[English] 日本語
Yorodumi
- EMDB-15692: Expanded Coxsackievirus A9 after 0.01% faf-BSA treatment -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-15692
TitleExpanded Coxsackievirus A9 after 0.01% faf-BSA treatment
Map dataExpanded RNA containing CVA9 after 0.01% faf-BSA treatment
Sample
  • Virus: Coxsackievirus A9
    • Protein or peptide: Capsid protein VP1
    • Protein or peptide: Capsid protein VP2
    • Protein or peptide: Capsid protein VP3
Function / homology
Function and homology information


symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of RIG-I 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 ...symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of RIG-I 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 / structural molecule activity / virion attachment to host cell / 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
Biological speciesHuman coxsackievirus A9 (strain Griggs) / Coxsackievirus A9
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsDomanska A / Plavec Z / Ruokolainen V / Loflund B / Marjomaki VS / Butcher SJ
Funding support Finland, 4 items
OrganizationGrant numberCountry
Academy of Finland315950 Finland
Academy of Finland336471 Finland
Jane and Aatos Erkko Foundation Finland
Sigrid Juselius Foundation95-7202-38 Finland
CitationJournal: J Virol / Year: 2022
Title: Structural Studies Reveal that Endosomal Cations Promote Formation of Infectious Coxsackievirus A9 A-Particles, Facilitating RNA and VP4 Release.
Authors: Aušra Domanska / Zlatka Plavec / Visa Ruokolainen / Benita Löflund / Varpu Marjomäki / Sarah J Butcher /
Abstract: Coxsackievirus A9 (CVA9), an enterovirus, is a common cause of pediatric aseptic meningitis and neonatal sepsis. During cell entry, enterovirus capsids undergo conformational changes leading to ...Coxsackievirus A9 (CVA9), an enterovirus, is a common cause of pediatric aseptic meningitis and neonatal sepsis. During cell entry, enterovirus capsids undergo conformational changes leading to expansion, formation of large pores, externalization of VP1 N termini, and loss of the lipid factor from VP1. Factors such as receptor binding, heat, and acidic pH can trigger capsid expansion in some enteroviruses. Here, we show that fatty acid-free bovine serum albumin or neutral endosomal ionic conditions can independently prime CVA9 for expansion and genome release. Our results showed that CVA9 treatment with albumin or endosomal ions generated a heterogeneous population of virions, which could be physically separated by asymmetric flow field flow fractionation and computationally by cryo-electron microscopy (cryo-EM) and image processing. We report cryo-EM structures of CVA9 A-particles obtained by albumin or endosomal ion treatment and a control nonexpanded virion to 3.5, 3.3, and 2.9 Å resolution, respectively. Whereas albumin promoted stable expanded virions, the endosomal ionic concentrations induced unstable CVA9 virions which easily disintegrated, losing their genome. Loss of most of the VP4 molecules and exposure of negatively charged amino acid residues in the capsid's interior after expansion created a repulsive viral RNA-capsid interface, aiding genome release. Coxsackievirus A9 (CVA9) is a common cause of meningitis and neonatal sepsis. The triggers and mode of action of RNA release into the cell unusually do not require receptor interaction. Rather, a slow process in the endosome, independent of low pH, is required. Here, we show by biophysical separation, cryogenic electron microscopy, and image reconstruction that albumin and buffers mimicking the endosomal ion composition can separately and together expand and prime CVA9 for uncoating. Furthermore, we show in these expanded particles that VP4 is present at only ~10% of the occupancy found in the virion, VP1 is externalized, and the genome is repelled by the negatively charged, repulsive inner surface of the capsid that occurs due to the expansion. Thus, we can now link observations from cell biology of infection with the physical processes that occur in the capsid to promote genome uncoating.
History
DepositionAug 29, 2022-
Header (metadata) releaseOct 26, 2022-
Map releaseOct 26, 2022-
UpdateFeb 1, 2023-
Current statusFeb 1, 2023Processing site: PDBe / Status: Released

-
Structure visualization

Supplemental images

Downloads & links

-
Map

FileDownload / File: emd_15692.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationExpanded RNA containing CVA9 after 0.01% faf-BSA treatment
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.97 Å/pix.
x 400 pix.
= 388. Å
0.97 Å/pix.
x 400 pix.
= 388. Å
0.97 Å/pix.
x 400 pix.
= 388. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.97 Å
Density
Contour LevelBy AUTHOR: 0.0185
Minimum - Maximum-0.03760837 - 0.08049
Average (Standard dev.)0.0013763426 (±0.0059161847)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 388.0 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Half map: Half map 2 of expanded CVA9 after 0.01% faf-BSA treatment

Fileemd_15692_half_map_1.map
AnnotationHalf map 2 of expanded CVA9 after 0.01% faf-BSA treatment
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

-
Half map: Half map 1 of expanded CVA9 after 0.01% faf-BSA treatment

Fileemd_15692_half_map_2.map
AnnotationHalf map 1 of expanded CVA9 after 0.01% faf-BSA treatment
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

-
Sample components

-
Entire : Coxsackievirus A9

EntireName: Coxsackievirus A9
Components
  • Virus: Coxsackievirus A9
    • Protein or peptide: Capsid protein VP1
    • Protein or peptide: Capsid protein VP2
    • Protein or peptide: Capsid protein VP3

