4J90

Square-shaped octameric structure of KtrA with ATP bound

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Ktr system potassium uptake protein A	polymer	222	24916.8	2	UniProt (O32080) Pfam (PF02254) Pfam (PF02080) In PDB	Bacillus subtilis	K(+)-uptake protein KtrA
2	A, B	ADENOSINE-5'-TRIPHOSPHATE	non-polymer		507.2	2	Chemie (ATP)
3		water	water		18.0	3	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	49833.5
Non-Polymers*	Number of molecules	2
	Total formula weight	1014.4
All*	Total formula weight	50847.9

*Water molecules are not included.