+Open data
-Basic information
Entry | Database: PDB / ID: 6tu5 | ||||||
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Title | Influenza A/H7N9 polymerase core (apo) | ||||||
Components |
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Keywords | VIRAL PROTEIN / RNA-dependent RNA polymerase | ||||||
Function / homology | Function and homology information symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity / cap snatching / 7-methylguanosine mRNA capping / viral transcription / host cell mitochondrion / virion component / endonuclease activity / host cell cytoplasm / Hydrolases; Acting on ester bonds / RNA-directed RNA polymerase ...symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity / cap snatching / 7-methylguanosine mRNA capping / viral transcription / host cell mitochondrion / virion component / endonuclease activity / host cell cytoplasm / Hydrolases; Acting on ester bonds / RNA-directed RNA polymerase / viral RNA genome replication / RNA-dependent RNA polymerase activity / nucleotide binding / DNA-templated transcription / host cell nucleus / RNA binding / metal ion binding / cytoplasm Similarity search - Function | ||||||
Biological species | Influenza A virus | ||||||
Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.325 Å | ||||||
Authors | Cusack, S. / Pflug, A. | ||||||
Funding support | France, 1items
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Citation | Journal: Cell / Year: 2020 Title: A Structure-Based Model for the Complete Transcription Cycle of Influenza Polymerase. Authors: Joanna M Wandzik / Tomas Kouba / Manikandan Karuppasamy / Alexander Pflug / Petra Drncova / Jan Provaznik / Nayara Azevedo / Stephen Cusack / Abstract: Influenza polymerase uses unique mechanisms to synthesize capped and polyadenylated mRNAs from the genomic viral RNA (vRNA) template, which is packaged inside ribonucleoprotein particles (vRNPs). ...Influenza polymerase uses unique mechanisms to synthesize capped and polyadenylated mRNAs from the genomic viral RNA (vRNA) template, which is packaged inside ribonucleoprotein particles (vRNPs). Here, we visualize by cryoelectron microscopy the conformational dynamics of the polymerase during the complete transcription cycle from pre-initiation to termination, focusing on the template trajectory. After exiting the active site cavity, the template 3' extremity rebinds into a specific site on the polymerase surface. Here, it remains sequestered during all subsequent transcription steps, forcing the template to loop out as it further translocates. At termination, the strained connection between the bound template 5' end and the active site results in polyadenylation by stuttering at uridine 17. Upon product dissociation, further conformational changes release the trapped template, allowing recycling back into the pre-initiation state. Influenza polymerase thus performs transcription while tightly binding to and protecting both template ends, allowing efficient production of multiple mRNAs from a single vRNP. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 6tu5.cif.gz | 554.2 KB | Display | PDBx/mmCIF format |
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PDB format | pdb6tu5.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 6tu5.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/tu/6tu5 ftp://data.pdbj.org/pub/pdb/validation_reports/tu/6tu5 | HTTPS FTP |
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-Related structure data
Related structure data | 6szuC 6szvC 6t0nC 6t0rC 6t0sC 6t0uC 6t0vC 6t0wC 6t2cC 6tw1C 4wsbS S: Starting model for refinement C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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Unit cell |
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Noncrystallographic symmetry (NCS) | NCS domain:
NCS ensembles :
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-Components
#1: Protein | Mass: 59383.859 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Details: N-terminal truncation deletes endonuclease Source: (gene. exp.) Influenza A virus (A/Zhejiang/DTID-ZJU01/2013(H7N9)) Strain: A/Zhejiang/DTID-ZJU01/2013(H7N9) / Gene: PA / Variant: H7N9 / Production host: Trichoplusia ni (cabbage looper) References: UniProt: M9TI86, Hydrolases; Acting on ester bonds #2: Protein | Mass: 86496.156 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Influenza A virus (A/Zhejiang/DTID-ZJU01/2013(H7N9)) Strain: A/Zhejiang/DTID-ZJU01/2013(H7N9) / Gene: PB1 / Variant: H7N9 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: M9TLW3, RNA-directed RNA polymerase #3: Protein | Mass: 16203.751 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Details: C-terminal sequence GSGSENLYFQ is linker and residual TEV cleavage site after cleavage Source: (gene. exp.) Influenza A virus (A/Zhejiang/DTID-ZJU01/2013(H7N9)) Strain: A/Zhejiang/DTID-ZJU01/2013(H7N9) / Gene: PB2 / Variant: H7N9 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: X5F427 #4: Chemical | Has ligand of interest | N | |
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-Experimental details
-Experiment
Experiment | Method: X-RAY DIFFRACTION / Number of used crystals: 1 |
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-Sample preparation
Crystal | Density Matthews: 2.8 Å3/Da / Density % sol: 56.01 % |
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Crystal grow | Temperature: 281 K / Method: vapor diffusion, sitting drop / pH: 7 Details: Protein at about 9 mg/ml 0.1 M Tris pH 7.0, 8-13% PEG 8K, 0.2 M MgCl2, 0.1 M guanidine hydrochloride |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: SYNCHROTRON / Site: ESRF / Beamline: MASSIF-3 / Wavelength: 0.9677 Å |
Detector | Type: DECTRIS EIGER X 4M / Detector: PIXEL / Date: Jun 30, 2016 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.9677 Å / Relative weight: 1 |
Reflection | Resolution: 3.325→132.024 Å / Num. obs: 50439 / % possible obs: 92.7 % / Redundancy: 11.6 % / CC1/2: 0.997 / Rmerge(I) obs: 0.19 / Rpim(I) all: 0.057 / Rrim(I) all: 0.199 / Net I/σ(I): 10.7 |
Reflection shell | Resolution: 3.325→3.463 Å / Redundancy: 13.3 % / Rmerge(I) obs: 2.298 / Mean I/σ(I) obs: 1.5 / Num. unique obs: 2523 / CC1/2: 0.5 / Rrim(I) all: 2.388 / % possible all: 42.2 |
-Processing
Software |
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Refinement | Method to determine structure: MOLECULAR REPLACEMENT Starting model: 4WSB Resolution: 3.325→132.024 Å / Cor.coef. Fo:Fc: 0.937 / Cor.coef. Fo:Fc free: 0.903 / SU B: 32.599 / SU ML: 0.499 / Cross valid method: FREE R-VALUE / ESU R Free: 0.617 Details: Hydrogens have been added in their riding positions
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 119.623 Å2
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Refinement step | Cycle: LAST / Resolution: 3.325→132.024 Å
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Refine LS restraints |
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LS refinement shell |
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