5HR4

Structure of Type IIL restriction-modification enzyme MmeI in complex with DNA has implications for engineering of new specificities

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, D (C, J)	MmeI	polymer	919	105264.6	2	UniProt (B2MU09) Pfam (PF20464) Pfam (PF20465) Pfam (PF20473) Pfam (PF20466) Pfam (PF20467)	Methylophilus methylotrophus
2	B, E (H, K)	DNA (5'-D(P*TP*AP*TP*CP*CP*GP*AP*CP*AP*TP*AP*AP*C)-3')	polymer	13	3919.6	2		Methylophilus methylotrophus
3	C, F (I, L)	DNA (5'-D(P*GP*TP*TP*AP*TP*GP*TP*CP*GP*GP*AP*TP*A)-3')	polymer	13	4021.6	2		Methylophilus methylotrophus
4	G, I (C, J)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
5	H, J (C, J)	SINEFUNGIN	non-polymer		381.4	2	Chemie (SFG)
6	K, L, M, N, O... (C, H, I, J, K...)	water	water		18.0	63	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	226411.7
Non-Polymers*	Number of molecules	4
	Total formula weight	842.9
All*	Total formula weight	227254.7

*Water molecules are not included.