4AQU

Crystal structure of I-CreI complexed with its target methylated at position plus 2 (in the b strand) in the presence of calcium

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	DNA ENDONUCLEASE I-CREI	polymer	152	17516.1	2	UniProt (P05725) Pfam (PF00961) In PDB	CHLAMYDOMONAS REINHARDTII	23S RRNA INTRON PROTEIN
2	C	5'-D(*DTP*CP*AP*AP*AP*AP*CP*GP*TP*CP*GP*TP*GP*DAP *GP*AP*CP*AP*GP*TP*TP*TP*GP*G)-3'	polymer	24	7433.8	1		SYNTHETIC CONSTRUCT
3	D	5'-D(*DCP*CP*AP*AP*AP*CP*TP*GP*TP*CP*TP*CP*AP*5CMP *GP*AP*CP*GP*TP*TP*TP*TP*GP*A)-3'	polymer	24	7318.8	1		SYNTHETIC CONSTRUCT
4	A	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
5	A, B	GLYCEROL	non-polymer		92.1	2	Chemie (GOL)
6		water	water		18.0	102	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	49784.8
Non-Polymers*	Number of molecules	4
	Total formula weight	264.3
All*	Total formula weight	50049.2

*Water molecules are not included.