3SM1

The crystal structure of XMRV protease complexed with pepstatin A

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)	gag-pro-pol polyprotein	polymer	132	14345.3	2	UniProt (Q9E7M1) Pfam (PF00077)	DG-75 Murine leukemia virus
2	C, D (J, M)	Pepstatin A	polymer	6	685.9	2	BIRD (PRD_000557)	Streptomyces argenteolus subsp. toyonakensis
3	E, F (B)	FORMIC ACID	non-polymer		46.0	2	Chemie (FMT)
4	G, H, I (A, B, J)	water	water		18.0	166	Chemie (HOH)

Sequence modifications

A, B: 1 - 125 (UniProt: Q9E7M1)

PDB	External Database	Details
Met -6	-	expression tag
His -5	-	expression tag
His -4	-	expression tag
His -3	-	expression tag
His -2	-	expression tag
His -1	-	expression tag
His 0	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	30062.4
Non-Polymers*	Number of molecules	2
	Total formula weight	92.0
All*	Total formula weight	30154.4

*Water molecules are not included.