摘要:
The present invention is to provide a process for efficiently producing an optically active alcohol including (R)-3-hydroxy-3-phenylpropanenitrile. One of the features of the present invention is a polypeptide having an activity of asymmetrically reducing 3-oxo-3-phenylpropanenitrile isolated from a microorganism belonging to the genus Candida to produce (R)-3-hydroxy-3-phenylpropanenitrile, DNA encoding the polypeptide and a transformant of producing the polypeptide. Another feature of the present invention is a process for producing an optically active alcohol such as (R)-3-hydroxy-3-phenylpropanenitrile by reducing a carbonyl compound such as 3-oxo-3-phenylpropanenitrile by use of the polypeptide or the transformant.
摘要:
The present invention relates to a method for producing an L-amino acid by reacting an enantiomeric mixture of an N-succinyl amino acid with L-succinylase in the presence of N-acylamino acid racemase to specifically hydrolyze the L-form. In particular, the present invention relates to a method for producing an L-amino acid in high yield by using an N-succinyl amino acid whose dissolved concentration is particularly low as a raw material to perform a reaction while precipitating the produced L-amino acid out of the reaction system. The present invention enables efficient production of an L-amino acid having high optical purity, particularly an L-amino acid useful as a raw material for products such as pharmaceutical products and agricultural chemicals.
摘要:
The present invention has its object to provide a novel (S,S)-butanediol dehydrogenase. The present invention also has its object to provide a gene coding for the enzyme protein, a vector containing the gene, a transformant harboring the vector, and a method of producing an optically active alcohol using the transformant. The polypeptide according to one embodiment of the present invention has the physicochemical properties including actions such as: acting on (2S,3S)-2,3-butanediol to form (S)-acetoin in the presence of NAD+ as a coenzyme; and reducing 2,3-butanedione to form (2S,3S)-2,3-butanediol in the presence of NADH as a coenzyme.
摘要:
The present invention provides a method enabling convenient production of an optically active secondary alcohol useful as a pharmaceutical intermediate, particularly an optically active 1,2-diol and an optically active 2-alkanol, from an enantiomer mixture thereof. An oxidizing enzyme source having the capability of selectively oxidizing one enantiomer of secondary alcohol is allowed to act on an enantiomer mixture of secondary alcohol in the presence of a reducing enzyme source having the capability of reverse enantio-selectively reducing a ketone derivative, to convert the enantiomer mixture into a substantially single enantiomer at a theoretical percent recovery of 100%, whereby an optically active secondary alcohol is produced.
摘要:
The present invention is to provide a process for simply producing an optically active 3-hydroxypropionic ester derivative useful as a medicament intermediate from an inexpensive material. More specifically, the present invention is directed to a process for producing an optically active 3-hydroxypropionic ester derivative comprising reacting an acetic ester derivative available at low cost with abase and a formic ester, thereby converting the acetic ester derivative into a 2-formylacetic ester derivative, and thereafter, stereospecifically reducing the formyl group of the derivative by use of an enzymatic source capable of stereoselectively reducing the formyl group of the derivative.
摘要:
A process for efficiently preparing an optically active chloropropanediol derivative, especially (S)-1-benzyloxy-3-chloro-2-propanol, which has a high optical purity and is useful as an intermediate for medicines. The process comprises treating an inexpensive racemic chloropropanediol derivative with a nitroxyl compound and an oxidizing agent to convert it into a chlorohydroxyacetone derivative and then stereospecifically reducing the carbonyl group of the chlorohydroxyacetone derivative by the action of either a carbonyl-reducing enzyme having the ability to stereospecifically reduce the chlorohydroxyacetone derivative or an optically treated culture of a microorganism having the ability to yield the carbonyl-reducing enzyme. Thus, an optically active chloropropanediol derivative is prepared.
摘要:
The objective of the present invention is to provide a method for cultivating an alga having ability to produce alginic acid industrially and effectively and a method for producing an alginic acid-containing composition industrially advantageously. The method for cultivating an alga according to the present invention is characterized in comprising the step of cultivating the alga heterotrophically, wherein the alga belongs to the genus Parachlorella and has ability to produce alginic acid.
摘要:
The present invention has its object to provide a novel polypeptide having amidase activity to selectively hydrolyze S-enantiomer in racemic nipecotamide, a DNA encoding the polypeptide, a vector containing the DNA, a transformant transformed with the vector, and a method for producing an optically active carboxylic acid amide and an optically active carboxylic acid in which a racemic carboxylic acid amide is hydrolyzed with the polypeptide or the transformant.
摘要:
The present invention is to provide a process for efficiently producing an optically active alcohol including (R)-3-hydroxy-3-phenylpropanenitrile. One of the features of the present invention is a polypeptide having an activity of asymmetrically reducing 3-oxo-3-phenylpropanenitrile isolated from a microorganism belonging to the genus Candida to produce (R)-3-hydroxy-3-phenylpropanenitrile, DNA encoding the polypeptide and a transformant of producing the polypeptide. Another feature of the present invention is a process for producing an optically active alcohol such as (R)-3-hydroxy-3-phenylpropanenitrile by reducing a carbonyl compound such as 3-oxo-3-phenylpropanenitrile by use of the polypeptide or the transformant.
摘要:
An objective of the present application is to provide an industrially practicable method for producing an optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof from an inexpensive easily-available starting material. The derivative or salt thereof is useful as an intermediate for a medicine. It is also intended by the present application to provide a useful intermediate of the derivative. The objective is attained by the following method. First, an easily-available 2-halo-3-oxopropionic acid derivative is asymmetrically reduced, and then epoxidated to produce an optically-active epoxycarboxylic acid derivative. Next, the derivative is converted into an optically-active epoxyamide derivative by reaction with cyclopropylamine, and then reacted with a nitrile to obtain an optically-active oxazolinamide derivative. Subsequently, selective acid solvolysis of the oxazoline skeleton gives the optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof.