1ASN

CRYSTAL STRUCTURES OF ESCHERICHIA COLI ASPARTATE AMINOTRANSFERASE IN TWO CONFORMATIONS: COMPARISON OF AN UNLIGANDED OPEN AND TWO LIGANDED CLOSED FORMS

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)	ASPARTATE AMINOTRANSFERASE	polymer	396	43619.2	2	UniProt (P00509) Pfam (PF00155)	Escherichia coli
2	C, E (A, B)	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
3	D, F (A, B)	PYRIDOXAL-5'-PHOSPHATE	non-polymer		247.1	2	Chemie (PLP)
4	G, H (A, B)	water	water		18.0	228	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	87238.4
Non-Polymers*	Number of molecules	4
	Total formula weight	686.4
All*	Total formula weight	87924.8

*Water molecules are not included.