[English] 日本語
Yorodumi
- PDB-8jce: Cryo-EM Structure of Chikungunya Virus Nonstructural Protein 1 wi... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 8jce
TitleCryo-EM Structure of Chikungunya Virus Nonstructural Protein 1 with m7GpppAmU
ComponentsmRNA-capping enzyme nsP1
KeywordsVIRAL PROTEIN / nonstructural protein / Chikungunya virus / RNA cap / replication
Function / homology
Function and homology information


host cell filopodium / ADP-ribose 1''-phosphate phosphatase / mRNA methyltransferase activity / mRNA 5'-triphosphate monophosphatase activity / mRNA 5'-phosphatase / polynucleotide 5'-phosphatase activity / polynucleotide adenylyltransferase / poly(A) RNA polymerase activity / regulation of cytoskeleton organization / symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity ...host cell filopodium / ADP-ribose 1''-phosphate phosphatase / mRNA methyltransferase activity / mRNA 5'-triphosphate monophosphatase activity / mRNA 5'-phosphatase / polynucleotide 5'-phosphatase activity / polynucleotide adenylyltransferase / poly(A) RNA polymerase activity / regulation of cytoskeleton organization / symbiont-mediated suppression of host mRNA transcription via inhibition of RNA polymerase II activity / 7-methylguanosine mRNA capping / cysteine-type peptidase activity / symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT1 activity / Transferases; Transferring one-carbon groups; Methyltransferases / host cell cytoplasmic vesicle membrane / Transferases; Transferring phosphorus-containing groups; Nucleotidyltransferases / nucleoside-triphosphate phosphatase / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / RNA helicase activity / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / RNA helicase / RNA-directed RNA polymerase / viral RNA genome replication / RNA-dependent RNA polymerase activity / virus-mediated perturbation of host defense response / DNA-templated transcription / host cell nucleus / GTP binding / host cell plasma membrane / ATP hydrolysis activity / proteolysis / RNA binding / ATP binding / membrane / metal ion binding
Similarity search - Function
: / : / : / Non-structural protein 3, zinc-binding domain / Tomato mosaic virus helicase, N-terminal domain / Alphavirus nsP2 protease domain superfamily / Alphavirus nsp2 protease (nsp2pro) domain / Peptidase family C9 / Alphavirus nsp2 protease (nsp2pro) domain profile. / Viral methyltransferase ...: / : / : / Non-structural protein 3, zinc-binding domain / Tomato mosaic virus helicase, N-terminal domain / Alphavirus nsP2 protease domain superfamily / Alphavirus nsp2 protease (nsp2pro) domain / Peptidase family C9 / Alphavirus nsp2 protease (nsp2pro) domain profile. / Viral methyltransferase / Alphavirus-like methyltransferase (MT) domain / Alphavirus-like methyltransferase (MT) domain profile. / Tymovirus, RNA-dependent RNA polymerase / RNA dependent RNA polymerase / Viral (Superfamily 1) RNA helicase / (+) RNA virus helicase core domain / (+)RNA virus helicase core domain profile. / Non-structural protein 3, X-domain-like / Macro domain / Appr-1"-p processing enzyme / Macro domain / Macro domain profile. / Macro domain-like / RNA-directed RNA polymerase, catalytic domain / RdRp of positive ssRNA viruses catalytic domain profile. / S-adenosyl-L-methionine-dependent methyltransferase superfamily / DNA/RNA polymerase superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
S-ADENOSYL-L-HOMOCYSTEINE / Chem-YG4 / Polyprotein P1234
Similarity search - Component
Biological speciesChikungunya virus strain S27-African prototype
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.41 Å
AuthorsZhang, K. / Law, M.C.Y. / Nguyen, T.M. / Tan, Y.B. / Wirawan, M. / Law, Y.S. / Luo, D.H.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: J Biol Chem / Year: 2023
Title: Chikungunya virus nonstructural protein 1 is a versatile RNA capping and decapping enzyme.
Authors: Michelle Cheok Yien Law / Kuo Zhang / Yaw Bia Tan / Trinh Mai Nguyen / Dahai Luo /
Abstract: Chikungunya virus (CHIKV) nonstructural protein 1 (nsP1) contains both the N7-guanine methyltransferase and guanylyltransferase activities and catalyzes the 5' end cap formation of viral RNAs. To ...Chikungunya virus (CHIKV) nonstructural protein 1 (nsP1) contains both the N7-guanine methyltransferase and guanylyltransferase activities and catalyzes the 5' end cap formation of viral RNAs. To further understand its catalytic activity and role in virus-host interaction, we demonstrate that purified recombinant CHIKV nsP1 can reverse the guanylyl transfer reaction and remove the mGMP from a variety of capped RNA substrates including host mRNAs. We then provide the structural basis of this function with a high-resolution cryo-EM structure of nsP1 in complex with the unconventional cap-1 substrate RNA mGpppAU. We show that the 5'ppRNA species generated by decapping can trigger retinoic acid-inducible gene I-mediated interferon response. We further demonstrate that the decapping activity is conserved among the alphaviral nsP1s. To our knowledge, this is a new mechanism through which alphaviruses activate the antiviral immune response. This decapping activity could promote cellular mRNA degradation and facilitate viral gene expression, which is functionally analogous to the cap-snatching mechanism by influenza virus.
History
DepositionMay 11, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Nov 15, 2023Provider: repository / Type: Initial release
Revision 1.1Dec 6, 2023Group: Database references / Category: citation / Item: _citation.journal_volume / _citation.title

