[English] 日本語
Yorodumi
- PDB-7pko: CryoEM structure of Rotavirus NSP2 -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 7pko
TitleCryoEM structure of Rotavirus NSP2
ComponentsNon-structural protein 2
KeywordsVIRAL PROTEIN / RNA chaperone Rotavirus RNA folding
Function / homology
Function and homology information


nucleoside diphosphate kinase activity / ribonucleoside triphosphate phosphatase activity / viral genome replication / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / host cell cytoplasm / RNA binding / ATP binding / metal ion binding
Similarity search - Function
: / : / Rotavirus non-structural protein 35, N-terminal / Rotavirus NSP2, N-terminal / Rotavirus NSP2, C-terminal / Rotavirus non-structural protein 35, C-terminal / Rotavirus non-structural protein 2
Similarity search - Domain/homology
Non-structural protein 2
Similarity search - Component
Biological speciesRotavirus A
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsBravo, J.P.K. / Borodavka, A.
Funding support United Kingdom, 2items
OrganizationGrant numberCountry
Wellcome Trust213437/Z/18/Z United Kingdom
Biotechnology and Biological Sciences Research Council (BBSRC)BB/M011151/1 United Kingdom
CitationJournal: Proc Natl Acad Sci U S A / Year: 2021
Title: Structural basis of rotavirus RNA chaperone displacement and RNA annealing.
Authors: Jack P K Bravo / Kira Bartnik / Luca Venditti / Julia Acker / Emma H Gail / Alice Colyer / Chen Davidovich / Don C Lamb / Roman Tuma / Antonio N Calabrese / Alexander Borodavka /
Abstract: Rotavirus genomes are distributed between 11 distinct RNA molecules, all of which must be selectively copackaged during virus assembly. This likely occurs through sequence-specific RNA interactions ...Rotavirus genomes are distributed between 11 distinct RNA molecules, all of which must be selectively copackaged during virus assembly. This likely occurs through sequence-specific RNA interactions facilitated by the RNA chaperone NSP2. Here, we report that NSP2 autoregulates its chaperone activity through its C-terminal region (CTR) that promotes RNA-RNA interactions by limiting its helix-unwinding activity. Unexpectedly, structural proteomics data revealed that the CTR does not directly interact with RNA, while accelerating RNA release from NSP2. Cryo-electron microscopy reconstructions of an NSP2-RNA complex reveal a highly conserved acidic patch on the CTR, which is poised toward the bound RNA. Virus replication was abrogated by charge-disrupting mutations within the acidic patch but completely restored by charge-preserving mutations. Mechanistic similarities between NSP2 and the unrelated bacterial RNA chaperone Hfq suggest that accelerating RNA dissociation while promoting intermolecular RNA interactions may be a widespread strategy of RNA chaperone recycling.
History
DepositionAug 26, 2021Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 29, 2021Provider: repository / Type: Initial release
Revision 1.1Oct 20, 2021Group: Data collection / Database references
Category: citation / citation_author ...citation / citation_author / database_PDB_rev / database_PDB_rev_record / em_admin / pdbx_database_proc
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_PubMed / _citation.title / _citation.year / _em_admin.last_update

-
Structure visualization

Movie
  • Deposited structure unit
  • Imaged by Jmol
  • Download
  • Simplified surface model + fitted atomic model
  • EMDB-13474
  • Imaged by Jmol
  • Download
  • Superimposition on EM map
  • EMDB-13474
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Non-structural protein 2
B: Non-structural protein 2
C: Non-structural protein 2
D: Non-structural protein 2
E: Non-structural protein 2
F: Non-structural protein 2
G: Non-structural protein 2
U: Non-structural protein 2


Theoretical massNumber of molelcules
Total (without water)289,8798
Polymers289,8798
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area22910 Å2
ΔGint-89 kcal/mol
Surface area118880 Å2
MethodPISA

-
Components

#1: Protein
Non-structural protein 2 / NSP2 / NCVP3 / Non-structural RNA-binding protein 35 / NS35


Mass: 36234.820 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rotavirus A / Gene: NSP2 / Production host: Escherichia coli (E. coli)
References: UniProt: A2T3N6, Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement

-
Experimental details

-
Experiment

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

-
Sample preparation

ComponentName: Rotavirus NSP2 RNP complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Rotavirus
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

-
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
Image recordingElectron dose: 110 e/Å2 / Film or detector model: FEI FALCON III (4k x 4k)

-
Processing

SoftwareName: PHENIX / Version: 1.16_3549: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 109391 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00420800
ELECTRON MICROSCOPYf_angle_d0.5528088
ELECTRON MICROSCOPYf_dihedral_angle_d5.38912648
ELECTRON MICROSCOPYf_chiral_restr0.043136
ELECTRON MICROSCOPYf_plane_restr0.0033560

+
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