7C2Y

The crystal structure of COVID-2019 main protease in the apo state

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	3C-like proteinase	polymer	298	32974.6	2	UniProt (P0DTD1) Pfam (PF05409) In PDB	Severe acute respiratory syndrome coronavirus 2 (2019-nCoV)	pp1ab,ORF1ab polyprotein,3CL-PRO,3CLp,Main protease,Mpro,Non-structural protein 5,nsp5,SARS coronavirus main proteinase
2		water	water		18.0	185	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	65949.2
All*	Total formula weight	65949.2

*Water molecules are not included.