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: mRNA-capping enzyme nsP1
B: mRNA-capping enzyme nsP1
C: mRNA-capping enzyme nsP1
D: mRNA-capping enzyme nsP1
E: mRNA-capping enzyme nsP1
F: mRNA-capping enzyme nsP1
G: mRNA-capping enzyme nsP1
H: mRNA-capping enzyme nsP1
I: mRNA-capping enzyme nsP1
J: mRNA-capping enzyme nsP1
K: mRNA-capping enzyme nsP1
L: mRNA-capping enzyme nsP1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)762,89160
Polymers743,87412
Non-polymers19,01748
Water10,593588
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

-
Components

-
Protein , 1 types, 12 molecules ABCDEFGHIJKL

#1: Protein
mRNA-capping enzyme nsP1 / Non-structural protein 1


Mass: 61989.477 Da / Num. of mol.: 12 / Mutation: H37A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Chikungunya virus strain S27-African prototype
Production host: Homo sapiens (human)
References: UniProt: Q8JUX6, Transferases; Transferring one-carbon groups; Methyltransferases, Transferases; Transferring phosphorus-containing groups; Nucleotidyltransferases

-
Non-polymers , 5 types, 636 molecules

#2: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: Zn
#3: Chemical
ChemComp-SAH / S-ADENOSYL-L-HOMOCYSTEINE


Type: L-peptide linking / Mass: 384.411 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: C14H20N6O5S
#4: Chemical
ChemComp-YG4 / [(2~{R},3~{R},4~{R},5~{R})-5-(6-azanyl-7,8-dihydropurin-9-yl)-2-[[[[[(2~{R},3~{S},4~{R},5~{R})-5-(2-azanyl-7-methyl-6-oxidanylidene-1,8-dihydropurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]oxy-oxidanyl-phosphoryl]oxy-oxidanyl-phosphoryl]oxymethyl]-4-methoxy-oxolan-3-yl] [(2~{R},3~{S},4~{R},5~{S})-5-[2,4-bis(oxidanylidene)pyrimidin-1-yl]-3,4-bis(oxidanyl)oxolan-2-yl]methyl hydrogen phosphate


Mass: 1110.657 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: C31H46N12O25P4 / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: Mg
#6: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 588 / Source method: isolated from a natural source / Formula: H2O

-
Details

Has ligand of interestY

-
Experimental details

-
Experiment

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

-
Sample preparation

ComponentName: Nonstructural Protein 1 / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Chikungunya virus strain S27-African prototype
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

-
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 FIELD / Nominal defocus max: 3500 nm / Nominal defocus min: 600 nm
Image recordingElectron dose: 70 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

-
Processing

CTF correctionType: NONE
3D reconstructionResolution: 2.41 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 70128 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00344712
ELECTRON MICROSCOPYf_angle_d0.51760816
ELECTRON MICROSCOPYf_dihedral_angle_d5.2616828
ELECTRON MICROSCOPYf_chiral_restr0.0426852
ELECTRON MICROSCOPYf_plane_restr0.0047716

+
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://pdbjlvh1.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