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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
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 3,4-dihydroxybenzoate + H 2 O. This enzyme catalyses an early step in the biosynthesis of petrobactin.
In enzymology, a shikimate dehydrogenase (EC 1.1.1.25) is an enzyme that catalyzes the chemical reaction. shikimate + NADP + 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 +.
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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.
Shikimate 3-phosphate is then coupled with phosphoenol pyruvate to give 5-enolpyruvylshikimate-3-phosphate via the enzyme 5-enolpyruvylshikimate-3-phosphate (EPSP) synthase. Glyphosate, the herbicidal ingredient in Roundup , is a competitive inhibitor of EPSP synthase, acting as a transition state analog that binds more tightly to the EPSPS-S3P ...
Giselle Smith and Semaj Morris, 17, were both killed on Wednesday, Dec. 11, with Smith's sister Paris Kiper in critical condition
(2) shikimate + NAD(P) + 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 substrate, and either NAD + or NADP + as acceptor.