-
Supramolecule #1: Coxsackievirus A9

SupramoleculeName: Coxsackievirus A9 / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all / NCBI-ID: 12067 / Sci species name: Coxsackievirus A9 / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: No / Virus empty: No
Host (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 8 MDa
Virus shellShell ID: 1 / Name: icosahedral / Diameter: 300.0 Å / T number (triangulation number): 1

-
Macromolecule #1: Capsid protein VP1

MacromoleculeName: Capsid protein VP1 / type: protein_or_peptide / ID: 1 / Details: Viral protein VP1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Human coxsackievirus A9 (strain Griggs) / Strain: Griggs
Molecular weightTheoretical: 33.86902 KDa
SequenceString: GDVEEAIERA VVHVADTMRS GPSNSASVPA LTAVETGHTS QVTPSDTMQT RHVKNYHSRS ESTVENFLGR SACVYMEEYK TTDNDVNKK FVAWPINTKQ MVQMRRKLEM FTYLRFDMEV TFVITSRQDP GTTLAQDMPV LTHQIMYVPP GGPIPAKVDD Y AWQTSTNP ...String:
GDVEEAIERA VVHVADTMRS GPSNSASVPA LTAVETGHTS QVTPSDTMQT RHVKNYHSRS ESTVENFLGR SACVYMEEYK TTDNDVNKK FVAWPINTKQ MVQMRRKLEM FTYLRFDMEV TFVITSRQDP GTTLAQDMPV LTHQIMYVPP GGPIPAKVDD Y AWQTSTNP SIFWTEGNAP ARMSIPFISI GNAYSNFYDG WSNFDQRGSY GYNTLNNLGH IYVRHVSGSS PHPITSTIRV YF KPKHTRA WVPRPPRLCQ YKKAFSVDFT PTPITDTRKD INTVTTVAQS RRRGDMSTLN TH

-
Macromolecule #2: Capsid protein VP2

MacromoleculeName: Capsid protein VP2 / type: protein_or_peptide / ID: 2 / Details: Viral protein VP2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Human coxsackievirus A9 (strain Griggs) / Strain: Griggs
Molecular weightTheoretical: 28.885518 KDa
SequenceString: SPTVEECGYS DRVRSITLGN STITTQECAN VVVGYGRWPT YLRDDEATAE DQPTQPDVAT CRFYTLDSIK WEKGSVGWWW KFPEALSDM GLFGQNMQYH YLGRAGYTIH VQCNASKFHQ GCLLVVCVPE AEMGGAVVGQ AFSATAMANG DKAYEFTSAT Q SDQTKVQT ...String:
SPTVEECGYS DRVRSITLGN STITTQECAN VVVGYGRWPT YLRDDEATAE DQPTQPDVAT CRFYTLDSIK WEKGSVGWWW KFPEALSDM GLFGQNMQYH YLGRAGYTIH VQCNASKFHQ GCLLVVCVPE AEMGGAVVGQ AFSATAMANG DKAYEFTSAT Q SDQTKVQT AIHNAGMGVG VGNLTIYPHQ WINLRTNNSA TIVMPYINSV PMDNMFRHYN FTLMVIPFVK LDYADTASTY VP ITVTVAP MCAEYNGLRL AQAQ

-
Macromolecule #3: Capsid protein VP3

MacromoleculeName: Capsid protein VP3 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Human coxsackievirus A9 (strain Griggs) / Strain: Griggs
Molecular weightTheoretical: 26.335072 KDa
SequenceString: GLPTMNTPGS TQFLTSDDFQ SPCALPQFDV TPSMNIPGEV KNLMEIAEVD SVVPVNNVQD TTDQMEMFRI PVTINAPLQQ QVFGLRLQP GLDSVFKHTL LGEILNYYAH WSGSMKLTFV FCGSAMATGK FLIAYSPPGA NPPKTRKDAM LGTHIIWDIG L QSSCVLCV ...String:
GLPTMNTPGS TQFLTSDDFQ SPCALPQFDV TPSMNIPGEV KNLMEIAEVD SVVPVNNVQD TTDQMEMFRI PVTINAPLQQ QVFGLRLQP GLDSVFKHTL LGEILNYYAH WSGSMKLTFV FCGSAMATGK FLIAYSPPGA NPPKTRKDAM LGTHIIWDIG L QSSCVLCV PWISQTHYRL VQQDEYTSAG YVTCWYQTGM IVPPGTPNSS SIMCFASACN DFSVRMLRDT PFISQDNKLQ

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

Concentration0.1 mg/mL
BufferpH: 7.25
Details: DPBS containing 0.01% faf-BSA, pH 7.25, incubated at 37 C for 1 h
GridModel: Quantifoil R1.2/1.3 / Support film - Material: CARBON / Support film - topology: HOLEY
VitrificationCryogen name: ETHANE / Instrument: HOMEMADE PLUNGER
Detailsthis sample was monodisperse

-
Electron microscopy

MicroscopeFEI TALOS ARCTICA
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 150000
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Average electron dose: 30.0 e/Å2
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

-
Image processing

Particle selectionNumber selected: 15179
Startup modelType of model: OTHER
Details: Initial model generated from the data using Relion 2 3D initial model protocol
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 2) / Details: Relion 2
Final 3D classificationSoftware - Name: RELION (ver. 3)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3)
Final reconstructionApplied symmetry - Point group: I (icosahedral) / Resolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3) / Number images used: 5533

-
Atomic model buiding 1

Initial modelPDB ID:
RefinementSpace: REAL / Protocol: FLEXIBLE FIT
Output model

PDB-8aw6:
Expanded Coxsackievirus A9 after 0.01% faf-BSA treatment

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242):Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more