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Open data
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Basic information
Entry | Database: PDB / ID: 6p19 | ||||||
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Title | Q21 transcription antitermination complex: loaded complex | ||||||
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Function / homology | ![]() negative regulation of termination of DNA-templated transcription / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Yin, Z. / Ebright, R.H. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of Q-dependent antitermination. Authors: Zhou Yin / Jason T Kaelber / Richard H Ebright / ![]() Abstract: Lambdoid bacteriophage Q protein mediates the switch from middle to late bacteriophage gene expression by enabling RNA polymerase (RNAP) to read through transcription terminators preceding ...Lambdoid bacteriophage Q protein mediates the switch from middle to late bacteriophage gene expression by enabling RNA polymerase (RNAP) to read through transcription terminators preceding bacteriophage late genes. Q loads onto RNAP engaged in promoter-proximal pausing at a Q binding element (QBE) and adjacent sigma-dependent pause element (SDPE) to yield a Q-loading complex, and Q subsequently translocates with RNAP as a pausing-deficient, termination-deficient Q-loaded complex. Here, we report high-resolution structures of 4 states on the pathway of antitermination by Q from bacteriophage 21 (Q21): Q21, the Q21-QBE complex, the Q21-loading complex, and the Q21-loaded complex. The results show that Q21 forms a torus, a "nozzle," that narrows and extends the RNAP RNA-exit channel, extruding topologically linked single-stranded RNA and preventing the formation of pause and terminator hairpins. | ||||||
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 638.5 KB | Display | ![]() |
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PDB format | ![]() | 497.3 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 20234MC ![]() 6p18C ![]() 6p1aC ![]() 6p1bC ![]() 6p1cC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-DNA (123-MER) fragment carrying phage-21 pR' promoter, pause element, and transcribed region, ... , 2 types, 2 molecules 12
#1: DNA chain | Mass: 38545.605 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() |
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#2: DNA chain | Mass: 37358.949 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() |
-DNA-directed RNA polymerase subunit ... , 4 types, 5 molecules ABCDE
#3: Protein | ![]() Mass: 36558.680 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() Strain: K12 / Gene: rpoA, pez, phs, sez, b3295, JW3257 / Plasmid: pIA900 / Production host: ![]() ![]() ![]() ![]() #4: Protein | | ![]() Mass: 150820.875 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() Strain: K12 Gene: rpoB, groN, nitB, rif, ron, stl, stv, tabD, b3987, JW3950 Production host: ![]() ![]() ![]() ![]() #5: Protein | | ![]() Mass: 158314.891 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() Strain: K12 / Gene: rpoC, tabB, b3988, JW3951 / Plasmid: pIA900 / Production host: ![]() ![]() ![]() ![]() #6: Protein | | ![]() Mass: 10249.547 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() Strain: K12 / Gene: rpoZ, b3649, JW3624 / Plasmid: pIA900 / Production host: ![]() ![]() ![]() ![]() |
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-Protein / RNA chain , 2 types, 2 molecules QR
#7: Protein | Mass: 18668.789 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
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#8: RNA chain | Mass: 22972.562 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() ![]() ![]() |
-Non-polymers , 2 types, 3 molecules ![](data/chem/img/ZN.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/MG.gif)
#9: Chemical | #10: Chemical | ChemComp-MG / | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: ![]() |
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Sample preparation
Component | Name: Q21 transcription antitermination complex: loaded complex Type: COMPLEX / Entity ID: #1-#8 / Source: RECOMBINANT | ||||||||||||||||||||||||
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Molecular weight | Experimental value: NO | ||||||||||||||||||||||||
Source (natural) | Organism: ![]() ![]() ![]() | ||||||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() ![]() | ||||||||||||||||||||||||
Buffer solution | pH: 7.8 | ||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 9 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied![]() ![]() | ||||||||||||||||||||||||
Specimen support | Grid material: GOLD / Grid mesh size: 400 divisions/in. / Grid type: UltrAuFoil | ||||||||||||||||||||||||
Vitrification![]() | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 293 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Talos Arctica / Image courtesy: FEI Company |
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Microscopy | Model: FEI TALOS ARCTICA |
Electron gun | Electron source![]() ![]() |
Electron lens | Mode: BRIGHT FIELD![]() |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 1.3 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 1528 |
Image scans | Movie frames/image: 25 / Used frames/image: 1-25 |
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Processing
EM software |
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CTF correction![]() | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 486699 | ||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry![]() | ||||||||||||||||||||||||||||||||||||||||
3D reconstruction![]() | Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 7778 / Algorithm: FOURIER SPACE / Num. of class averages: 3 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | B value: 50 / Protocol: RIGID BODY FIT / Space: REAL / Target criteria: 0.143 |