Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 69.47 kDa 
• Atom Count: 5354 
• Residue Count: 611 
• Unique protein chains: 2

6XBG

Crystal structure of the SARS-CoV-2 (COVID-19) main protease in complex with inhibitor UAW246

• DOI: 10.2210/pdb6XBG/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Severe acute respiratory syndrome coronavirus 2, synthetic construct
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2020-06-05 Released: 2020-06-17 
• Deposition Author(s): Sacco, M., Ma, C., Wang, J., Chen, Y.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.206 
• R-Value Work: 0.181 
• R-Value Observed: 0.183 

Literature

Crystal structure of the SARS-CoV-2 (COVID-19) main protease in complex with inhibitor UAW246

Ma, C., Sacco, M., Chen, Y., Wang, J.

To be published.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
main protease	A, B	308	Severe acute respiratory syndrome coronavirus 2	Mutation(s): 0  Gene Names: rep, 1a-1b EC: 3.4.22.69 (PDB Primary Data), 3.4.19.12 (UniProt), 3.4.22 (UniProt), 2.7.7.48 (UniProt), 3.6.4.12 (UniProt), 3.6.4.13 (UniProt), 3.1.13 (UniProt), 3.1 (UniProt), 2.1.1 (UniProt)
Find proteins for P0DTD1 (Severe acute respiratory syndrome coronavirus 2) Go to UniProtKB:  P0DTD1

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
inhibitor UAW246	C, E	4	synthetic construct	Mutation(s): 0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	B	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
NA	B	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Biologically Interesting Molecules 1 Unique
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_002392	C, E	UAW246	Peptide-like /  Inhibitor		--

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.206 
• R-Value Work: 0.181 
• R-Value Observed: 0.183 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.367	α = 90
b = 98.854	β = 108.23
c = 59.215	γ = 90

Software Package:

Software Name	Purpose
HKL-3000	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-3000	data reduction
MOLREP	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2020-06-05 
• Released Date: 2020-06-17 
Deposition Author(s): Sacco, M., Ma, C., Wang, J., Chen, Y.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	AI147325

Revision History 

• Version 1.0: 2020-06-17
  Type: Initial release