7XAX

Crystal structure of SARS coronavirus main protease in complex with Baicalei

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 nsp5	polymer	306	33876.6	2	UniProt (P0C6U8) Pfam (PF05409) UniProt (by SIFTS) (P0C6X7) In PDB	Severe acute respiratory syndrome coronavirus 2	3CL-PRO,3CLp,Main protease,Mpro,Non-structural protein 5,nsp5,SARS coronavirus main proteinase
2	A	5,6,7-trihydroxy-2-phenyl-4H-chromen-4-one	non-polymer		270.2	1	Chemie (3WL)
3		water	water		18.0	91	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	67753.3
Non-Polymers*	Number of molecules	1
	Total formula weight	270.2
All*	Total formula weight	68023.5

*Water molecules are not included.