3C0X

I-SceI in complex with a top nicked DNA substrate

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	B	DNA (5'-D(*DC*DAP*DCP*DGP*DCP*DTP*DAP*DGP*DGP*DGP*DAP*DTP*DAP*DA)-3')	polymer	14	4313.8	1
2	C	DNA (5'-D(P*DCP*DAP*DGP*DGP*DGP*DTP*DAP*DAP*DTP*DAP*DC)-3')	polymer	11	3382.2	1
3	D	DNA (5'-D(*DG*DGP*DTP*DAP*DTP*DTP*DAP*DCP*DCP*DCP*DTP*DGP*DTP*DTP*DAP*DTP*DCP*DCP*DCP*DTP*DAP*DGP*DCP*DGP*DT)-3')	polymer	25	7615.9	1
4	A	Intron-encoded endonuclease I-SceI	polymer	235	27717.2	1	UniProt (P03882) Pfam (PF03161) In PDB	Saccharomyces cerevisiae (baker's yeast)	21S rRNA intron maturase, Homing endonuclease omega
5	C, A	CALCIUM ION	non-polymer		40.1	3	Chemie (CA)
6		water	water		18.0	58	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	43029.2
Non-Polymers*	Number of molecules	3
	Total formula weight	120.2
All*	Total formula weight	43149.4

*Water molecules are not included.