1G99

AN ANCIENT ENZYME: ACETATE KINASE FROM METHANOSARCINA THERMOPHILA

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	ACETATE KINASE	polymer	408	44394.0	2	UniProt (P38502) Pfam (PF00871) In PDB	Methanosarcina thermophila
2	A, B	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
3	A, B	ADENOSINE-5'-DIPHOSPHATE	non-polymer		427.2	2	Chemie (ADP)
4		water	water		18.0	158	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	88788.0
Non-Polymers*	Number of molecules	4
	Total formula weight	1046.5
All*	Total formula weight	89834.5

*Water molecules are not included.