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Information on EC 1.3.2.3 - L-galactonolactone dehydrogenase

for references in articles please use BRENDA:EC1.3.2.3
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IUBMB Comments
This enzyme catalyses the final step in the biosynthesis of L-ascorbic acid in higher plants and in nearly all higher animals with the exception of primates and some birds . The enzyme is very specific for its substrate L-galactono-1,4-lactone as D-galactono-gamma-lactone, D-gulono-gamma-lactone, L-gulono-gamma-lactone, D-erythronic-gamma-lactone, D-xylonic-gamma-lactone, L-mannono-gamma-lactone, D-galactonate, D-glucuronate and D-gluconate are not substrates . FAD, NAD+, NADP+ and O2 (cf. EC 1.3.3.12, L-galactonolactone oxidase) cannot act as electron acceptor .
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The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
Synonyms
dehydrogenase, galactonolactone, ferricytochrome c oxidoreductase, galactono-1,4-lactone dehydrogenase, galactonolactone dehydrogenase, GALDH, GalL dehydrogenase, GalLDH, GLDase, GLDH, GLDH-A1, more
REACTION
REACTION DIAGRAM
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ORGANISM
UNIPROT
LITERATURE
L-galactono-1,4-lactone + 2 ferricytochrome c = L-ascorbate + 2 ferrocytochrome c + 2 H+
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