Biomaterial Database

Preparation and properties of rutin-hydrolyzing enzyme from tartary buckwheat seeds. 2012

Xiao-Dong Cui, and Zhuan-Hua Wang

Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan 030006, PR China.

A rutin hydrolyzing enzyme (RHE) was isolated from Fagopyrum tataricum Moench seeds by using ammonium sulphate fractionation, anion exchange and size exclusion chromatography. The purified RHE has an apparent molecular weight of about 70kDa determined by SDS-PAGE, with an isoelectric point (pI) (determined by isoelectric focusing) of 6.7. RHE has a specific catalytic activity toward rutin when incubated together with rutin at 37°C for 30min in the presence of 20% ethanol, and its Km value for rutin is 1.04×10(-3)M. The RHE catalytic product analyzed by HPLC displayed high similarity with quercetin and this is confirmed by (1)H NMR spectroscopy and LC-ESI-MS/MS, suggesting that the RHE hydrolysis product is quercetin. These results suggest that the RHE from tartary buckwheat seeds is a specific rutin-hydrolyzing enzyme, providing a new enzymatic preparation method for quercetin.

UI	MeSH Term	Description	Entries
D011794	Quercetin	A flavonol widely distributed in plants. It is an antioxidant, like many other phenolic heterocyclic compounds. Glycosylated forms include RUTIN and quercetrin.	3,3',4',5,7-Pentahydroxyflavone,Dikvertin
D004591	Electrophoresis, Polyacrylamide Gel	Electrophoresis in which a polyacrylamide gel is used as the diffusion medium.	Polyacrylamide Gel Electrophoresis,SDS-PAGE,Sodium Dodecyl Sulfate-PAGE,Gel Electrophoresis, Polyacrylamide,SDS PAGE,Sodium Dodecyl Sulfate PAGE,Sodium Dodecyl Sulfate-PAGEs
D006868	Hydrolysis	The process of cleaving a chemical compound by the addition of a molecule of water.
D012431	Rutin	A flavonol glycoside found in many plants, including BUCKWHEAT; TOBACCO; FORSYTHIA; HYDRANGEA; VIOLA, etc. It has been used therapeutically to decrease capillary fragility.	3-Rhamnosyl-Glucosyl Quercetin,Quercetin-3-Rutinoside,Rutoside,Quercetin 3 Rutinoside,Quercetin, 3-Rhamnosyl-Glucosyl
D012639	Seeds	The encapsulated embryos of flowering plants. They are used as is or for animal feed because of the high content of concentrated nutrients like starches, proteins, and fats. Rapeseed, cottonseed, and sunflower seed are also produced for the oils (fats) they yield.	Diaspores,Elaiosomes,Embryos, Plant,Plant Embryos,Plant Zygotes,Zygotes, Plant,Diaspore,Elaiosome,Embryo, Plant,Plant Embryo,Plant Zygote,Seed,Zygote, Plant
D019612	Fagopyrum	A plant genus of the family POLYGONACEAE that is used as an EDIBLE GRAIN. Although the seeds are used as cereal, the plant is not one of the cereal grasses (POACEAE).	Buckwheat,Fagopyrum esculentum,Fagopyrum sagittatum,Fagopyrum tataricum,Buckwheats