1PKX

Crystal Structure of human ATIC in complex with XMP

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)	Bifunctional purine biosynthesis protein PURH	polymer	592	64693.7	4	UniProt (P31939) Pfam (PF02142) Pfam (PF01808)	Homo sapiens (human)	ATIC
2	E, G, H, J (A, B, C, D)	POTASSIUM ION	non-polymer		39.1	4	Chemie (K)
3	F, I (A, C)	XANTHOSINE-5'-MONOPHOSPHATE	non-polymer		365.2	2	Chemie (XMP)
4	K, L, M, N (A, B, C, D)	water	water		18.0	977	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	258774.9
Non-Polymers*	Number of molecules	6
	Total formula weight	886.8
All*	Total formula weight	259661.7

*Water molecules are not included.