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- PDB-8jo2: Structural basis of transcriptional activation by the OmpR/PhoB-f... -

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Entry
Database: PDB / ID: 8jo2
TitleStructural basis of transcriptional activation by the OmpR/PhoB-family response regulator PmrA
Components
  • (DNA (65-MER)) x 2
  • (DNA-directed RNA polymerase subunit ...Polymerase) x 4
  • DNA-binding transcriptional regulator BasR
  • RNA polymerase sigma factor RpoD
KeywordsTRANSCRIPTION / PmrA / RNA polymerase / cryo-EM
Function / homology
Function and homology information


RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / phosphorelay signal transduction system / bacterial-type flagellum-dependent cell motility / nitrate assimilation ...RNA polymerase complex / submerged biofilm formation / cellular response to cell envelope stress / cytosolic DNA-directed RNA polymerase complex / regulation of DNA-templated transcription initiation / sigma factor activity / bacterial-type flagellum assembly / phosphorelay signal transduction system / bacterial-type flagellum-dependent cell motility / nitrate assimilation / DNA-directed RNA polymerase complex / transcription elongation factor complex / regulation of DNA-templated transcription elongation / transcription antitermination / DNA-templated transcription initiation / cell motility / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / response to heat / protein-containing complex assembly / intracellular iron ion homeostasis / protein dimerization activity / DNA-templated transcription / regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / membrane / metal ion binding / cytosol / cytoplasm
Similarity search - Function
OmpR/PhoB-type DNA-binding domain profile. / OmpR/PhoB-type DNA-binding domain / Transcriptional regulatory protein, C terminal / Transcriptional regulatory protein, C terminal / Transcriptional regulatory protein WalR-like / 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 ...OmpR/PhoB-type DNA-binding domain profile. / OmpR/PhoB-type DNA-binding domain / Transcriptional regulatory protein, C terminal / Transcriptional regulatory protein, C terminal / Transcriptional regulatory protein WalR-like / 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 / Signal transduction response regulator, C-terminal effector / Sigma-70 factors family signature 1. / RNA polymerase sigma factor RpoD, C-terminal / RNA polymerase sigma factor RpoD / 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 / Response regulator receiver domain / cheY-homologous receiver domain / Signal transduction response regulator, receiver domain / Response regulatory domain profile. / CheY-like superfamily / 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 / RNA polymerase Rpb6 / RNA polymerase, subunit omega/Rpo6/RPB6 / RNA polymerase Rpb6 / RNA polymerase Rpb1, domain 3 superfamily / RNA polymerase Rpb1, clamp domain superfamily / RPB6/omega subunit-like superfamily / DNA-directed RNA polymerase, subunit beta-prime / RNA polymerase Rpb2, domain 2 superfamily / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 3 / RNA polymerase Rpb1, domain 1 / RNA polymerase Rpb1, domain 1 / RNA polymerase, alpha subunit / RNA polymerase Rpb1, domain 4 / RNA polymerase Rpb1, domain 2 / RNA polymerase Rpb1, domain 4 / RNA polymerase, beta subunit, protrusion / RNA polymerase beta subunit / RNA polymerase, N-terminal / RNA polymerase Rpb1, funnel domain superfamily / RNA polymerase I subunit A N-terminus / RNA polymerase Rpb1, domain 5 / RNA polymerase Rpb1, domain 5 / 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 / DNA-directed RNA polymerase, insert domain superfamily / 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 / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA-binding transcriptional regulator BasR / DNA-directed RNA polymerase subunit beta' / DNA-directed RNA polymerase subunit beta / DNA-directed RNA polymerase subunit alpha / DNA-directed RNA polymerase subunit omega / RNA polymerase sigma factor RpoD
Similarity search - Component
Biological speciesEscherichia coli BL21 (bacteria)
Klebsiella pneumoniae JM45 (bacteria)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.74 Å
AuthorsLou, Y.-C. / Huang, H.-Y. / Chen, C. / Wu, K.-P.
Funding support Taiwan, 3items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, Taiwan)MOST 110-2311-B-001-046 Taiwan
Ministry of Science and Technology (MoST, Taiwan)MOST 108-2311-B-001-016-MY3 Taiwan
Academia Sinica (Taiwan)AS-CDA-110-L03 Taiwan
CitationJournal: Nucleic Acids Res / Year: 2023
Title: Structural basis of transcriptional activation by the OmpR/PhoB-family response regulator PmrA.
Authors: Yuan-Chao Lou / Hsuan-Yu Huang / Hsin-Hong Yeh / Wei-Hung Chiang / Chinpan Chen / Kuen-Phon Wu /
Abstract: PmrA, an OmpR/PhoB-family response regulator, triggers gene transcription responsible for polymyxin resistance in bacteria by recognizing promoters where the canonical-35 element is replaced by the ...PmrA, an OmpR/PhoB-family response regulator, triggers gene transcription responsible for polymyxin resistance in bacteria by recognizing promoters where the canonical-35 element is replaced by the pmra-box, representing the PmrA recognition sequence. Here, we report a cryo-electron microscopy (cryo-EM) structure of a bacterial PmrA-dependent transcription activation complex (TAC) containing a PmrA dimer, an RNA polymerase σ70 holoenzyme (RNAPH) and the pbgP promoter DNA. Our structure reveals that the RNAPH mainly contacts the PmrA C-terminal DNA-binding domain (DBD) via electrostatic interactions and reorients the DBD three base pairs upstream of the pmra-box, resulting in a dynamic TAC conformation. In vivo assays show that the substitution of the DNA-recognition residue eliminated its transcriptional activity, while variants with altered RNAPH-interacting residues resulted in enhanced transcriptional activity. Our findings suggest that both PmrA recognition-induced DNA distortion and PmrA promoter escape play crucial roles in its transcriptional activation.
History
DepositionJun 6, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 30, 2023Provider: repository / Type: Initial release
Revision 1.1Sep 13, 2023Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2Oct 25, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
1: DNA (65-MER)
2: DNA (65-MER)
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
H: DNA-binding transcriptional regulator BasR
I: DNA-binding transcriptional regulator BasR


