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- EMDB-11815: Native-like genome-containing particle of DWV in acidic pH -

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Basic information

Entry
Database: EMDB / ID: EMD-11815
TitleNative-like genome-containing particle of DWV in acidic pH
Map data
Sample
  • Virus: Deformed wing virus
    • Protein or peptide: Genome polyprotein
    • Protein or peptide: Genome polyprotein
    • Protein or peptide: Genome polyprotein
Function / homology
Function and homology information


host cell membrane / viral capsid / host cell cytoplasm / RNA helicase activity / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity / DNA-templated transcription / structural molecule activity / proteolysis ...host cell membrane / viral capsid / host cell cytoplasm / RNA helicase activity / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity / DNA-templated transcription / structural molecule activity / proteolysis / RNA binding / ATP binding / membrane / cytoplasm
Similarity search - Function
Dicistrovirus, capsid-polyprotein, C-terminal / CRPV capsid protein like / Picornavirales 3C/3C-like protease domain / Picornavirales 3C/3C-like protease domain profile. / 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 ...Dicistrovirus, capsid-polyprotein, C-terminal / CRPV capsid protein like / Picornavirales 3C/3C-like protease domain / Picornavirales 3C/3C-like protease domain profile. / 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. / 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
Genome polyprotein / Genome polyprotein / Genome polyprotein
Similarity search - Component
Biological speciesDeformed wing virus
Methodsingle particle reconstruction / cryo EM / Resolution: 4.8 Å
AuthorsSkubnik K / Plevka P
Funding support Czech Republic, 1 items
OrganizationGrant numberCountry
Grant Agency of the Czech RepublicGX19-25982X Czech Republic
CitationJournal: Sci Adv / Year: 2021
Title: Capsid opening enables genome release of iflaviruses.
Authors: Karel Škubník / Lukáš Sukeník / David Buchta / Tibor Füzik / Michaela Procházková / Jana Moravcová / Lenka Šmerdová / Antonín Přidal / Robert Vácha / Pavel Plevka /
Abstract: The family Iflaviridae includes economically important viruses of the western honeybee such as deformed wing virus, slow bee paralysis virus, and sacbrood virus. Iflaviruses have nonenveloped virions ...The family Iflaviridae includes economically important viruses of the western honeybee such as deformed wing virus, slow bee paralysis virus, and sacbrood virus. Iflaviruses have nonenveloped virions and capsids organized with icosahedral symmetry. The genome release of iflaviruses can be induced in vitro by exposure to acidic pH, implying that they enter cells by endocytosis. Genome release intermediates of iflaviruses have not been structurally characterized. Here, we show that conformational changes and expansion of iflavirus RNA genomes, which are induced by acidic pH, trigger the opening of iflavirus particles. Capsids of slow bee paralysis virus and sacbrood virus crack into pieces. In contrast, capsids of deformed wing virus are more flexible and open like flowers to release their genomes. The large openings in iflavirus particles enable the fast exit of genomes from capsids, which decreases the probability of genome degradation by the RNases present in endosomes.
History
DepositionOct 4, 2020-
Header (metadata) releaseFeb 10, 2021-
Map releaseFeb 10, 2021-
UpdateFeb 10, 2021-
Current statusFeb 10, 2021Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.016
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.016
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7al3
  • Surface level: 0.016
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7al3
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_11815.png

Downloads & links

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Map

FileDownload / File: emd_11815.map.gz / Format: CCP4 / Size: 620.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.063 Å
Density
Contour LevelBy AUTHOR: 0.016 / Movie #1: 0.016
Minimum - Maximum-0.012171887 - 0.03444469
Average (Standard dev.)0.0010523836 (±0.0044077523)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-273-273-273
Dimensions546546546
Spacing546546546
CellA=B=C: 580.39813 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0631.0631.063
M x/y/z546546546
origin x/y/z0.0000.0000.000
length x/y/z580.398580.398580.398
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS-273-273-273
NC/NR/NS546546546
D min/max/mean-0.0120.0340.001

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Supplemental data

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Half map: #1

Fileemd_11815_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_11815_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Deformed wing virus

EntireName: Deformed wing virus
Components
  • Virus: Deformed wing virus
    • Protein or peptide: Genome polyprotein
    • Protein or peptide: Genome polyprotein
    • Protein or peptide: Genome polyprotein

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Supramolecule #1: Deformed wing virus

SupramoleculeName: Deformed wing virus / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all / NCBI-ID: 198112 / Sci species name: Deformed wing virus / Virus type: VIRION / Virus isolate: OTHER / Virus enveloped: No / Virus empty: No
Host (natural)Organism: Apis mellifera (honey bee)
Host systemOrganism: Apis mellifera (honey bee)

