1A96

XPRTASE FROM E. COLI WITH BOUND CPRPP AND XANTHINE

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D (A, B, C, D)	XANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE	polymer	152	16991.6	4	UniProt (P0A9M5) Pfam (PF00156)	Escherichia coli	XPRT
2	E, L (A, D)	BORIC ACID	non-polymer		61.8	2	Chemie (BO3)
3	F, I (B, C)	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
4	G, J (B, C)	1-ALPHA-PYROPHOSPHORYL-2-ALPHA,3-ALPHA-DIHYDROXY-4-BETA-CYCLOPENTANE-METHANOL-5-PHOSPHATE	non-polymer		388.1	2	Chemie (PCP)
5	H, K (B, C)	XANTHINE	non-polymer		152.1	2	Chemie (XAN)
6	M, N, O, P (A, B, C, D)	water	water		18.0	142	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	67966.3
Non-Polymers*	Number of molecules	8
	Total formula weight	1252.7
All*	Total formula weight	69219.0

*Water molecules are not included.