ID
110 mmol/LHEPESC8H18N2O4S1
250 mmol/LPotassium ChlorideKCl1
35 mmol/LMagnesium chlorideMgCl21
43 mmol/LDL-DithiothreitolC4H10O2S21
SpecimenConc.: 15 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: C-flat-1.2/1.3 4C
VitrificationInstrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 282.65 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Cs: 2.7 mm
Image recordingAverage exposure time: 12 sec. / Electron dose: 56 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 2278
Image scansMovie frames/image: 32

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Processing

EM software
IDNameVersionCategory
1RELION3particle selection
4RELION3CTF correction
7UCSF Chimera1.10.2model fitting
9RELION3initial Euler assignment
10RELION3final Euler assignment
11RELION3classification
12RELION33D reconstruction
13PHENIX1.14model refinement
CTF correctionType: NONE
Particle selectionNum. of particles selected: 617318
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.69 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 184524 / Algorithm: FOURIER SPACE / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT
Atomic model building
IDPDB-ID 3D fitting-IDAccession codeInitial refinement model-IDSource nameType
16B6H

6b6h

16B6H1PDBexperimental model
24WLS

4wls

14WLS2PDBexperimental model

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