2EZV

Crystal structure of tetrameric restriction endonuclease SfiI bound to cognate DNA.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (F)	5'-D(*TP*GP*GP*CP*CP*AP*AP*CP*AP*AP*GP*GP*CP*CP*T)-3'	polymer	21	6447.2	1
2	B (G)	5'-D(*AP*GP*GP*CP*CP*TP*TP*GP*TP*TP*GP*GP*CP*CP*A)-3'	polymer	21	6438.2	1
3	C, D (A, B)	Type II restriction enzyme SfiI	polymer	269	31086.0	2	UniProt (O52512) Pfam (PF11487)		Endonuclease SfiI, R.SfiI
4	E, F (A, B)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
5	G, H, I, J (F, G, A, B)	water	water		18.0	179	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	75057.4
Non-Polymers*	Number of molecules	2
	Total formula weight	80.2
All*	Total formula weight	75137.5

*Water molecules are not included.