8AIQ

Mpro of SARS COV-2 in complex with the MG-87 inhibitor

• PDB DOI: https://doi.org/10.2210/pdb8AIQ/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Severe acute respiratory syndrome coronavirus
• Expression System: Escherichia coli B
• Mutation(s): No 


• Deposited: 2022-07-27 Released: 2023-08-16 
• Deposition Author(s): El Kilani, H., Hilgenfeld, R.
• Funding Organization(s): European Commission

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.19 Å
• R-Value Free: 0.223 
• R-Value Work: 0.168 

Literature

Main Protease SARS-COV-2 in complex with the inhibitor MG-87

EL Kilani, H., Hilgenfeld, R.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 68.7 kDa 
• Atom Count: 4,990 
• Modelled Residue Count: 612 
• Deposited Residue Count: 612 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Replicase polyprotein 1ab	A [auth AAA], B [auth BBB]	306	Severe acute respiratory syndrome coronavirus	Mutation(s): 0  Gene Names: rep, 1a-1b
UniProt
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2) Explore P0DTD1  Go to UniProtKB:  P0DTD1

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MXU (Subject of Investigation/LOI)	C [auth AAA], E [auth BBB]	~{tert}-butyl ~{N}-[1-[(2~{S})-1-[[(2~{S},3~{R})-4-azanyl-3-oxidanyl-4-oxidanylidene-1-[(3~{S})-2-oxidanylidenepyrrolidin-3-yl]butan-2-yl]amino]-3-cyclopropyl-1-oxidanylidene-propan-2-yl]-2-oxidanylidene-pyridin-3-yl]carbamate C24 H35 N5 O7 WNCHATFCLSCVLN-LEUOFYLZSA-N
CL	D [auth AAA]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.19 Å
• R-Value Free: 0.223 
• R-Value Work: 0.168 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 45.941	α = 90
b = 63.773	β = 91.251
c = 103.513	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
Aimless	data scaling
REFMAC	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-08-16 
Deposition Author(s): El Kilani, H., Hilgenfeld, R.

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Funding Organization	Location	Grant Number
European Commission	European Union	--

Revision History  

• Version 1.0: 2023-08-16
  Type: Initial release
  
• Version 1.1: 2024-10-09
  Changes: Structure summary