摘要:
A process for efficiently producing optically active amino compounds, mainly (R)-amino compounds, at a low cost by means of a microbial enzyme; a polypeptide suitable for use in the production process and having a stereoselective transaminase activity; and a DNA coding for the polypeptide. The process is characterized by comprising causing a transaminase to act on a ketone compound as an amino acceptor in the presence of a primary amine as an amino donor to stereoselectively transfer the amino group to thus obtain an optically active amino compound. The DNA contains a base sequence coding for a polypeptide having a stereoselective transaminase activity. The polypeptide can be obtained by incubating a microorganism belonging to the genus Arthrobacter.
摘要:
A process for producing optically active (R)-amino compounds which comprises treating an aralkyl alkyl ketone compound (the amino receptor) coexisting with a racemic or (R)-amino compound (the amino donor) with an (R)-specific transaminase produced by a microorganism belonging to the genus Arthrobacter and thus effecting stereoselective transamination. This process makes it possible to facilitate the production in a high yield of optically active (R)-amino compounds, etc., having aryl, etc. at the 1-position which have been difficult to synthesize by the conventional techniques.
摘要:
A process for producing optically active (R)-amino compounds which comprises treating an aralkyl alkyl ketone compound (the amino receptor) coexisting with a racemic or (R)-amino compound (the amino donor) with an (R)-specific transaminase produced by a microorganism belonging to the genus Arthrobacter and thus effecting stereoselective transamination. This process makes it possible to facilitate the production in a high yield of optically active (R)-amino compounds, etc., having aryl, etc. at the 1-position which have been difficult to synthesize by the conventional techniques.
摘要:
A novel polypeptide capable of forming tert-butyl (3R,5S)-6-chloro-3,5-dihydroxyhexanoate; and a polynucleotide encoding the same. Namely, a polypeptide which has an enzymatic activity of assymetrically reducing tert-butyl (S)-6-chloro-5-hydroxy-3-oxohexanoate to give tert-butyl (3R,5S)-6-chloro-3,5-dihydroxyhexanoate and contains the amino acid sequence represented by SEQ ID NO:1 in Sequence Listing or an amino acid sequence derived from the above amino acid sequence by the substitution, insertion, deletion or addition of at lease one amino acid.
摘要:
This invention provides a process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl] acetic acid derivatives, which are of value as intermediates of drugs, from inexpensive starting materials without using any special equipment such as that required for super-low temperature reactions. A process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivatives which comprises
reacting an acetic acid derivative at a temperature of not less than -30°C with an enolate prepared by permitting either a base or a metal having a valency of 0 to act on the derivative to produce a hydroxyoxohexanoic acid derivative, reducing this compound with the aid of a strain of microorganism to provide a halomethyldioxanylacetic acid derivative, treating this compound with an acetalizing agent in the presence of an acid catalyst to provide a halomethyldioxanylacetic acid derivative, reacted with an acyloxylating agent to provide a acyloxymethyldioxanylacetic acid derivative, and subjecting this compound to solvolysis in the presence of a base.
摘要:
An enzyme capable of converting a ketone compound into an optically active amino compound via a transamination reaction and a process for producing an optically active amino compound by using this enzyme. (S)- alpha -Phenethylamine:pyruvate transaminase which acts on (S)- alpha -phenethylamine and a ketone compound and catalyzes a transamination reaction whereby acetophenone and an amino compound corresponding to the ketone compound are formed; a process for producing an optically active amino compound by using the transaminase; and a method for culturing a microorganism producing the above transaminase wherein at least one inducer selected from the group consisting of propylamine, 1-butylamine, 2-butylamine, 2-pentylamine, isopropylamine and isobutylamine is added to the medium in culturing the transaminase-producing microorganism.
摘要:
A novel polypeptide for producing tert-butyl (3R,5S)-6-chloro-3,5-dihydroxyhexanoate, a gene encoding the polypeptide, and a method of using the polypeptide, are provided. The polypeptide has an enzyme activity to asymmetrically reduce tert-butyl (S)-6-chloro-5-hydroxy-3-oxohexanoate to tert-butyl (3R,5S)-6-chloro-3,5-dihydroxyhexanoate. The polypeptide comprises the amino acid sequence represented by SEQ ID NO. 1 in the Sequence Listing, or the amino acid sequence having at least one amino acid substitution, insertion, deletion, or addition thereof.
摘要翻译:提供了一种用于制备(3R,5S)-6-氯-3,5-二羟基己酸叔丁酯,编码该多肽的基因以及使用该多肽的方法的新型多肽。 该多肽具有不对称地将(S)-6-氯-5-羟基-3-氧代己酸叔丁酯还原成(3R,5S)-6-氯-3,5-二羟基己酸叔丁酯的酶活性。 多肽包含SEQ ID NO:1所示的氨基酸序列。 或者具有至少一个氨基酸取代,插入,缺失或添加的氨基酸序列。
摘要:
Relating to an enzyme capable of efficiently converting a ketone compound to an optically active amino compound by transamination, and a process for preparing an optically active amino compound using the enzyme. An (S)-α-phenethylamine : pyruvate transaminase, which acts on (S)-α-phenethylamine and a ketone compound, thereby catalyzing transamination for forming acetophenone and an amino compound corresponding to the ketone compound; a process for preparing an optically active amino compound using the transaminase; and a method for culturing a microorganism for producing the above transaminase, comprising adding to a medium one or more compounds selected from the group consisting of propylamine, 1-butylamine, 2-butylamine, 2-pentylamine, isopropylamine and isobutylamine as an inducer for the enzyme when a microorganism for producing (S)-α-phenethylamine : pyruvate transaminase is cultured.
摘要:
A process for efficiently producing optically active amino compounds, mainly (R)-amino compounds, at a low cost by means of a microbial enzyme; a polypeptide suitable for use in the production process and having a stereoselective transaminase activity; and a DNA coding for the polypeptide. The process is characterized by comprising causing a transaminase to act on a ketone compound as an amino acceptor in the presence of a primary amine as an amino donor to stereoselectively transfer the amino group to thus obtain an optically active amino compound. The DNA contains a base sequence coding for a polypeptide having a stereoselective transaminase activity. The polypeptide can be obtained by incubating a microorganism belonging to the genus Arthrobacter .