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Biosynthesis: The enzyme 3-dehydroquinate dehydratase uses 3-dehydroquinate to produce 3-dehydroshikimate and H 2 O. 3-Dehydroshikimate is then reduced to shikimic acid by the enzyme shikimate dehydrogenase, which uses nicotinamide adenine dinucleotide phosphate (NADPH) as a cofactor. Biosynthesis of shikimic acid from 3-dehydroquinate
In enzymology, a shikimate dehydrogenase (EC 1.1.1.25) is an enzyme that catalyzes the chemical reaction shikimate + NADP + ⇌ {\displaystyle \rightleftharpoons } 3-dehydroshikimate + NADPH + H + Thus, the two substrates of this enzyme are shikimate and NADP + , whereas its 3 products are 3-dehydroshikimate , NADPH , and H + .
The enzyme 3-dehydroquinate dehydratase (EC 4.2.1.10) catalyzes the chemical reaction 3-dehydroquinate ⇌ {\displaystyle \rightleftharpoons } 3-dehydroshikimate + H 2 O This enzyme belongs to the family of lyases , specifically the hydro-lyases, which cleave carbon-oxygen bonds.
3-dehydroshikimate dehydratase (EC 4.2.1.118) is an enzyme with systematic name 3-dehydroshikimate hydro-lyase. [ 1 ] [ 2 ] This enzyme catalyses the following chemical reaction 3-dehydro-shikimate ⇌ {\displaystyle \rightleftharpoons } 3,4-dihydroxybenzoate + H 2 O
(1) L-quinate + NAD(P) + 3-dehydroquinate + NAD(P)H + H + (2) shikimate + NAD(P) + ⇌ {\displaystyle \rightleftharpoons } 3-dehydroshikimate + NAD(P)H + H + This is the second shikimate dehydrogenase enzyme found in Escherichia coli and differs from EC 1.1.1.25 , shikimate dehydrogenase, in that it can use both quinate and shikimate as ...
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Shikimic acid can also be extracted from the seeds of the sweetgum (Liquidambar styraciflua) fruit, [2] which is abundant in North America, in yields of around 1.5%. For example, 4 kg (8.8 lb) of sweetgum seeds is needed for fourteen packages of Tamiflu. By comparison, star anise has been reported to yield 3% to 7% shikimic acid.
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