Record Information
Version1.0
StatusDetected and Quantified
Creation Date2021-11-17 23:43:16 UTC
Update Date2022-08-31 17:18:54 UTC
Metabolite IDMMDBc0029825
Metabolite Identification
Common Name3-Dehydro-L-gulonate
Description3-Dehydro-L-gulonate is an intermediate in ascorbic acid degradation. It is a substrate for the enzyme 2,3-diketo-L-gulonate reductase. This enzyme catalyzes the reduction of 2,3-diketo-L-gulonate in the presence of NADH, to form 3-keto-L-gulonate. It participates in the reaction: 3-dehydro-L-gulonate + NAD(P)+ = (4R,5S)-4,5,6-trihydroxy-2,3-dioxohexanoate + NAD(P)H. Several pathways for the irreversible catabolism of ascorbate have been described. Facultatively aerobic bacteria such as Escherichia coli degrade L-ascorbate by different pathways under aerobic and anaerobic conditions. The anaerobic pathway begins with phosphorylation of ascorbate (mediated by a PTS-type transporter), while the aerobic pathway proceeds via 2,3-dioxo-L-gulonate. Both pathways produce D-xylulose 5-phosphate, a centeral metabolite that is fed into the pentose phosphate pathway.
Structure
Synonyms
ValueSource
3-Dehydro-L-gulonic acidGenerator
L-Xylo-hex-3-ulosonic acidHMDB
Molecular FormulaC6H10O7
Average Mass194.1394
Monoisotopic Mass194.042652674
IUPAC Name(2S,4R,5S)-2,4,5,6-tetrahydroxy-3-oxohexanoic acid
Traditional Name3-dehydro-L-gulonic acid
CAS Registry NumberNot Available
SMILES
OC[C@H](O)[C@@H](O)C(=O)[C@H](O)C(O)=O
InChI Identifier
InChI=1S/C6H10O7/c7-1-2(8)3(9)4(10)5(11)6(12)13/h2-3,5,7-9,11H,1H2,(H,12,13)/t2-,3+,5-/m0/s1
InChI KeyWTAHRPBPWHCMHW-LWKDLAHASA-N