5NFY

SARS-CoV nsp10/nsp14 dynamic complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.382 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and molecular basis of mismatch correction and ribavirin excision from coronavirus RNA.

Ferron, F.Subissi, L.Silveira De Morais, A.T.Le, N.T.T.Sevajol, M.Gluais, L.Decroly, E.Vonrhein, C.Bricogne, G.Canard, B.Imbert, I.

(2018) Proc. Natl. Acad. Sci. U.S.A. 115: E162-E171

  • DOI: 10.1073/pnas.1718806115

  • PubMed Abstract: 
  • Coronaviruses (CoVs) stand out among RNA viruses because of their unusually large genomes (∼30 kb) associated with low mutation rates. CoVs code for nsp14, a bifunctional enzyme carrying RNA cap guanine N7-methyltransferase (MTase) and 3'-5' exoribon ...

    Coronaviruses (CoVs) stand out among RNA viruses because of their unusually large genomes (∼30 kb) associated with low mutation rates. CoVs code for nsp14, a bifunctional enzyme carrying RNA cap guanine N7-methyltransferase (MTase) and 3'-5' exoribonuclease (ExoN) activities. ExoN excises nucleotide mismatches at the RNA 3'-end in vitro, and its inactivation in vivo jeopardizes viral genetic stability. Here, we demonstrate for severe acute respiratory syndrome (SARS)-CoV an RNA synthesis and proofreading pathway through association of nsp14 with the low-fidelity nsp12 viral RNA polymerase. Through this pathway, the antiviral compound ribavirin 5'-monophosphate is significantly incorporated but also readily excised from RNA, which may explain its limited efficacy in vivo. The crystal structure at 3.38 Å resolution of SARS-CoV nsp14 in complex with its cofactor nsp10 adds to the uniqueness of CoVs among RNA viruses: The MTase domain presents a new fold that differs sharply from the canonical Rossmann fold.


    Organizational Affiliation

    Centre National de la Recherche Scientifique, Aix-Marseille Université, CNRS UMR 7257, Architecture et Fonction des Macromolécules Biologiques, 13009 Marseille, France; isabelle.imbert@univ-amu.fr.,Centre National de la Recherche Scientifique, Aix-Marseille Université, CNRS UMR 7257, Architecture et Fonction des Macromolécules Biologiques, 13009 Marseille, France.,Global Phasing Ltd., Cambridge CB3 0AX, England.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Polyprotein 1ab
A, B, C, D
534SARS coronavirus Frankfurt 1Mutation(s): 0 
Find proteins for Q1T6X8 (SARS coronavirus Frankfurt 1)
Go to UniProtKB:  Q1T6X8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Polyprotein 1ab
M, N, O, P
138Human SARS coronavirusMutation(s): 0 
Gene Names: rep
Find proteins for P0C6X7 (Human SARS coronavirus)
Go to UniProtKB:  P0C6X7
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C, D, M, N, O, P
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A, C
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.382 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.193 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 185.881α = 90.00
b = 189.786β = 90.00
c = 196.245γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
autoSHARPphasing
AutoPROCdata collection
Aimlessdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European UnionFrancegrant agreement 260644

Revision History 

  • Version 1.0: 2018-01-10
    Type: Initial release
  • Version 1.1: 2018-01-17
    Type: Database references
  • Version 1.2: 2019-02-20
    Type: Advisory, Data collection, Derived calculations