3SD3

The structure of the tetrahydrofolate riboswitch containing a U25C mutation

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	Tetrahydrofolate riboswitch	polymer	89	28848.2	1
2	A	IRIDIUM HEXAMMINE ION	non-polymer		294.4	5	Chemie (IRI)
3	A	N-[4-({[(6S)-2-amino-5-formyl-4-oxo-3,4,5,6,7,8-hexahydropteridin-6-yl]methyl}amino)benzoyl]-L-glutamic acid	non-polymer		473.4	1	Chemie (FFO)
4		water	water		18.0	103	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	28848.2
Non-Polymers*	Number of molecules	6
	Total formula weight	1945.4
All*	Total formula weight	30793.6

*Water molecules are not included.