8IG5

Crystal structure of SARS main protease in complex with GC376

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	3C-like proteinase nsp5	polymer	299	33169.9	2	UniProt (P0C6U8) Pfam (PF05409) UniProt (by SIFTS) (P0DTD1)	Severe acute respiratory syndrome-related coronavirus	3CL-PRO,3CLp,Main protease,Mpro,Non-structural protein 5,nsp5,SARS coronavirus main proteinase
2	C, D (A, B)	N~2~-[(benzyloxy)carbonyl]-N-{(2S)-1-hydroxy-3-[(3S)-2-oxopyrrolidin-3-yl]propan-2-yl}-L-leucinamide	non-polymer		405.5	2	Chemie (UED)
3	E, F (A, B)	water	water		18.0	56	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	66339.8
Non-Polymers*	Number of molecules	2
	Total formula weight	811.0
All*	Total formula weight	67150.8

*Water molecules are not included.