8CB3

SARS-CoV Macro domain complexed with 3-(N-morpholino)propanesulfonic acid

• PDB DOI: https://doi.org/10.2210/pdb8CB3/pdb

• Classification: HYDROLASE
• Organism(s): Severe acute respiratory syndrome coronavirus
• Expression System: Escherichia coli 'BL21-Gold(DE3)pLysS AG
• Mutation(s): No 


• Deposited: 2023-01-25 Released: 2024-02-07 
• Deposition Author(s): Morin, B., Ferron, F., Coutard, B., Canard, B., Marseilles Structural Genomics Program @ AFMB (MSGP)
• Funding Organization(s): H2020 Marie Curie Actions of the European Commission

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.57 Å
• R-Value Free: 
  0.203 (Depositor), 0.200 (DCC) 
• R-Value Work: 
  0.179 (Depositor), 0.180 (DCC) 
• R-Value Observed: 
  0.180 (Depositor) 

Starting Model: experimental

Literature

Derivatives of MOPS: Promising scaffolds for SARS Coronaviruses macro domain-targeted inhibition

Ortega-Granda, O., Morin, B., Alvarez, K., Feracci, M., Coutard, B., Canard, B., Ferron, F., Rabah, N.

(2025) FEBS J 

• DOI: https://doi.org/10.1111/febs.70039

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors.

Macromolecule Content

• Total Structure Weight: 56.21 kDa 
• Atom Count: 4,464 
• Modelled Residue Count: 517 
• Deposited Residue Count: 522 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Papain-like protease nsp3	A, B, C	174	Severe acute respiratory syndrome coronavirus	Mutation(s): 0  Gene Names: rep, 1a-1b EC: 3.4.19.12 (PDB Primary Data), 3.4.22 (PDB Primary Data)
UniProt
Find proteins for P0C6X7 (Severe acute respiratory syndrome coronavirus) Explore P0C6X7  Go to UniProtKB:  P0C6X7

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MPO (Subject of Investigation/LOI)	D [auth B]	3[N-MORPHOLINO]PROPANE SULFONIC ACID C7 H15 N O4 S DVLFYONBTKHTER-UHFFFAOYSA-N
GOL	E [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.57 Å
• R-Value Free:  0.203 (Depositor), 0.200 (DCC) 
• R-Value Work:  0.179 (Depositor), 0.180 (DCC) 
• R-Value Observed: 0.180 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 37.285	α = 90
b = 55.405	β = 91.7
c = 108.671	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
autoPROC	data reduction
Aimless	data scaling
MOLREP	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-02-07 
Deposition Author(s): Morin, B., Ferron, F., Coutard, B., Canard, B., Marseilles Structural Genomics Program @ AFMB (MSGP)

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Funding Organization	Location	Grant Number
H2020 Marie Curie Actions of the European Commission	European Union	VIZIER Grant agreement ID: 511960

Revision History  

• Version 1.0: 2024-02-07
  Type: Initial release
  
• Version 1.1: 2025-02-26
  Changes: Database references, Structure summary