4NYN

Crystal structure of RNase H1 from halophilic archaeon Halobacterium salinarum NRC-1

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)	Ribonuclease HI	polymer	199	21001.8	2	UniProt (Q9HSF6) Pfam (PF13456)	Halobacterium	Halo-RNase HI, RNase HI
2	C, D, E, F, G (A, B)	MANGANESE (II) ION	non-polymer		54.9	5	Chemie (MN)
3	H, I (A, B)	water	water		18.0	301	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	42003.6
Non-Polymers*	Number of molecules	5
	Total formula weight	274.7
All*	Total formula weight	42278.3

*Water molecules are not included.