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- PDB-7vxh: Coxsackievirus B3 full particle at pH7.4 (VP3-234Q) -

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Basic information

Entry
Database: PDB / ID: 7vxh
TitleCoxsackievirus B3 full particle at pH7.4 (VP3-234Q)
Components
  • Capsid protein VP1
  • Capsid protein VP2
  • Capsid protein VP3
  • Capsid protein VP4
KeywordsVIRUS / CVB3 / VP3-234Q / full particle
Function / homology
Function and homology information


: / symbiont-mediated perturbation of host gene expression / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of RIG-I activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid ...: / symbiont-mediated perturbation of host gene expression / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of RIG-I activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MDA-5 activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of MAVS activity / picornain 2A / symbiont-mediated suppression of host mRNA export from nucleus / symbiont genome entry into host cell via pore formation in plasma membrane / picornain 3C / T=pseudo3 icosahedral viral capsid / host cell cytoplasmic vesicle membrane / endocytosis involved in viral entry into host cell / : / nucleoside-triphosphate phosphatase / protein complex oligomerization / monoatomic ion channel activity / RNA helicase activity / DNA replication / induction by virus of host autophagy / RNA-directed RNA polymerase / symbiont-mediated suppression of host gene expression / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity / DNA-templated transcription / host cell nucleus / virion attachment to host cell / structural molecule activity / ATP hydrolysis activity / proteolysis / RNA binding / ATP binding / membrane / metal ion binding
Similarity search - Function
Picornavirus coat protein VP4 superfamily / Poliovirus 3A protein-like / Poliovirus 3A protein like / Picornavirus 2B protein / Poliovirus core protein 3a, soluble domain / Picornavirus 2B protein / Peptidase C3, picornavirus core protein 2A / Picornavirus core protein 2A / Picornavirus coat protein VP4 / Picornavirus coat protein (VP4) ...Picornavirus coat protein VP4 superfamily / Poliovirus 3A protein-like / Poliovirus 3A protein like / Picornavirus 2B protein / Poliovirus core protein 3a, soluble domain / Picornavirus 2B protein / Peptidase C3, picornavirus core protein 2A / Picornavirus core protein 2A / Picornavirus coat protein VP4 / Picornavirus coat protein (VP4) / Picornavirales 3C/3C-like protease domain / Picornavirales 3C/3C-like protease domain profile. / Peptidase C3A/C3B, picornaviral / 3C cysteine protease (picornain 3C) / Picornavirus capsid / picornavirus capsid protein / Helicase, superfamily 3, single-stranded RNA virus / Superfamily 3 helicase of positive ssRNA viruses domain profile. / Helicase, superfamily 3, single-stranded DNA/RNA virus / RNA helicase / Picornavirus/Calicivirus coat protein / Viral coat protein subunit / RNA-directed RNA polymerase, C-terminal domain / Viral RNA-dependent RNA polymerase / Reverse transcriptase/Diguanylate cyclase domain / RNA-directed RNA polymerase, catalytic domain / RdRp of positive ssRNA viruses catalytic domain profile. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan / DNA/RNA polymerase superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
PALMITIC ACID / Genome polyprotein
Similarity search - Component
Biological speciesCoxsackievirus B3
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.95 Å
AuthorsWang, Q.L. / Liu, C.C.
Funding support China, 1items
OrganizationGrant numberCountry
National Science Foundation (NSF, China)82072289 China
CitationJournal: Proc Natl Acad Sci U S A / Year: 2022
Title: Molecular basis of differential receptor usage for naturally occurring CD55-binding and -nonbinding coxsackievirus B3 strains.
Authors: Qingling Wang / Qian Yang / Congcong Liu / Guoqing Wang / Hao Song / Guijun Shang / Ruchao Peng / Xiao Qu / Sheng Liu / Yingzi Cui / Peiyi Wang / Wenbo Xu / Xin Zhao / Jianxun Qi / Mengsu Yang / George F Gao /
Abstract: Receptor usage defines cell tropism and contributes to cell entry and infection. Coxsackievirus B (CVB) engages coxsackievirus and adenovirus receptor (CAR), and selectively utilizes the decay- ...Receptor usage defines cell tropism and contributes to cell entry and infection. Coxsackievirus B (CVB) engages coxsackievirus and adenovirus receptor (CAR), and selectively utilizes the decay-accelerating factor (DAF; CD55) to infect cells. However, the differential receptor usage mechanism for CVB remains elusive. This study identified VP3-234 residues (234Q/N/V/D/E) as critical population selection determinants during CVB3 virus evolution, contributing to diverse binding affinities to CD55. Cryoelectron microscopy (cryo-EM) structures of CD55-binding/nonbinding isolates and their complexes with CD55 or CAR were obtained under both neutral and acidic conditions, and the molecular mechanism of VP3-234 residues determining CD55 affinity/specificity for naturally occurring CVB3 strains was elucidated. Structural and biochemical studies in vitro revealed the dynamic entry process of CVB3 and the function of the uncoating receptor CAR with different pH preferences. This work provides detailed insight into the molecular mechanism of CVB infection and contributes to an in-depth understanding of enterovirus attachment receptor usage.
History
DepositionNov 12, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jan 19, 2022Provider: repository / Type: Initial release
Revision 1.1Aug 3, 2022Group: Database references / Derived calculations
Category: citation / citation_author / pdbx_struct_oper_list
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _pdbx_struct_oper_list.name / _pdbx_struct_oper_list.symmetry_operation / _pdbx_struct_oper_list.type

