J
Joong-Hoon Ahn
Researcher at Konkuk University
Publications - 150
Citations - 3163
Joong-Hoon Ahn is an academic researcher from Konkuk University. The author has contributed to research in topics: Kaempferol & O-methyltransferase. The author has an hindex of 30, co-authored 145 publications receiving 2713 citations. Previous affiliations of Joong-Hoon Ahn include Gwangju Institute of Science and Technology.
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Flavonoid 3'-O-methyltransferase from rice: cDNA cloning, characterization and functional expression.
TL;DR: NMR analysis showed that ROMT-9 converted flavonoids containing the 3'-hydroxy functional group such as eriodictyol, luteolin, quercetin and taxifolin into the corresponding methoxy derivatives, suggesting that ROMt-9 is an OMT with strict specificity for the 3-hydroxyl group of flavonoid compounds.
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Regiospecific methylation of naringenin to ponciretin by soybean O-methyltransferase expressed in Escherichia coli.
TL;DR: SOMT-2 may have a regiospecific methylation activity, resulting in transforming 4'-hydroxyl group of flavonoids B-ring to 4'-methyl group, which has an effect on the solubility and thus on the antimicrobial activity of the flavonoid.
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Production of three phenylethanoids, tyrosol, hydroxytyrosol, and salidroside, using plant genes expressing in Escherichia coli
TL;DR: Polyphenols, which include phenolic acids, flavonoids, stilbenes, and phenylethanoids, are generally known as useful antioxidants and have various biological activities, including the prevention of cardiovascular diseases, cancer, and brain damage.
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Biosynthesis of bioactive O -methylated flavonoids in Escherichia coli
TL;DR: Two bioactive O-methylflavonoids, sakuranetin and ponciretin, were synthesized in Escherichia coli from glucose in E. coli to reconstruct the naringenin biosynthesis pathway and increase the supply of Coenzyme A.
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Production of a Novel Quercetin Glycoside through Metabolic Engineering of Escherichia coli
TL;DR: To synthesize an unnatural flavonoid glycoside, Actinobacillus actinomycetemcomitans gene tll (encoding dTDP-6-deoxy-l-lyxo-4-hexulose reductase) was introduced into Escherichia coli, and nucleotide-sugar dependent glycosyltransferases (UGTs) were screened to find a UGT that could use dTTP- 6-deoxyt