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- PDB-3j2p: CryoEM structure of Dengue virus envelope protein heterotetramer -

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Basic information

Entry
Database: PDB / ID: 3j2p
TitleCryoEM structure of Dengue virus envelope protein heterotetramer
Components
  • Envelope protein E
  • Small envelope protein M
KeywordsVIRAL PROTEIN / flavivirus / fusion protein / protein complex / membrane
Function / homology
Function and homology information


symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / host cell mitochondrion / flavivirin / 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 / nucleoside-triphosphate phosphatase / double-stranded RNA binding / protein complex oligomerization ...symbiont-mediated suppression of host JAK-STAT cascade via inhibition of host TYK2 activity / host cell mitochondrion / flavivirin / 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 / nucleoside-triphosphate phosphatase / double-stranded RNA binding / 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 endoplasmic reticulum membrane / host cell perinuclear region of cytoplasm / protein dimerization activity / RNA helicase / induction by virus of host autophagy / RNA-directed RNA polymerase / viral RNA genome replication / RNA-dependent RNA polymerase activity / serine-type endopeptidase activity / fusion of virus membrane with host endosome membrane / viral envelope / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / host cell nucleus / structural molecule activity / virion attachment to host cell / virion membrane / ATP hydrolysis activity / proteolysis / extracellular region / ATP binding / membrane / metal ion binding
Similarity search - Function
Flavivirus envelope glycoprotein M-like / Monooxygenase - #260 / Viral Envelope Glycoprotein; domain 3 / Viral Envelope Glycoprotein, domain 3 / Viral Envelope Glycoprotein, domain 2 / Tick-borne Encephalitis virus Glycoprotein, domain 1 / Viral Envelope Glycoprotein; domain 2 / Tick-borne Encephalitis virus Glycoprotein; domain 1 / Immunoglobulin-like - #350 / Monooxygenase ...Flavivirus envelope glycoprotein M-like / Monooxygenase - #260 / Viral Envelope Glycoprotein; domain 3 / Viral Envelope Glycoprotein, domain 3 / Viral Envelope Glycoprotein, domain 2 / Tick-borne Encephalitis virus Glycoprotein, domain 1 / Viral Envelope Glycoprotein; domain 2 / Tick-borne Encephalitis virus Glycoprotein; domain 1 / Immunoglobulin-like - #350 / Monooxygenase / : / : / Flavivirus envelope glycoprotein E, stem/anchor domain / RNA-directed RNA polymerase, thumb domain, Flavivirus / Flavivirus RNA-directed RNA polymerase, thumb domain / Flavivirus capsid protein C superfamily / Flavivirus non-structural protein NS2B / Flavivirus NS3 helicase, C-terminal helical domain / Genome polyprotein, Flavivirus / Flavivirus non-structural protein NS4A / Flavivirus non-structural protein NS2B / Flavivirus capsid protein C / Flavivirus non-structural protein NS4B / mRNA cap 0/1 methyltransferase / Flavivirus capsid protein C / Flavivirus non-structural protein NS4B / Flavivirus non-structural protein NS4A / Flavivirus NS2B domain profile. / mRNA cap 0 and cap 1 methyltransferase (EC 2.1.1.56 and EC 2.1.1.57) domain profile. / Flavivirus non-structural protein NS2A / Flavivirus non-structural protein NS2A / Flavivirus NS3, petidase S7 / Peptidase S7, Flavivirus NS3 serine protease / Flavivirus NS3 protease (NS3pro) domain profile. / Envelope glycoprotein M, flavivirus / Flavivirus envelope glycoprotein M / RNA-directed RNA polymerase, flavivirus / Flavivirus RNA-directed RNA polymerase, fingers and palm domains / Flavivirus non-structural Protein NS1 / Flavivirus non-structural protein NS1 / Envelope glycoprotein M superfamily, flavivirus / Flavivirus polyprotein propeptide / Flavivirus polyprotein propeptide superfamily / Flavivirus polyprotein propeptide / Flaviviral glycoprotein E, central domain, subdomain 1 / Flaviviral glycoprotein E, central domain, subdomain 2 / Flavivirus envelope glycoprotein E, Stem/Anchor domain / Flavivirus glycoprotein E, immunoglobulin-like domain / Flavivirus envelope glycoprotein E, Stem/Anchor domain superfamily / Flavivirus glycoprotein, immunoglobulin-like domain / Flavivirus glycoprotein central and dimerisation domain / Flavivirus glycoprotein, central and dimerisation domains / Ribosomal RNA methyltransferase, FtsJ domain / FtsJ-like methyltransferase / Flavivirus/Alphavirus glycoprotein, immunoglobulin-like domain superfamily / Flavivirus glycoprotein, central and dimerisation domain superfamily / Flaviviral glycoprotein E, dimerisation domain / Helicase, Ruva Protein; domain 3 / DEAD box, Flavivirus / Flavivirus DEAD domain / helicase superfamily c-terminal domain / Immunoglobulin E-set / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / RNA-directed RNA polymerase, catalytic domain / RdRp of positive ssRNA viruses catalytic domain profile. / S-adenosyl-L-methionine-dependent methyltransferase superfamily / Peptidase S1, PA clan, chymotrypsin-like fold / DNA/RNA polymerase superfamily / Peptidase S1, PA clan / Up-down Bundle / Immunoglobulin-like / Sandwich / P-loop containing nucleoside triphosphate hydrolase / 2-Layer Sandwich / Orthogonal Bundle / Mainly Beta / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
Biological speciesDengue virus 2
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.6 Å
AuthorsZhang, X. / Ge, P. / Yu, X. / Brannan, J.M. / Bi, G. / Zhang, Q. / Schein, S. / Zhou, Z.H.
CitationJournal: Nat Struct Mol Biol / Year: 2013
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
DepositionNov 30, 2012Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 19, 2012Provider: repository / Type: Initial release
Revision 1.1Dec 26, 2012Group: Database references
Revision 1.2Jan 16, 2013Group: Database references
Revision 1.3Oct 12, 2016Group: Structure summary
Revision 1.4Jul 18, 2018Group: Data collection / Category: em_software / Item: _em_software.image_processing_id
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_entity_id / _chem_comp.name / _chem_comp.type / _pdbx_entity_nonpoly.entity_id / _pdbx_entity_nonpoly.name / _pdbx_struct_assembly_gen.asym_id_list / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation

