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- PDB-7zn7: Cryo-EM structure of RCMV-E E27 bound to human DDB1 (deltaBPB) an... -
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Open data
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Basic information
Entry | Database: PDB / ID: 7zn7 | ||||||
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Title | Cryo-EM structure of RCMV-E E27 bound to human DDB1 (deltaBPB) and rat STAT2 CCD | ||||||
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Function / homology | ![]() Interleukin-20 family signaling / Interferon alpha/beta signaling / Regulation of IFNA/IFNB signaling / ISGF3 complex / positive regulation by virus of viral protein levels in host cell / epigenetic programming in the zygotic pronuclei / spindle assembly involved in female meiosis / Cul4-RING E3 ubiquitin ligase complex / UV-damage excision repair / biological process involved in interaction with symbiont ...Interleukin-20 family signaling / Interferon alpha/beta signaling / Regulation of IFNA/IFNB signaling / ISGF3 complex / positive regulation by virus of viral protein levels in host cell / epigenetic programming in the zygotic pronuclei / spindle assembly involved in female meiosis / Cul4-RING E3 ubiquitin ligase complex / UV-damage excision repair / biological process involved in interaction with symbiont / WD40-repeat domain binding / regulation of mitotic cell cycle phase transition / Cul4A-RING E3 ubiquitin ligase complex / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / negative regulation of type I interferon-mediated signaling pathway / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | ||||||
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Method | ![]() ![]() ![]() | ||||||
![]() | Lauer, S. / Spahn, C.M.T. / Schwefel, D. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural mechanism of CRL4-instructed STAT2 degradation via a novel cytomegaloviral DCAF receptor. Authors: Vu Thuy Khanh Le-Trilling / Sofia Banchenko / Darius Paydar / Pia Madeleine Leipe / Lukas Binting / Simon Lauer / Andrea Graziadei / Robin Klingen / Christine Gotthold / Jörg Bürger / ...Authors: Vu Thuy Khanh Le-Trilling / Sofia Banchenko / Darius Paydar / Pia Madeleine Leipe / Lukas Binting / Simon Lauer / Andrea Graziadei / Robin Klingen / Christine Gotthold / Jörg Bürger / Thilo Bracht / Barbara Sitek / Robert Jan Lebbink / Anna Malyshkina / Thorsten Mielke / Juri Rappsilber / Christian Mt Spahn / Sebastian Voigt / Mirko Trilling / David Schwefel / ![]() ![]() ![]() ![]() Abstract: Human cytomegalovirus (CMV) is a ubiquitously distributed pathogen whose rodent counterparts such as mouse and rat CMV serve as common infection models. Here, we conducted global proteome profiling ...Human cytomegalovirus (CMV) is a ubiquitously distributed pathogen whose rodent counterparts such as mouse and rat CMV serve as common infection models. Here, we conducted global proteome profiling of rat CMV-infected cells and uncovered a pronounced loss of the transcription factor STAT2, which is crucial for antiviral interferon signalling. Via deletion mutagenesis, we found that the viral protein E27 is required for CMV-induced STAT2 depletion. Cellular and in vitro analyses showed that E27 exploits host-cell Cullin4-RING ubiquitin ligase (CRL4) complexes to induce poly-ubiquitylation and proteasomal degradation of STAT2. Cryo-electron microscopy revealed how E27 mimics molecular surface properties of cellular CRL4 substrate receptors called DCAFs (DDB1- and Cullin4-associated factors), thereby displacing them from the catalytic core of CRL4. Moreover, structural analyses showed that E27 recruits STAT2 through a bipartite binding interface, which partially overlaps with the IRF9 binding site. Structure-based mutations in M27, the murine CMV homologue of E27, impair the interferon-suppressing capacity and virus replication in mouse models, supporting the conserved importance of DCAF mimicry for CMV immune evasion. | ||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 263.6 KB | Display | ![]() |
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PDB format | ![]() | 197 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 14802MC ![]() 7znnC 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
#1: Protein | Mass: 93671.461 Da / Num. of mol.: 1 / Mutation: delta396-705 GNGNSG Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
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#2: Protein | Mass: 76341.898 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#3: Protein | Mass: 97172.953 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
#4: Chemical | ChemComp-ZN / |
Has ligand of interest | Y |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: ![]() |
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Sample preparation
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Buffer solution | pH: 7.8 | |||||||||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.13 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied![]() ![]() | |||||||||||||||||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R1.2/1.3 | |||||||||||||||||||||||||||||||||||
Vitrification![]() | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 99 % / Chamber temperature: 277.15 K / Details: 45 seconds adsorption 2 seconds blot |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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Microscopy | Model: FEI POLARA 300 |
Electron gun | Electron source![]() ![]() |
Electron lens | Mode: BRIGHT FIELD![]() ![]() |
Image recording | Average exposure time: 10 sec. / Electron dose: 62 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 4 / Num. of real images: 8069 |
Image scans | Movie frames/image: 50 / Used frames/image: 1-50 |
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Processing
Software | Name: PHENIX / Version: 1.19.2_4158: / Classification: refinement | ||||||||||||||||||||||||||||||||||||
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EM software |
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CTF correction![]() | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 974291 | ||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry![]() | ||||||||||||||||||||||||||||||||||||
3D reconstruction![]() | Resolution: 3.78 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 389784 / Algorithm: FOURIER SPACE / Details: non-uniform refinement / Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||
Atomic model building | B value: 112 / Protocol: FLEXIBLE FIT / Space: REAL Target criteria: Fast gradient-driven minimization of combined map and restraints target | ||||||||||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 6ZUE | ||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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