Record Information
Version2.0
StatusDetected and Quantified
Creation Date2021-11-18 01:57:49 UTC
Update Date2025-11-05 17:13:01 UTC
Metabolite IDMMDBc0031992
Metabolite Identification
Common NameFMNH2
DescriptionFMNH2 is a reduced form of flavin mononucleotide, classified as a flavin cofactor. Its chemical structure features a ribityl side chain attached to a flavin moiety, which plays a crucial role in various biochemical pathways. FMNH2 participates in electron transfer reactions, such as the key step involving electron transfer from FMNH2 to triplet-state mScarlet3, resulting in a triplet spin-correlated radical pair (PMID:40372769 ). It is also involved in enzymatic reactions, where reduced flavin (FMNH2) converts CypL∗ to CypL through the FRase reaction, leading to light emission upon reaction with O2 (PMID:39798538 ). Additionally, FMNH2 is integral to the function of flavin-dependent enzymes, such as the Old Yellow Enzyme (OYE), which utilizes FMNH2 for cofactor regeneration in hydrogenase systems (PMID:39244618 ). Moreover, FMNH2 monooxygenase and cytochrome P450 are notable for their roles in the degradation of compounds like endosulfan (PMID:38860796 ). The evolving understanding of FMNH2's role in enzymatic processes highlights its significance in various metabolic pathways and its interaction with other biomolecules (PMID:38399793 , PMID:38263732 ).
Structure
Synonyms
ValueSource
1,5-Dihydroriboflavin 5'-(dihydrogen phosphate)ChEBI
Flavin mononucleotide (reduced)ChEBI
FMNHChEBI
Reduced FMNChEBI
1,5-Dihydroriboflavin 5'-(dihydrogen phosphoric acid)Generator
Reduced flavin mononucleotideHMDB
Flavin mononucleotide hydroquinoneMeSH, HMDB
Molecular FormulaC17H23N4O9P
Average Mass458.3597
Monoisotopic Mass458.120264866
IUPAC Name{[(2R,3S,4S)-5-{7,8-dimethyl-2,4-dioxo-1H,2H,3H,4H,5H,10H-benzo[g]pteridin-10-yl}-2,3,4-trihydroxypentyl]oxy}phosphonic acid
Traditional Namefmnh(.)
CAS Registry NumberNot Available
SMILES
CC1=CC2=C(C=C1C)N(C[C@H](O)[C@H](O)[C@H](O)COP(O)(O)=O)C1=C(N2)C(=O)NC(=O)N1
InChI Identifier
InChI=1S/C17H23N4O9P/c1-7-3-9-10(4-8(7)2)21(15-13(18-9)16(25)20-17(26)19-15)5-11(22)14(24)12(23)6-30-31(27,28)29/h3-4,11-12,14,18,22-24H,5-6H2,1-2H3,(H2,27,28,29)(H2,19,20,25,26)/t11-,12+,14-/m0/s1
InChI KeyYTNIXZGTHTVJBW-SCRDCRAPSA-N