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Crystal structure of E. coli AIR synthetase bound to AMP

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)	Phosphoribosylformylglycinamidine cyclo-ligase	polymer	345	36890.9	4	UniProt (P08178) Pfam (PF00586) Pfam (PF02769)	Escherichia coli K-12	AIR synthase,AIRS,Phosphoribosyl-aminoimidazole synthetase
2	E, F, H, I, J... (A, B, C, D)	SULFATE ION	non-polymer		96.1	10	Chemie (SO4)
3	G, K, N (A, B, C)	ADENOSINE MONOPHOSPHATE	non-polymer		347.2	3	Chemie (AMP)
4	R, S, T, U (A, B, C, D)	water	water		18.0	386	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	147563.8
Non-Polymers*	Number of molecules	13
	Total formula weight	2002.3
All*	Total formula weight	149566.1

*Water molecules are not included.