6YB7

SARS-CoV-2 main protease with unliganded active site (2019-nCoV, coronavirus disease 2019, COVID-19).

• PDB DOI: https://doi.org/10.2210/pdb6YB7/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Severe acute respiratory syndrome coronavirus 2
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2020-03-16 Released: 2020-03-25 
• Deposition Author(s): Owen, C.D., Lukacik, P., Strain-Damerell, C.M., Douangamath, A., Powell, A.J., Fearon, D., Brandao-Neto, J., Crawshaw, A.D., Aragao, D., Williams, M., Flaig, R., Hall, D.R., McAuley, K.E., Mazzorana, M., Stuart, D.I., von Delft, F., Walsh, M.A.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free: 0.180 
• R-Value Work: 0.142 
• R-Value Observed: 0.144 

Starting Model: experimental

Literature

COVID-19 main protease with unliganded active site

Owen, C.D., Lukacik, P., Strain-Damerell, C.M., Douangamath, A., Powell, A.J., Fearon, D., Brandao-Neto, J., Crawshaw, A.D., Aragao, D., Williams, M., Flaig, R., Hall, D., McAauley, K., Stuart, D.I., von Delft, F., Walsh, M.A.

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 and generated by PISA (software)

Biological Assembly Evidence: homology

Macromolecule Content

• Total Structure Weight: 34.35 kDa 
• Atom Count: 2,962 
• Modelled Residue Count: 305 
• Deposited Residue Count: 305 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
3C-like proteinase	A	305	Severe acute respiratory syndrome coronavirus 2	Mutation(s): 0  Gene Names: rep, 1a-1b EC: 3.4.22.69
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
PEG	H [auth A]	DI(HYDROXYETHYL)ETHER C4 H10 O3 MTHSVFCYNBDYFN-UHFFFAOYSA-N
DMS	B [auth A], C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], I [auth A]	DIMETHYL SULFOXIDE C2 H6 O S IAZDPXIOMUYVGZ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free: 0.180 
• R-Value Work: 0.142 
• R-Value Observed: 0.144 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 112.429	α = 90
b = 52.798	β = 103.03
c = 44.611	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
Aimless	data scaling
MOLREP	phasing
PDB_EXTRACT	data extraction
DIALS	data reduction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2020-03-25 
Deposition Author(s): Owen, C.D., Lukacik, P., Strain-Damerell, C.M., Douangamath, A., Powell, A.J., Fearon, D., Brandao-Neto, J., Crawshaw, A.D., Aragao, D., Williams, M., Flaig, R., Hall, D.R., McAuley, K.E., Mazzorana, M., Stuart, D.I., von Delft, F., Walsh, M.A.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2020-03-25
  Type: Initial release
  
• Version 2.0: 2020-04-01
  Type: Coordinate replacement
  Reason: Sequence discrepancy
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Polymer sequence, Refinement description, Source and taxonomy, Structure summary
• Version 2.1: 2020-04-08
  Changes: Source and taxonomy
• Version 2.2: 2020-05-06
  Changes: Database references, Source and taxonomy, Structure summary
• Version 2.3: 2020-10-21
  Changes: Advisory, Structure summary
• Version 3.0: 2021-12-22
  Type: Coordinate replacement
  Reason: Chirality error
  Changes: Advisory, Atomic model, Author supporting evidence, Data collection, Database references, Derived calculations, Non-polymer description, Other, Polymer sequence, Refinement description, Source and taxonomy, Structure summary
• Version 3.1: 2023-03-29
  Changes: Structure summary
• Version 3.2: 2024-02-07
  Changes: Data collection, Refinement description