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Open data
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Basic information
Entry | Database: PDB / ID: 3j2p | |||||||||
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Title | CryoEM structure of Dengue virus envelope protein heterotetramer | |||||||||
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![]() | VIRAL PROTEIN / flavivirus / fusion protein / protein complex / membrane | |||||||||
Function / homology | ![]() symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / flavivirin / host cell mitochondrion / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT2 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / viral capsid / double-stranded RNA binding / nucleoside-triphosphate phosphatase / protein complex oligomerization / monoatomic ion channel activity ...symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / flavivirin / host cell mitochondrion / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT2 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / viral capsid / double-stranded RNA binding / nucleoside-triphosphate phosphatase / protein complex oligomerization / monoatomic ion channel activity / mRNA (guanine-N7)-methyltransferase / methyltransferase cap1 / clathrin-dependent endocytosis of virus by host cell / mRNA (nucleoside-2'-O-)-methyltransferase activity / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / RNA helicase activity / host cell perinuclear region of cytoplasm / host cell endoplasmic reticulum membrane / protein dimerization activity / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / RNA helicase / induction by virus of host autophagy / RNA-directed RNA polymerase / viral RNA genome replication / serine-type endopeptidase activity / RNA-dependent RNA polymerase activity / virus-mediated perturbation of host defense response / fusion of virus membrane with host endosome membrane / viral envelope / host cell nucleus / virion attachment to host cell / structural molecule activity / virion membrane / ATP hydrolysis activity / proteolysis / extracellular region / ATP binding / membrane / metal ion binding Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.6 Å | |||||||||
![]() | Zhang, X. / Ge, P. / Yu, X. / Brannan, J.M. / Bi, G. / Zhang, Q. / Schein, S. / Zhou, Z.H. | |||||||||
![]() | ![]() Title: Cryo-EM structure of the mature dengue virus at 3.5-Å resolution. Authors: Xiaokang Zhang / Peng Ge / Xuekui Yu / Jennifer M Brannan / Guoqiang Bi / Qinfen Zhang / Stan Schein / Z Hong Zhou / ![]() Abstract: Regulated by pH, membrane-anchored proteins E and M function during dengue virus maturation and membrane fusion. Our atomic model of the whole virion from cryo-electron microscopy at 3.5-Å ...Regulated by pH, membrane-anchored proteins E and M function during dengue virus maturation and membrane fusion. Our atomic model of the whole virion from cryo-electron microscopy at 3.5-Å resolution reveals that in the mature virus at neutral extracellular pH, the N-terminal 20-amino-acid segment of M (involving three pH-sensing histidines) latches and thereby prevents spring-loaded E fusion protein from prematurely exposing its fusion peptide. This M latch is fastened at an earlier stage, during maturation at acidic pH in the trans-Golgi network. At a later stage, to initiate infection in response to acidic pH in the late endosome, M releases the latch and exposes the fusion peptide. Thus, M serves as a multistep chaperone of E to control the conformational changes accompanying maturation and infection. These pH-sensitive interactions could serve as targets for drug discovery. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 228.5 KB | Display | ![]() |
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PDB format | ![]() | 188.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 5499MC ![]() 5520C ![]() 3j27C 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
#1: Protein | Mass: 54363.734 Da / Num. of mol.: 2 / Fragment: UNP residues 281-775 / Source method: isolated from a natural source / Source: (natural) ![]() #2: Protein | Mass: 8259.646 Da / Num. of mol.: 2 / Fragment: UNP residues 206-280 / Source method: isolated from a natural source / Source: (natural) ![]() #3: Polysaccharide | Source method: isolated from a genetically manipulated source #4: Sugar | Sequence details | THE AUTHORS STATE THAT R15A (UNP R220A) IN SMALL ENVELOPE PROTEIN M IS CORRECT FOR THE NEW GUINEA STRAIN. | |
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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: Dengue Virus 2 / Type: VIRUS Details: E:M:M:E heterotetramer. icosahedral virion with envelope |
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Molecular weight | Value: 0.125 MDa / Experimental value: NO |
Details of virus | Empty: NO / Enveloped: YES / Host category: VERTEBRATES / Isolate: STRAIN / Type: VIRION |
Natural host | Organism: Homo sapiens |
Buffer solution | Name: TNE 50 mM Tris, 140 mM NaCl, 5 mM EDTA / pH: 7.4 / Details: TNE 50 mM Tris, 140 mM NaCl, 5 mM EDTA |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: 50 mM Tris, 140 mM NaCl, 5 mM EDTA |
Specimen support | Details: Quantifoil R2/1 |
Vitrification | Instrument: HOMEMADE PLUNGER / Cryogen name: ETHANE Details: 2.5 uL sample added per grid, plunged into liquid ethane Method: 2.5 uL sample added per grid |
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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 / Date: Dec 23, 2010 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 59000 X / Calibrated magnification: 57518 X / Nominal defocus max: 2400 nm / Nominal defocus min: 500 nm / Cs: 2.7 mm / Astigmatism: software compensation / Camera length: 0 mm |
Specimen holder | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Tilt angle max: 0 ° / Tilt angle min: 0 ° |
Image recording | Electron dose: 25 e/Å2 / Film or detector model: KODAK SO-163 FILM / Details: Scanned by Nikon 9000ED |
Image scans | Num. digital images: 1103 |
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Processing
EM software | Name: EMAN / Category: 3D reconstruction | ||||||||||||
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CTF correction | Details: EMAN, per particle, with astigmatism compensation | ||||||||||||
Symmetry | Point symmetry: I (icosahedral) | ||||||||||||
3D reconstruction | Method: MPSA / Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 9288 / Nominal pixel size: 1.076 Å / Actual pixel size: 1.104 Å Magnification calibration: previously calibrated with TMV pitch Details: EMAN with Multi-path Simulated Annealing / Symmetry type: POINT | ||||||||||||
Refinement step | Cycle: LAST
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