7MGS

SARS-CoV-2 main protease in complex with N-terminal autoprocessing substrate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.196 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Recognition of Divergent Viral Substrates by the SARS-CoV-2 Main Protease.

MacDonald, E.A.Frey, G.Namchuk, M.N.Harrison, S.C.Hinshaw, S.M.Windsor, I.W.

(2021) ACS Infect Dis 7: 2591-2595

  • DOI: https://doi.org/10.1021/acsinfecdis.1c00237
  • Primary Citation of Related Structures:  
    7MGR, 7MGS

  • PubMed Abstract: 

    The main protease (M pro ) of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the cause of coronavirus disease (COVID-19), is an ideal target for pharmaceutical inhibition. M pro is conserved among coronaviruses and distinct from human proteases. Viral replication depends on the cleavage of the viral polyprotein at multiple sites. We present crystal structures of SARS-CoV-2 M pro bound to two viral substrate peptides. The structures show how M pro recognizes distinct substrates and how subtle changes in substrate accommodation can drive large changes in catalytic efficiency. One peptide, constituting the junction between viral nonstructural proteins 8 and 9 (nsp8/9), has P1' and P2' residues that are unique among the SARS-CoV-2 M pro cleavage sites but conserved among homologous junctions in coronaviruses. M pro cleaves nsp8/9 inefficiently, and amino acid substitutions at P1' or P2' can enhance catalysis. Visualization of M pro with intact substrates provides new templates for antiviral drug design and suggests that the coronavirus lifecycle selects for finely tuned substrate-dependent catalytic parameters.


  • Organizational Affiliation

    Laboratory of Molecular Medicine, Boston Children's Hospital, Boston, Massachusetts 02115, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
3C-like proteinase306Severe acute respiratory syndrome coronavirus 2Mutation(s): 1 
Gene Names: rep1a-1b
EC: 3.4.22.69
UniProt
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTD1 
Go to UniProtKB:  P0DTD1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DTD1
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
SER-ALA-VAL-LEU-GLN-SER-GLY-PHE9Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
UniProt
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTD1 
Go to UniProtKB:  P0DTD1
Entity Groups  
UniProt GroupP0DTD1
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download Ideal Coordinates CCD File 
C [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.196 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.771α = 90
b = 63.312β = 90
c = 104.646γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2021-06-23
    Type: Initial release
  • Version 1.1: 2021-09-08
    Changes: Database references
  • Version 1.2: 2021-09-22
    Changes: Database references
  • Version 1.3: 2023-10-18
    Changes: Data collection, Refinement description