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Structure visualization

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  • Biological unit as complete icosahedral assembly
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  • Biological unit as icosahedral pentamer
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  • Biological unit as icosahedral 23 hexamer
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  • Deposited structure unit
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  • Simplified surface model + fitted atomic model
  • EMDB-32179
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  • Superimposition on EM map
  • EMDB-32179
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Structure viewerMolecule:
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Assembly

Deposited unit
A: Capsid protein VP1
B: Capsid protein VP2
C: Capsid protein VP3
D: Capsid protein VP4
hetero molecules


Theoretical massNumber of molelcules
Total (without water)94,4265
Polymers94,1704
Non-polymers2561
Water0
1
A: Capsid protein VP1
B: Capsid protein VP2
C: Capsid protein VP3
D: Capsid protein VP4
hetero molecules
x 60


Theoretical massNumber of molelcules
Total (without water)5,665,574300
Polymers5,650,188240
Non-polymers15,38560
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation59
2


  • Idetical with deposited unit
  • icosahedral asymmetric unit
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
3
A: Capsid protein VP1
B: Capsid protein VP2
C: Capsid protein VP3
D: Capsid protein VP4
hetero molecules
x 5


  • icosahedral pentamer
  • 472 kDa, 20 polymers
Theoretical massNumber of molelcules
Total (without water)472,13125
Polymers470,84920
Non-polymers1,2825
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation4
4
A: Capsid protein VP1
B: Capsid protein VP2
C: Capsid protein VP3
D: Capsid protein VP4
hetero molecules
x 6


  • icosahedral 23 hexamer
  • 567 kDa, 24 polymers
Theoretical massNumber of molelcules
Total (without water)566,55730
Polymers565,01924
Non-polymers1,5396
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
point symmetry operation5
5


  • Idetical with deposited unit in distinct coordinate
  • icosahedral asymmetric unit, std point frame
TypeNameSymmetry operationNumber
transform to point frame1
SymmetryPoint symmetry: (Schoenflies symbol: I (icosahedral))

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Components

#1: Protein Capsid protein VP1 / / P1D / Virion protein 1


Mass: 31639.371 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Coxsackievirus B3 / Production host: Homo sapiens (human) / References: UniProt: P03313
#2: Protein Capsid protein VP2 / / P1B / Virion protein 2


Mass: 28822.475 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Coxsackievirus B3 / Production host: Homo sapiens (human) / References: UniProt: P03313
#3: Protein Capsid protein VP3 / / P1C / Virion protein 3


Mass: 26227.725 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Coxsackievirus B3 / Production host: Homo sapiens (human) / References: UniProt: P03313
#4: Protein Capsid protein VP4 / / P1A / Virion protein 4


Mass: 7480.235 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Coxsackievirus B3 / Production host: Homo sapiens (human) / References: UniProt: P03313
#5: Chemical ChemComp-PLM / PALMITIC ACID / Palmitic acid


Mass: 256.424 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C16H32O2 / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY

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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: Coxsackievirus B3 / Type: VIRUS / Entity ID: #1-#4 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Coxsackievirus B3
Source (recombinant)Organism: Homo sapiens (human)
Details of virusEmpty: NO / Enveloped: NO / Isolate: STRAIN / Type: VIRION
Natural hostOrganism: Homo sapiens
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: 15mA / Grid type: PELCO Ultrathin Carbon with Lacey Carbon
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 75000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm / Calibrated defocus min: 1800 nm / Calibrated defocus max: 5000 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature (max): 70 K / Temperature (min): 70 K
Image recordingAverage exposure time: 1 sec. / Electron dose: 40 e/Å2 / Detector mode: COUNTING / Film or detector model: FEI FALCON III (4k x 4k)
Image scansWidth: 4096 / Height: 4096

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Processing

EM software
IDNameVersionCategoryDetails
1EMAN1particle selectionethan.py was used to automatically pick particles
2EPUimage acquisitionEPU was used to collect the raw data
4CTFFIND4CTF correctionCTFFIND4 was used to estimate the CTF values
7UCSF Chimera1.14model fitting
9RELION3.0.8initial Euler assignmentRELION 3.0.8 was used to determine the initial angular assignment
10RELION3.0.8final Euler assignmentRELION 3.0.8 was used to determine the final angular assignment
11RELION3.0.8classificationRELION 3.0.8 was used to do Class3D
12RELION3.0.83D reconstruction
13PHENIX1.18model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 158446
3D reconstructionResolution: 2.95 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 35289 / Algorithm: FOURIER SPACE / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model building
IDPDB-IDPdb chain-ID 3D fitting-ID
11COV

1cov

A1
21COV

1cov

B1
31COV

1cov

C1
41COV

1cov

D1

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