Abstract:
The present invention relates to a method for producing 3-O-glucoside-7-O-rhamnoside made in plants using Escherichia coli, and more specifically, to metabolic-adjusted Escherichia coli and synthesis of quercetin 3-O-glucoside-7-O-rhamnoside using the same.
Abstract:
PURPOSE: A composition containing novel chalcone compound pyrazolylnaphthalenol derivatives for preventing and treating cardiovascular diseases is provided to suppress MAO-A(monoamine oxidase)-A. CONSTITUTION: A novel chalcone compound pyrazoylynaphthalenol derivative is denoted by chemical formula 1. The derivative is 1-(1-(4-fluorophenyl)-5-(4-methoxyphenyl)-4,5-dihydro-1H-pyrazol-3-yl)naphthalen-2-ol. The derivative suppresses MAO-A. A method for preparing the derivative comprises: a step of reacting 2-hydroxy-1-acetonaphthone and 4-trimethoxybenzaldehyde under the presence of a base to prepare a chalcone compound, 4,5-benzo-1-hydroxy-4`-methoxycalcone; and a step of reacting the chalcone compounds with 4-fluorophenylhydrazine to prepare pyrazoylylnaphthalenol derivative 1-(4-fluorophenyl)-5-(4-methoxyphenyl)-4,5-dehydro-1H-pyrazole-3-yl-naphthalene-2-ol. A pharmaceutical composition for preventing and treating cardiovascular diseases contains the derivative or a pharmaceutically acceptable salt thereof as an active ingredient.
Abstract:
PURPOSE: A gene producing quercetin 3-O-N-cetyl glucosamine and a method thereof are provided to be applied to various food or pharmaceutical products. CONSTITUTION: A quercetin-3-O-N-acetyl glucosamine compound is a conjugate of quercetin and N-acetytl glucosamine. A gene mediating quercetin and N-acetyl glucosamine has a base sequence of sequence number 1. A method for preparing the compound comprises: a step of preparing an expression vector containing the gene; a step of transforming the expression vector to a host cell; a step of adding quercetin to the host cell.
Abstract:
PURPOSE: A method for producing isorhamnetin-3-O-glucoside using mutant of glycosyltransferase is provided to ensure response in isorhamnetin. CONSTITUTION: A mutant of glycosyltransferase has an amino acid sequence of sequence number 1. The mutant of the glycosyltransferase is specific to isorhamnetin. The mutant of the glycosyltransferase is cloned in a poplar. A gene of glycosyltransferase encoding the mutant of glycosyltransferase has a base sequence of sequence number 2. The mutant of glycosyltransferase is prepared using a strain transformed by a recombinant expression vector containing the gene. The isorhamnetin-3-O-glucoside is prepared using the mutant.
Abstract:
PURPOSE: A novel Arthrobacter sp. strain and an agricultural microorganism formulation containing the same are provided to ensure antibacterial activity and to prevent tomato gray mold. CONSTITUTION: An Arthrobacter oxidans strain has an effect of preventing Botrytis cinerea. The strain is Arthrobacter sp. Ahn005(KACC91402). A composition for preventing or treating tomato gray mold contains the Arthrobacter sp. Ahn005(KACC91402) and agriculturally acceptable carrier.
Abstract:
PURPOSE: A novel strain and a microorganism formulation containing the same are provided to prevent ecosystem damage and potato or tomato late blight. CONSTITUTION: An Arthrobacter oxidans strain has an effect of preventing Phytophthora infestans. The strain is Arthrobacter Ahn004(KACC91401) which is isolated from domestic fermented seafood. A composition for preventing or treating tomato or potato late blight contains Arthrobacter Ahn004(KACC91401) strain and agriculturally acceptable carrier.
Abstract:
PURPOSE: A novel Arthrobacter sp. novel strain and nematocide composition containing the same are provided to use as a nematidical agent. CONSTITUTION: An Arthrobacter sp. novel strain has an effect of killing C. elegance. Arthrobacter sp. strain is Arthrobacter Ahn008 KACC91405. The novel strain is isolated from soil and growth temperature is 20-45°C. A nematocide composition contains 0.001-10 weight% of Arthrbacter sp. Ahn008 KACC91405 or culture medium thereof. The composition further contains Ph-adjustable additive, surfactant, emulsifier, chelating agent, salt, corrosion inhibiting agent, dye, perfume, and dispersing agent.
Abstract:
본 발명은 식물로부터 유래한 메틸전이효소들 (o-methyltransferases), 그들의 유전자, 상기 메틸전이효소를 생산하는 재조합 발현 벡터들 및 형질전환 미생물들, 이들을 이용한 메틸전이효소의 제조방법 그리고 이들을 이용한 다중 메틸화 (multiple methylation)된 대사산물의 생산방법에 관한 것이다. 보다 상세하게는, 본 발명은 벼와 콩으로부터 각각 분리한 서로 선택성이 다른 메틸전이효소들, 그들의 유전자, 상기 메틸전이효소 유전자들을 하나 이상 포함하는 재조합 발현 벡터들, 이로 형질전환 된 대장균들, 이들을 이용한 메틸전이효소의 제조방법 및 상기 메틸전이효소들을 다중 발현하는 미생물을 이용한 어마닌 (ermanin; 5,7-dihydroxy-3,4-dimethylflavone)의 대량 생산방법에 관한 것으로서, 본 발명의 메틸전이효소의 제조방법은 유용하지만 화학적 합성이 매우 어려운 대사산물을 생물전환 반응으로 통해 보다 용이하게 적은 비용으로 대량 생산할 수 있으므로 새로운 의약품 개발에 널리 사용될 수 있다. 메틸전이효소, 재조합 발현 벡터들, 다중 메틸화, 어마닌, 켐퍼롤