4BEB

MUTANT (K220E) OF THE HSDR SUBUNIT OF THE ECOR124I RESTRICTION ENZYME IN COMPLEX WITH ATP

Replaces:  2Y3T

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D (A, B, C, D)	TYPE I RESTRICTION ENZYME HSDR	polymer	1038	120278.8	4	UniProt (Q304R3) Pfam (PF04313) Pfam (PF18766) Pfam (PF22679) Pfam (PF12008) UniProt (by SIFTS) (P10486)	ESCHERICHIA COLI
2	E, G, I, K (A, B, C, D)	MAGNESIUM ION	non-polymer		24.3	4	Chemie (MG)
3	F, H, J, L (A, B, C, D)	ADENOSINE-5'-TRIPHOSPHATE	non-polymer		507.2	4	Chemie (ATP)

Sequence modifications

A, B, C, D: 1 - 1038 (UniProt: Q304R3)

PDB	External Database	Details
Glu 220	Lys 220	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	481115.2
Non-Polymers*	Number of molecules	8
	Total formula weight	2125.9
All*	Total formula weight	483241.1

*Water molecules are not included.