vibo-Quercitol - CAS 488-76-6
Catalog number: 488-76-6
Not Intended for Therapeutic Use. For research use only.
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vibo-Quercitol isolated from the herb of Itea yunnanensis Franch.
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1-D-3-DEOXY-MYO-INOSITOL; 1-Deoxy-L-chiro-inositol; L-Quercitol
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1.Biosynthesis and production of quercitols and their application in the production of pharmaceuticals: current status and prospects.
Itoh N Appl Microbiol Biotechnol. 2018 Jun;102(11):4641-4651. doi: 10.1007/s00253-018-8972-y. Epub 2018 Apr 17.
(-)-vibo-Quercitol is a deoxyinositol (1L-1,2,4/3,5-cyclohexanepentol) that occurs naturally in low concentrations in oak species, honeydew honey, and Gymnema sylvestre. The author's research group recently reported that (-)-vibo-quercitol and scyllo-quercitol (2-deoxy-myo-inositol, 1,3,5/2,4-cyclohexanepentol), a stereoisomer of (-)-vibo-quercitol, are stereoselectively synthesized from 2-deoxy-scyllo-inosose by the reductive reaction of a novel (-)-vibo-quercitol 1-dehydrogenase in Burkholderia terrae and of a known scyllo-inositol dehydrogenase in Bacillus subtilis, respectively. The author's research group therefore identified two enzymes capable of producing both stereoisomers of deoxyinositols, which are rare in nature. (-)-vibo-Quercitol and scyllo-quercitol are potential intermediates for pharmaceuticals. In this review, the author describes the biosynthesis and enzymatic production of quercitols and myo-inositol stereoisomers and their application in the production of potential pharmaceuticals.
2.Isolation of 2-deoxy-scyllo-inosose (DOI)-assimilating yeasts and cloning and characterization of the DOI reductase gene of Cryptococcus podzolicus ND1.
Ara S;Yamazaki H;Takaku H J Biosci Bioeng. 2018 Apr;125(4):397-406. doi: 10.1016/j.jbiosc.2017.10.019. Epub 2017 Nov 26.
2-Deoxy-scyllo-inosose (DOI) is the first intermediate in the 2-deoxystreptamine-containing aminoglycoside antibiotic biosynthesis pathway and has a six-membered carbocycle structure. DOI is a valuable material because it is easily converted to aromatic compounds and carbasugar derivatives. In this study, we isolated yeast strains capable of assimilating DOI as a carbon source. One of the strains, Cryptococcus podzolicus ND1, mainly converted DOI to scyllo-quercitol and (-)-vibo-quercitol, which is a valuable compound used as an antihypoglycemia agent and as a heat storage material. An NADH-dependent DOI reductase coding gene, DOIR, from C. podzolicus ND1 was cloned and successfully overexpressed in Escherichia coli. The purified protein catalyzed the irreversible reduction of DOI with NADH and converted DOI into (-)-vibo-quercitol. The enzyme had an optimal pH of 8.5 and optimal temperature of 35°C, respectively. The k;cat; of this enzyme was 9.
3.A myo-inositol D-3 hydroxykinase activity in Dictyostelium.
Stephens LR;Kay RR;Irvine RF Biochem J. 1990 Nov 15;272(1):201-10.
A soluble ATP-dependent enzyme which phosphorylates myo-inositol has been characterized in Dictyostelium. The myo-inositol kinase activity was partially purified from amoebae by chromatography on DEAE-Sepharose and phenyl-Sepharose columns. The product of both the partially purified activity and of a crude cytosolic fraction was myo-inositol 3-phosphate. The partially purified preparations of myo-inositol kinase (a) possessed a Km for myo-inositol of 120 microM (in the presence of 5 mM-ATP) and for ATP of 125 microM (in the presence of 1 microM-myo-inositol), (b) did not recognize allo-, epi-, muco-, neo-, scyllo-, 1 D-chiro or 1 L-chiro-inositol as substrates, (c) were competitively inhibited by three naturally occurring analogues of myo-inositol: 1 L-chiro-inositol (Ki 49.5 +/- 0.7 microM: the structural equivalent of myo-inositol, except that the D-3 hydroxy moiety is axial), D-3-deoxy-myo-inositol [Ki 103 +/- 1 microM: (-)-viburnitol], and sequoyitol (Ki 271 +/- 7 microM; unlike 1 L-chiro-inositol and D-3-deoxy-myo-inositol, this was a substrate for the kinase), and finally (d) were apparently non-competitively inhibited by myo-inositol 3-phosphate.
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CAS 488-76-6 vibo-Quercitol

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