Theoretical massNumber of molelcules
Total (without water)550,99710
Polymers550,99710
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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DNA chain , 2 types, 2 molecules 12

#1: DNA chain DNA (65-MER)


Mass: 20107.924 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#2: DNA chain DNA (65-MER)


Mass: 20027.875 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

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

#3: Protein DNA-directed RNA polymerase subunit alpha / Polymerase / 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 BL21(DE3) (bacteria) / Gene: rpoA, pez, phs, sez, b3295, JW3257 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P0A7Z4, DNA-directed RNA polymerase
#4: Protein DNA-directed RNA polymerase subunit beta / Polymerase


Mass: 150820.875 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli BL21(DE3) (bacteria) / Gene: rpoB / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: A0A140SS80
#5: Protein DNA-directed RNA polymerase subunit beta' / Polymerase


Mass: 155366.781 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli BL21(DE3) (bacteria) / Gene: rpoC / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: A0A140NH27
#6: Protein DNA-directed RNA polymerase subunit omega / Polymerase / 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 BL21(DE3) (bacteria) / Gene: rpoZ, b3649, JW3624 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P0A800, DNA-directed RNA polymerase

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Protein , 2 types, 3 molecules FHI

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


Mass: 70352.242 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli BL21(DE3) (bacteria) / Gene: rpoD / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q0P6L9
#8: Protein DNA-binding transcriptional regulator BasR


Mass: 25477.045 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Klebsiella pneumoniae JM45 (bacteria) / Gene: N559_3529 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: A0A0R4I965

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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: Structural basis of transcriptional activation by the OmpR/PhoB-family response regulator PmrA
Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)Organism: Escherichia coli BL21(DE3) (bacteria)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7.3
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2200 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 57.1 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 QUANTUM (4k x 4k)

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Processing

CTF correctionType: NONE
3D reconstructionResolution: 2.74 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 219627 / Symmetry type: POINT
Atomic model buildingProtocol: AB INITIO MODEL

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