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- PDB-7pp4: Cryo-EM structure of Mycobacterium tuberculosis RNA polymerase ho... -
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Open data
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Basic information
Entry | Database: PDB / ID: 7pp4 | ||||||
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Title | Cryo-EM structure of Mycobacterium tuberculosis RNA polymerase holoenzyme comprising sigma factor SigB | ||||||
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![]() | TRANSCRIPTION / DNA-dependent RNA polymerase / alternative sigma | ||||||
Function / homology | ![]() RNA polymerase core enzyme binding / Antimicrobial action and antimicrobial resistance in Mtb / sigma factor activity / DNA-directed RNA polymerase complex / peptidoglycan-based cell wall / DNA-templated transcription initiation / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / response to heat ...RNA polymerase core enzyme binding / Antimicrobial action and antimicrobial resistance in Mtb / sigma factor activity / DNA-directed RNA polymerase complex / peptidoglycan-based cell wall / DNA-templated transcription initiation / ribonucleoside binding / DNA-directed 5'-3' RNA polymerase activity / DNA-directed RNA polymerase / response to heat / protein dimerization activity / response to hypoxia / response to xenobiotic stimulus / response to antibiotic / DNA-templated transcription / positive regulation of DNA-templated transcription / magnesium ion binding / DNA binding / zinc ion binding / plasma membrane / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.84 Å | ||||||
![]() | Brodolin, K. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of the mycobacterial stress-response RNA polymerase auto-inhibition via oligomerization Authors: Morichaud, Z. / Trapani, S. / Vishwakarma, R. / Chaloin, L. / Lionne, C. / Lai-Kee-Him, J. / Bron, P. / Brodolin, K. #1: ![]() Title: Real-space refinement in PHENIX for cryo-EM and crystallography Authors: Afonine, P.V. / Poon, B.K. / Read, R.J. / Sobolev, O.V. / Terwilliger, T.C. / Urzhumtsev, A. / Adams, P.D. #2: Journal: Nucleic Acids Res / Year: 2014 Title: Mycobacterium RbpA cooperates with the stress-response σB subunit of RNA polymerase in promoter DNA unwinding. Authors: Yangbo Hu / Zakia Morichaud / Ayyappasamy Sudalaiyadum Perumal / Françoise Roquet-Baneres / Konstantin Brodolin / ![]() Abstract: RbpA, a transcriptional activator that is essential for Mycobacterium tuberculosis replication and survival during antibiotic treatment, binds to RNA polymerase (RNAP) in the absence of promoter DNA. ...RbpA, a transcriptional activator that is essential for Mycobacterium tuberculosis replication and survival during antibiotic treatment, binds to RNA polymerase (RNAP) in the absence of promoter DNA. It has been hypothesized that RbpA stimulates housekeeping gene expression by promoting assembly of the σ(A) subunit with core RNAP. Here, using a purified in vitro transcription system of M. tuberculosis, we show that RbpA functions in a promoter-dependent manner as a companion of RNAP essential for promoter DNA unwinding and formation of the catalytically active open promoter complex (RPo). Screening for RbpA activity using a full panel of the M. tuberculosis σ subunits demonstrated that RbpA targets σ(A) and stress-response σ(B), but not the alternative σ subunits from the groups 3 and 4. In contrast to σ(A), the σ(B) subunit activity displayed stringent dependency upon RbpA. These results suggest that RbpA-dependent control of RPo formation provides a mechanism for tuning gene expression during the switch between different physiological states, and in the stress response. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 547.1 KB | Display | ![]() |
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PDB format | ![]() | 431.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.2 MB | Display | ![]() |
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Full document | ![]() | 1.2 MB | Display | |
Data in XML | ![]() | 79.9 KB | Display | |
Data in CIF | ![]() | 115.9 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 13579MC 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
-DNA-directed RNA polymerase subunit ... , 4 types, 5 molecules abcde
#1: Protein | Mass: 37745.328 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Gene: rpoA, Rv3457c, MTCY13E12.10c / Plasmid: pMR4 / Production host: ![]() ![]() #2: Protein | | Mass: 129602.344 Da / Num. of mol.: 1 / Mutation: L2E3G4C5 -> V Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Gene: rpoB, Rv0667, MTCI376.08c / Plasmid: pMR4 / Production host: ![]() ![]() #3: Protein | | Mass: 147797.812 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Details: contains C-terminal 6xHis-tag Source: (gene. exp.) ![]() Gene: rpoC, Rv0668, MTCI376.07c / Plasmid: pMR4 / Production host: ![]() ![]() #4: Protein | | Mass: 11851.140 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Gene: rpoZ, Rv1390, MTCY21B4.07 / Plasmid: pMR4 / Production host: ![]() ![]() |
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-Protein , 1 types, 1 molecules f
#5: Protein | Mass: 38572.773 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Details: contains N-terminal 6xHist-tag Source: (gene. exp.) ![]() Gene: sigB, mysB, Rv2710 / Plasmid: pET28a Details (production host): derivative containing Rv2710 gene Production host: ![]() ![]() |
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-Non-polymers , 2 types, 3 molecules ![](data/chem/img/ZN.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/MG.gif)
#6: Chemical | #7: Chemical | ChemComp-MG / | |
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-Details
Has ligand of interest | Y |
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-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: RNA polymerase holoenzyme with sigma factor SigB / Type: COMPLEX Details: RNA polymerase holoenzyme assembled from individually expressed RNA polymerase core and sigma factor SigB Entity ID: #1-#5 / Source: RECOMBINANT |
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Molecular weight | Value: 0.4 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.9 |
Specimen | Conc.: 1.4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid type: Quantifoil R2/2 |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 49.6 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of real images: 3064 |
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Processing
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.84 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 115112 / Algorithm: FOURIER SPACE / Symmetry type: POINT | |||||||||||||||||||||||||||
Atomic model building | Protocol: RIGID BODY FIT / Space: REAL | |||||||||||||||||||||||||||
Atomic model building | PDB-ID: 6FBV | |||||||||||||||||||||||||||
Refinement | Highest resolution: 3.84 Å / Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | |||||||||||||||||||||||||||
Displacement parameters | Biso mean: 64.12 Å2 | |||||||||||||||||||||||||||
Refine LS restraints |
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