2AR0

Crystal structure of Type I restriction enzyme EcoKI M protein (EC 2.1.1.72) (M.EcoKI)

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)	Type I restriction enzyme EcoKI M protein	polymer	541	61253.6	2	UniProt (P08957) Pfam (PF12161) Pfam (PF02384)	Escherichia coli	M.EcoKI
2	C, D, E, F, G... (A)	UNKNOWN ATOM OR ION	non-polymer			10	Chemie (UNX)
3	M, N (A, B)	water	water		18.0	143	Chemie (HOH)

Sequence modifications

A, B: 4 - 529 (UniProt: P08957)

PDB	External Database	Details
Mse 1	-	cloning artifact
Ser 2	-	cloning artifact
Leu 3	-	cloning artifact
Mse 41	Met 39	modified residue
Mse 76	Met 74	modified residue
Mse 112	Met 110	modified residue
Mse 132	Met 130	modified residue
Mse 229	Met 227	modified residue
Mse 295	Met 293	modified residue
Mse 331	Met 329	modified residue
Mse 386	Met 384	modified residue
Mse 492	Met 490	modified residue
Mse 506	Met 504	modified residue
Lys 530	-	expression tag
Glu 531	-	expression tag
Glu 532	-	expression tag
Gly 533	-	expression tag
Gly 534	-	expression tag
Ser 535	-	expression tag
His 536	-	expression tag
His 537	-	expression tag
His 538	-	expression tag
His 539	-	expression tag
His 540	-	expression tag
His 541	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	122507.2
Non-Polymers*	Number of molecules	10
	Total formula weight	0.0
All*	Total formula weight	122507.2

*Water molecules are not included.