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Information on EC 4.1.99.12 - 3,4-dihydroxy-2-butanone-4-phosphate synthase

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EC Tree
     4 Lyases
         4.1 Carbon-carbon lyases
             4.1.99 Other carbon-carbon lyases
                4.1.99.12 3,4-dihydroxy-2-butanone-4-phosphate synthase
IUBMB Comments
Requires a divalent cation, preferably Mg2+, for activity . The reaction involves an intramolecular skeletal rearrangement, with the bonds in D-ribulose 5-phosphate that connect C-3 and C-5 to C-4 being broken, C-4 being removed as formate and reconnection of C-3 and C-5 . The phosphorylated four-carbon product (L-3,4-dihydroxybutan-2-one 4-phosphate) is an intermediate in the biosynthesis of riboflavin .
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The enzyme appears in viruses and cellular organisms
Synonyms
3,4-dihydroxy 2-butanone-4-phosphate synthase, 3,4-dihydroxy-2-butanone 4-phosphate synthase, 3,4-dihydroxy-2-butanone-4-phosphate synthase, AtRIBA1, AtRIBA2, bifunctional GCHYII/DHBP, bifunctional GTP cyclohydrolase II/3,4-dihydroxy-2-butanone 4-phosphate synthase, DBPS, DHBP synthase, DHBPS, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
D-ribulose 5-phosphate = formate + L-3,4-dihydroxybutan-2-one 4-phosphate
show the reaction diagram
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