3OOL

I-SceI complexed with C/G+4 DNA substrate

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	Intron encoded endonuclease I-SceI	polymer	237	27986.6	1	UniProt (P03882) Pfam (PF03161)	Saccharomyces cerevisiae (yeast)	21S rRNA intron maturase, Homing endonuclease omega
2	B (C)	5'-D(*CP*AP*CP*GP*CP*TP*AP*GP*GP*GP*AP*TP*AP*AP*CP*CP*GP*GP*GP*TP*AP*AP*TP*AP*C)-3'	polymer	25	7717.0	1
3	C (D)	5'-D(*GP*GP*TP*AP*TP*TP*AP*CP*CP*CP*GP*GP*TP*TP*AP*TP*CP*CP*CP*TP*AP*GP*CP*GP*T)-3'	polymer	25	7640.9	1
4	D, E, F (A, C)	CALCIUM ION	non-polymer		40.1	3	Chemie (CA)
5	G, H, I (A, C, D)	water	water		18.0	36	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	43344.5
Non-Polymers*	Number of molecules	3
	Total formula weight	120.2
All*	Total formula weight	43464.7

*Water molecules are not included.