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Assembly

Deposited unit
A: Envelope protein E
B: Small envelope protein M
C: Envelope protein E
D: Small envelope protein M
hetero molecules


Theoretical massNumber of molelcules
Total (without water)126,5388
Polymers125,2474
Non-polymers1,2914
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Envelope protein E /


Mass: 54363.734 Da / Num. of mol.: 2 / Fragment: UNP residues 281-775 / Source method: isolated from a natural source / Source: (natural) Dengue virus 2 / Cell line: Mosquito Cells C6/36 / Strain: New Guinea / References: UniProt: P14340
#2: Protein Small envelope protein M / Matrix protein


Mass: 8259.646 Da / Num. of mol.: 2 / Fragment: UNP residues 206-280 / Source method: isolated from a natural source / Source: (natural) Dengue virus 2 / Cell line: Mosquito Cells C6/36 / Strain: New Guinea / References: UniProt: P14340
#3: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#4: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
Sequence detailsTHE AUTHORS STATE THAT R15A (UNP R220A) IN SMALL ENVELOPE PROTEIN M IS CORRECT FOR THE NEW GUINEA STRAIN.

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Dengue Virus 2 / Type: VIRUS
Details: E:M:M:E heterotetramer. icosahedral virion with envelope
Molecular weightValue: 0.125 MDa / Experimental value: NO
Details of virusEmpty: NO / Enveloped: YES / Host category: VERTEBRATES / Isolate: STRAIN / Type: VIRION
Natural hostOrganism: Homo sapiens
Buffer solutionName: TNE 50 mM Tris, 140 mM NaCl, 5 mM EDTA / pH: 7.4 / Details: TNE 50 mM Tris, 140 mM NaCl, 5 mM EDTA
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: 50 mM Tris, 140 mM NaCl, 5 mM EDTA
Specimen supportDetails: Quantifoil R2/1
VitrificationInstrument: 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
MicroscopyModel: FEI TITAN KRIOS / Date: Dec 23, 2010
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / 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 holderSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Tilt angle max: 0 ° / Tilt angle min: 0 °
Image recordingElectron dose: 25 e/Å2 / Film or detector model: KODAK SO-163 FILM / Details: Scanned by Nikon 9000ED
Image scansNum. digital images: 1103

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Processing

EM softwareName: EMAN / Category: 3D reconstruction
CTF correctionDetails: EMAN, per particle, with astigmatism compensation
SymmetryPoint symmetry: I (icosahedral)
3D reconstructionMethod: 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 stepCycle: LAST
ProteinNucleic acidLigandSolventTotal
Num. atoms8720 0 84 0 8804

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