[English] 日本語
Yorodumi
- PDB-8xid: DGNNV protrusion domain structure at neutral pH -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 8xid
TitleDGNNV protrusion domain structure at neutral pH
ComponentsCapsid protein alpha
KeywordsVIRAL PROTEIN / protrusion domain / monomer
Function / homologyNodavirus capsid / nodavirus capsid protein / Viral coat protein subunit / viral capsid / Capsid protein alpha
Function and homology information
Biological speciesDragon grouper nervous necrosis virus
MethodSOLUTION NMR / simulated annealing
AuthorsSterbova, P. / Tzou, D.L. / Chang, W.H.
Funding support Taiwan, 1items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, Taiwan) Taiwan
CitationJournal: ACS Infect Dis / Year: 2024
Title: Molecular Mechanism of pH-Induced Protrusion Configuration Switching in Piscine Betanodavirus Implies a Novel Antiviral Strategy.
Authors: Petra Štěrbová / Chun-Hsiung Wang / Kathleen J D Carillo / Yuan-Chao Lou / Takayuki Kato / Keiichi Namba / Der-Lii M Tzou / Wei-Hau Chang /
Abstract: Many viruses contain surface spikes or protrusions that are essential for virus entry. These surface structures can thereby be targeted by antiviral drugs to treat viral infections. Nervous necrosis ...Many viruses contain surface spikes or protrusions that are essential for virus entry. These surface structures can thereby be targeted by antiviral drugs to treat viral infections. Nervous necrosis virus (NNV), a simple nonenveloped virus in the genus of betanodavirus, infects fish and damages aquaculture worldwide. NNV has 60 conspicuous surface protrusions, each comprising three protrusion domains (P-domain) of its capsid protein. NNV uses protrusions to bind to common receptors of sialic acids on the host cell surface to initiate its entry via the endocytic pathway. However, structural alterations of NNV in response to acidic conditions encountered during this pathway remain unknown, while detailed interactions of protrusions with receptors are unclear. Here, we used cryo-EM to discover that Grouper NNV protrusions undergo low-pH-induced compaction and resting. NMR and molecular dynamics (MD) simulations were employed to probe the atomic details. A solution structure of the P-domain at pH 7.0 revealed a long flexible loop (amino acids 311-330) and a pocket outlined by this loop. Molecular docking analysis showed that the N-terminal moiety of sialic acid inserted into this pocket to interact with conserved residues inside. MD simulations demonstrated that part of this loop converted to a β-strand under acidic conditions, allowing for P-domain trimerization and compaction. Additionally, a low-pH-favored conformation is attained for the linker connecting the P-domain to the NNV shell, conferring resting protrusions. Our findings uncover novel pH-dependent conformational switching mechanisms underlying NNV protrusion dynamics potentially utilized for facilitating NNV entry, providing new structural insights into complex NNV-host interactions with the identification of putative druggable hotspots on the protrusion.
History
DepositionDec 19, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 30, 2024Provider: repository / Type: Initial release

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Capsid protein alpha


Theoretical massNumber of molelcules
Total (without water)13,8191
Polymers13,8191
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: NMR Distance Restraints, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
NMR ensembles
DataCriteria
Number of conformers (submitted / calculated)20 / 100structures with the lowest energy
RepresentativeModel #1medoid

-
Components

#1: Protein Capsid protein alpha


Mass: 13819.236 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Dragon grouper nervous necrosis virus / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q9E6H7
Has protein modificationN

-
Experimental details

-
Experiment

ExperimentMethod: SOLUTION NMR
NMR experiment
Conditions-IDExperiment-IDSolution-IDSample stateSpectrometer-IDType
111isotropic12D 1H-15N HSQC
121isotropic12D 1H-13C HSQC
131isotropic13D CBCA(CO)NH
141isotropic13D HNCO
151isotropic13D HN(CA)CB
171isotropic13D HBHA(CO)NH
161isotropic23D (H)CCH-TOCSY
191isotropic23D 1H-15N NOESY
1101isotropic13D HN(CO)CA

-
Sample preparation

DetailsType: solution
Contents: 1.0 mM [U-13C; U-15N] protrusion domain, 95% H2O/5% D2O
Label: 13C, 15N / Solvent system: 95% H2O/5% D2O
SampleConc.: 1.0 mM / Component: protrusion domain / Isotopic labeling: [U-13C; U-15N]
Sample conditionsIonic strength: 0.12 M / Label: neutral pH / pH: 7 / Pressure: 1 atm / Temperature: 298 K

-
NMR measurement

NMR spectrometer
TypeManufacturerModelField strength (MHz)Spectrometer-ID
Bruker AVANCEBrukerAVANCE6001
Bruker AVANCEBrukerAVANCE8002

-
Processing

NMR software
NameDeveloperClassification
CARAKeller and Wuthrichchemical shift assignment
X-PLOR NIHSchwieters, Kuszewski, Tjandra and Clorestructure calculation
X-PLOR NIHSchwieters, Kuszewski, Tjandra and Clorerefinement
CARAKeller and Wuthrichpeak picking
TopSpinBruker Biospincollection
RefinementMethod: simulated annealing / Software ordinal: 3
NMR representativeSelection criteria: medoid
NMR ensembleConformer selection criteria: structures with the lowest energy
Conformers calculated total number: 100 / Conformers submitted total number: 20

+
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