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Catechol derivative prepared using tyrosinase, method for preparing same, and application of same

A catechol-type, tyrosinase technology, which is applied in the directions of medical preparations, drug combinations, and pharmaceutical formulations containing active ingredients, can solve the difficulties of tyrosinase inactivation and accumulation of catechol-type structural substances, etc. question

Active Publication Date: 2016-05-04
SEOUL NAT UNIV R&DB FOUND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, after the oxidation reaction of the monophenolic structural substance of oxygen-tyrosinase, the generated catechol-type structural substance cannot be oxidized by methionine-tyrosinase, and the methionine-tyrosinase Aminase accumulates due to inability to convert to deoxy-tyrosinase, tyrosinase is inactivated
[0011] Compared with the reaction rate constant (k1) of the first hydroxylation reaction (monophenolase activity), the rate constant (k2) of the second oxidation reaction (diphenolase activity) is about 10 times larger, so the accumulation of catechu as an intermediate product Difficulties with phenolic structure substances

Method used

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  • Catechol derivative prepared using tyrosinase, method for preparing same, and application of same
  • Catechol derivative prepared using tyrosinase, method for preparing same, and application of same
  • Catechol derivative prepared using tyrosinase, method for preparing same, and application of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Solubility change of initial substrate (monophenolic structure substance) according to pH

[0093] Daidzein (daidzein), which is an isoflavone series, has a low solubility in water, so in neutral water or a buffer solution at room temperature, it can be Dissolve about 300uM. However, it can be confirmed as follows: in the case of using a high-concentration boric acid buffer, the solubility increases as the pH becomes higher. In pH 9, the solubility increases more than ten times at a level of 5 mM, and in pH 10, the solubility increases at a level of 30 mM. Increased 100 times. Tyrosinase, unlike other monooxygenases, is active over a wide pH range, allowing the use of high concentrations of initial substrate to increase reaction productivity.

[0094] In pH 9, which is the range of tyrosinase activity, an in vitro (invitro) reaction of 5 mL containing 300 μM daidzein and 100 nM tyrosinase produced 15 mg of 3'-o-hydroxydaidzein per hour, whereas, The in vitro (invit...

Embodiment 2

[0096] Comparative experiment on the yield of catechol-type structural substances according to the reducing agent

[0097] The cells expressing the tyrosinase derived from Streptomyces avermitilis cultured according to the expression method 1 clearly shown above were not disrupted, but only the cells were washed, and 0.1 mM resveratrol, 1 mM various reducing agents were added (Reduced nicotinamide adenine dinucleotide, L-ascorbic acid, glutathione, cysteine, hydroxyquinone, 1-naphthol, p-coumaric acid, curcumin, catechol, pyrogallol or ferulic acid) to produce picetanol. After the reaction, after using the same amount of ethyl acetate (EA, ethylacetate) or non-polar solvent to extract, use high-performance-liquid chromatography quantitative analysis to compare the production efficiency of piceatanol based on the addition of reducing agent, and make it explicit in figure 2 middle.

Embodiment 3

[0099] Coordination Bonds of Catechol-type Structural Substances

[0100] As in reaction method 1, 200nM of purified tyrosinase derived from bone marrow transplantation (BMT) was used to carry out hydroxylation reaction of 500uM daidzein, and at this time, boronic acid was added to induce coordination bonds. Such as Figure 5 As shown in part (a), it was confirmed by high-performance-liquid chromatography that 3'-o-hydroxydaidzein, which forms a coordinate bond in the alkaline reaction solution, has hydrophilicity, so it is not extracted into an organic solvent. and, in Figure 5 In part (b), it was confirmed that when 2M HCl was treated, the coordination bond was released, and 200uM 3'-o-hydroxydaidzein was detected.

[0101] And, utilize the bone marrow transplantation tyrosinase of purification 300nM, also make 1mM genistein and apigenin carry out hydroxylation reaction, as Figure 6 As shown, it is confirmed by high performance-liquid chromatography that hydroxylated ...

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Abstract

The present invention relates to a technology related to the biosynthetic reaction of a catechol derivative using tyrosinase, for effectively preventing the diphenolase activity of tyrosinase and thereby selectively catalyzing only the monophenolase activity of a monophenolic compound. The present invention provides a technology for producing various functional catechol materials with high productivity and yield using same.

Description

technical field [0001] The present invention relates to a method for selectively producing only catechol-type compounds from various monophenol-type compounds (monophenolic compounds) with high productivity and yield using tyrosinase having broad substrate specificity. Thus, the present invention can realize mass production of functional catechol-type structural substances utilizing enzyme reactions, and can be applied to raw materials and production of medical products. Background technique [0002] It is reported that many catechol derivatives exhibit good physiological activities in anti-oxidation, anti-cancer, anti-inflammation or anti-virus effects, and their effects are higher than those of monophenolic compounds . In particular, catechol-type structural substances are used as inhibitors of tyrosinase, and have an effect of reducing melanin production by tyrosinase. Also, it is well known that among daidzeins (isoflavones derived from soybeans), 3'-o-hydroxydaidzein ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/32A61K31/353C12P7/22A61P35/00
CPCA61P35/00C07D311/32C12P7/22A61K31/353
Inventor 金秉祺李相赫白基宪
Owner SEOUL NAT UNIV R&DB FOUND
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