3FU2

Cocrystal structure of a class-I preQ1 riboswitch

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 (A, B, C)	PreQ1 riboswitch	polymer	34	10835.5	3
2	D, J, M (A, B, C)	7-DEAZA-7-AMINOMETHYL-GUANINE	non-polymer		179.2	3	Chemie (PRF)
3	E, F, G, H, I... (A, B, C)	CALCIUM ION	non-polymer		40.1	9	Chemie (CA)
4	P, Q, R (A, B, C)	water	water		18.0	21	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	32506.6
Non-Polymers*	Number of molecules	12
	Total formula weight	898.2
All*	Total formula weight	33404.8

*Water molecules are not included.