4TS0

Crystal structure of the Spinach RNA aptamer in complex with DFHBI, barium ions

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	X	Spinach RNA aptamer, bimolecular construct	polymer	44	14394.6	1		synthetic construct
2	Y	Spinach RNA aptamer, bimolecular construct	polymer	47	15220.9	1		synthetic construct
3	A, B, C, D	beta-D-fructofuranose-(2-1)-alpha-D-glucopyranose	branched		342.3	4	In PDB BIRD (PRD_900003)		sucrose
4	X, Y	POTASSIUM ION	non-polymer		39.1	10	Chemie (K)
5	X	BARIUM ION	non-polymer		137.3	1	Chemie (BA)
6	Y	(5Z)-5-(3,5-difluoro-4-hydroxybenzylidene)-2,3-dimethyl-3,5-dihydro-4H-imidazol-4-one	non-polymer		252.2	1	Chemie (38E)
7		water	water		18.0	15	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	29615.5
Branched	Number of molecules	4
	Total formula weight	1369.2
Non-Polymers*	Number of molecules	12
	Total formula weight	780.5
All*	Total formula weight	31765.2

*Water molecules are not included.