2A5A

Crystal structure of unbound SARS coronavirus main peptidase in the space group C2

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 peptidase	polymer	306	33876.6	1	UniProt (P59641) Pfam (PF05409) UniProt (by SIFTS) (P0C6X7) In PDB	SARS coronavirus	3CL-PRO, 3CLp, NSP2
2	A	CHLORIDE ION	non-polymer		35.5	2	Chemie (CL)
3	A	1,2-ETHANEDIOL	non-polymer		62.1	1	Chemie (EDO)
4		water	water		18.0	145	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	33876.6
Non-Polymers*	Number of molecules	3
	Total formula weight	133.0
All*	Total formula weight	34009.6

*Water molecules are not included.