3-Dehydroquinic acid (DHQ) is the first carbocyclic intermediate of the shikimate pathway. It is created from 3-deoxyarabinoheptulosonate 7-phosphate, a 7-carbon ulonic acid, by the enzyme DHQ synthase. The mechanism of ring closure is complex, but involves an aldol condensation at C-2 and C-7.
It has the same structure as quinic acid, which is found in coffee, but the C-3 hydroxyl is oxidized to a ketone group. 3-Dehydroquinic acid undergoes five further enzymatic steps in the remainder of the shikimate pathway to chorismic acid, a precursor to tyrosine, 3-phenylalanine, tryptophan, and some vitamins, including:
Vitamin K
Pteroylmonoglutamic acid, called folate.
3-Dehydroquinate can also be a precursor to pyrroloquinoline quinone (PQQ), an alternate redox coenzyme involved in oxidative phosphorylation. |
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InChI=1S/C7H10O6/c8-3-1-7(13,6(11)12)2-4(9)5(3)10/h3,5,8,10,13H,1-2H2,(H,11,12)/t3-,5+,7-/m1/s1 |
WVMWZWGZRAXUBK-SYTVJDICSA-N |
O[C@@H]1C[C@@](O)(CC(=O)[C@H]1O)C(O)=O |
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Bronsted acid
A molecular entity capable of donating a hydron to an acceptor (Bronsted base).
(via oxoacid )
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Escherichia coli metabolite
Any bacterial metabolite produced during a metabolic reaction in Escherichia coli.
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View more via ChEBI Ontology
rel-(1R,3R,4S)-1,3,4-trihydroxy-5-oxocyclohexanecarboxylic acid
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3-Dehydroquinic acid
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KEGG COMPOUND
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5-Dehydroquinic acid
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KEGG COMPOUND
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2115114
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Reaxys Registry Number
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Reaxys
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2005-03-09
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The numbering system used for 3-dehydroquinic acid is that of the IUPAC/CBN recommendations on cyclitols, sections I-8 and I-9. The use of the term '5-dehydroquinic acid' for this compound is based on an earlier system of numbering (for example of use, see S. Mitsuhashi and B. D. Davis, Biochim. Biophys. Acta, 1954, 15, 268-280).
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