8D5L

Crystal structure of theophylline aptamer in complex with TAL1

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)	RNA (33-MER)	polymer	33	10637.4	4		synthetic construct
2	E, J, O, T (A, B, C, D)	4-amino-8-methylpteridine-2,7(1H,8H)-dione	non-polymer		193.2	4	Chemie (QIJ)
3	F, G, K, L, P... (A, B, C, D)	MAGNESIUM ION	non-polymer		24.3	6	Chemie (MG)
4	H, M, Q, V, W (A, B, C, D)	CALCIUM ION	non-polymer		40.1	5	Chemie (CA)
5	I, N, R, S (A, B, C)	SODIUM ION	non-polymer		23.0	4	Chemie (NA)
6	AA, X, Y, Z (D, A, B, C)	water	water		18.0	545	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	42549.7
Non-Polymers*	Number of molecules	19
	Total formula weight	1210.8
All*	Total formula weight	43760.5

*Water molecules are not included.