Search results
Results from the WOW.Com Content Network
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
The enzyme 3-dehydroquinate dehydratase (EC 4.2.1.10) catalyzes the chemical reaction. 3-dehydroquinate 3-dehydroshikimate + H 2 O. This enzyme belongs to the family of lyases, specifically the hydro-lyases, which cleave carbon-oxygen bonds. This enzyme participates in phenylalanine, tyrosine and tryptophan biosynthesis
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 + .
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.
The fifth enzyme involved is the shikimate kinase, an enzyme that catalyzes the ATP-dependent phosphorylation of shikimate to form shikimate 3-phosphate (shown in the figure below). [1] [2] Shikimate 3-phosphate is then coupled with phosphoenol pyruvate to give 5-enolpyruvylshikimate-3-phosphate via the enzyme 5-enolpyruvylshikimate-3-phosphate ...
This page was last edited on 17 December 2012, at 11:51 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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.
"Nova godina kuca na vratima 1" 3 November 2015 () 201: 9 "Nova godina kuca na vratima 2" 4 November 2015 () 202: 10 "Faruka se namjerio na doktorku, a Izet na sač" 6 October 2015 () 203: 11 "Izet je u ratarskom biznisu, a Faruk se navukao na lijepak" 7 October 2015 () 204: 12