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Macromolecule #1: Genome polyprotein

MacromoleculeName: Genome polyprotein / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Deformed wing virus
Molecular weightTheoretical: 28.679273 KDa
Recombinant expressionOrganism: Apis mellifera (honey bee)
SequenceString: GEESRNTTVL DTTTTLQSSG FGRAFFGEAF NDLKTLMRRY QLYGQLLLSV TTDKDIDHCM FTFPCLPQGL ALDIGSAGSP HEIFNRCRD GIIPLIASGY RFYRGDLRYK IVFPSNVNSN IWVQHRPDRR LEGWSAAKIV NCDAVSTGQG VYNHGYASHI Q ITRVNNVI ...String:
GEESRNTTVL DTTTTLQSSG FGRAFFGEAF NDLKTLMRRY QLYGQLLLSV TTDKDIDHCM FTFPCLPQGL ALDIGSAGSP HEIFNRCRD GIIPLIASGY RFYRGDLRYK IVFPSNVNSN IWVQHRPDRR LEGWSAAKIV NCDAVSTGQG VYNHGYASHI Q ITRVNNVI ELEVPFYNAT CYNYLQAFNA SSAASSYAVS LGEISVGFQA TSDDIASIVN KPVTIYYSIG DGMQFSQWVG YQ PMMILDQ LPAPVVRAVP E

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Macromolecule #2: Genome polyprotein

MacromoleculeName: Genome polyprotein / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Deformed wing virus
Molecular weightTheoretical: 28.3609 KDa
Recombinant expressionOrganism: Apis mellifera (honey bee)
SequenceString: MDNPNPGPDG EGEVELEKDS NVVLTTQRDP STSIPAPVSV KWSRWTSNDV VDDYATITSR WYQIAEFVWS KDDPFDKELA RLILPRALL SSIEANSDAI CDVPNTIPFK VHAYWRGDME VRVQINSNKF QVGQLQATWY YSDHENLNIS SKRSVYGFSQ M DHALISAS ...String:
MDNPNPGPDG EGEVELEKDS NVVLTTQRDP STSIPAPVSV KWSRWTSNDV VDDYATITSR WYQIAEFVWS KDDPFDKELA RLILPRALL SSIEANSDAI CDVPNTIPFK VHAYWRGDME VRVQINSNKF QVGQLQATWY YSDHENLNIS SKRSVYGFSQ M DHALISAS ASNEAKLVIP FKHVYPFLPT RIVPDWTTGI LDMGALNIRV IAPLRMSATG PTTCNVVVFI KLNNSEFTGT SS GKFYASQ IRAKPE

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Macromolecule #3: Genome polyprotein

MacromoleculeName: Genome polyprotein / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Deformed wing virus
Molecular weightTheoretical: 46.697582 KDa
Recombinant expressionOrganism: Apis mellifera (honey bee)
SequenceString: DNPSYQQSPR HFVPTGMHSL ALGTNLVEPL HALRLDAAGT TQHPVGCAPD EDMTVSSIAS RYGLIRRVQW KKDHAKGSLL LQLDADPFV EQRIEGTNPI SLYWFAPVGV VSSMFMQWRG SLEYRFDIIA SQFHTGRLIV GYVPGLTASL QLQMDYMKLK S SSYVVFDL ...String:
DNPSYQQSPR HFVPTGMHSL ALGTNLVEPL HALRLDAAGT TQHPVGCAPD EDMTVSSIAS RYGLIRRVQW KKDHAKGSLL LQLDADPFV EQRIEGTNPI SLYWFAPVGV VSSMFMQWRG SLEYRFDIIA SQFHTGRLIV GYVPGLTASL QLQMDYMKLK S SSYVVFDL QESNSFTFEV PYVSYRPWWV RKYGGNYLPS STDAPSTLFM YVQVPLIPME AVSDTIDINV YVRGGSSFEV CV PVQPSLG LNWNTDFILR NDEEYRAKTG YAPYYAGVWH SFNNSNSLVF RWGSASDQIA QWPTISVPRG ELAFLRIKDG KQA AVGTQP WRTMVVWPSG HGYNIGIPTY NAERARQLAQ HLYGGGSLTD EKAKQLFVPA NQQGPGKVSN GNPVWEVMRA PLAT QRAHI QDFEFIEAIP E

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 5.5
VitrificationCryogen name: ETHANE-PROPANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Average electron dose: 50.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: EMDB MAP
EMDB ID:

3574

Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.8 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 933
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

5mv6

RefinementSpace: REAL / Protocol: RIGID BODY FIT
Output model

PDB-7al3:
Native-like genome-containing particle of DWV in acidic pH

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