7UU9

Crystal structure of the SARS-CoV-2 main protease in its apo-form

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	3C-like proteinase nsp5	polymer	306	33873.5	1	UniProt (P0DTD1) Pfam (PF05409) In PDB	Severe acute respiratory syndrome coronavirus 2	3CL-PRO,3CLp,Main protease,Mpro,Non-structural protein 5,nsp5,SARS coronavirus main proteinase
2		water	water		18.0	68	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	33873.5
All*	Total formula weight	33873.5

*Water molecules are not included.