3F4E

Crystal structure of the FMN riboswitch bound to FMN, split RNA.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	X	FMN riboswitch	polymer	54	17455.4	1	GenBank (20095250)
2	Y	FMN riboswitch	polymer	56	18092.8	1	GenBank (20095250)
3	X	POTASSIUM ION	non-polymer		39.1	1	Chemie (K)
4	X, Y	MAGNESIUM ION	non-polymer		24.3	13	Chemie (MG)
5	Y	FLAVIN MONONUCLEOTIDE	non-polymer		456.3	1	Chemie (FMN)
6		water	water		18.0	2	Chemie (HOH)

Sequence modifications

X: 3 - 54 (GenBank: 20095250)

PDB	External Database	Details
G 1	-	insertion
G 2	-	insertion
C 52	U 2544	engineered mutation
U 53	A 2545	engineered mutation

Y: 57 - 109 (GenBank: 20095250)

PDB	External Database	Details
U 110	-	insertion
U 111	-	insertion
C 112	-	insertion

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	35548.2
Non-Polymers*	Number of molecules	15
	Total formula weight	811.4
All*	Total formula weight	36359.6

*Water molecules are not included.