摘要:
Optically active 2-hydroxy-4-phenyl-3-butenoic acid can be obtained by treating 2-oxo-4-phenyl-3-butenoic acid with an optionally treated microorganism capable of asymmetrically reducing the 2-oxo-4-phenyl-3-butenoic acid into (R)-2-hydroxy-4-phenyl-3-butenoic acid or (S)-2-hydroxy-4-phenyl-3-butenoic acid to thereby asymmetrically reduce the same into (R)-2-hydroxy-4-phenyl-3-butenoic acid or (s) -2-hydroxy-4-phenyl-3-butenoic acid.
摘要:
An optically active 2-hydroxy acid derivative is produced by treating a 2-oxo acid derivative with a microorganism, which has been optionally treated, capable of asymmetrically reducing said 2-oxo acid derivative into an optically active (R)- or (S)-2-hydroxy acid derivative represented by the formula (II) and recovering the optically active (R)- or (S)-hydroxy acid derivative thus formed. Optically active 2-hydroxy acid derivatives are important intermediates in the synthesis of various drugs such as a remedy for hypertension.
摘要:
A microorganism or a preparation thereof is permitted to act on a mixture of enantiomers of 3-phenyl-1, 3-propanediol, and the residual optically active 3-phenyl-1,3-propanediol is harvested.The genera of those microorganisms which are able to leave (R)-3-phenyl-1,3-propanediol include Candida, Hansenula, Rhodotorula, Protaminobacter, Aspergillus, Alternaria, Macrophomina, Preussia and Talaromyces.The genera of those microorganisms which are able to leave (S)-3-phenyl-1,3-propanediol include Candida, Geotrichum, Leucosporidium, Pichia, Torulaspora, Trichosporon, Escherichia, Micrococcus, Corynebacterium, Gordona, Rhodococcus, Aspergillus, Emericella, Absidia, Fusarium, Dactylium, Serratia and Pseudomonas.
摘要:
Optically active 1,3-butanediol can be obtained by treating an enantiomorphic mixture of 1,3-butanediol with a microorganism or cells thereof which have been ground, acetone-treated, or lyophilized, capable of acting on an enantiomorphic mixture of 1,3-butanediol so as to leave (R)- or (S)-1,3-butanediol as such.Further, optically active 1,3-butanediol can be obtained by treating 4-hydroxy-2-butanone with a microorganism or cells thereof which have been ground, acetone-treated, or lyophilized, capable of asymmetrically reducing the 4-hydroxy-2-butanone into (R)- or (S)-1,3-butanediol.
摘要:
Optically active 1,3-BUTANEDIOL is produced by contacting microorganisms selected from respective groups of specific genuses having an effect of acting on an enantiomeric mixture of 1,3-butanediols and leaving (R)-1,3-butanediol or (S)-1,3-butanediol in enantiomeric mixture, and collecting the remaining optically active (R)-1,3-butandiol or (S)-1,3-butanediol. Optically active 1,3-butanediol can be produced by an economically excellent and convenient means.
摘要:
Riboflavin is effectively obtained by culturing in a medium (1) a purine-requiring revertant derived from a riboflavin-producing yeast which belongs to the genus Saccharomyces and has a purine requirement or (2) a riboflavin-producing yeast which belongs to the genus Saccharomyces and is resistant to ammonium ion, and collecting the produced riboflavin.
摘要:
An objective of the present invention is to provide a nitrile hydratase capable of producing 2-hydroxy-4-methylthiobutyroamide. The present invention provides a novel nitrile hydratase producing α-hydroxyamide using, α-hydroxnitrile as the substrate, and the encoding DNA thereof. The enzyme can be obtained from Rhodococcus sp. Further, the enzymatic activity of the enzyme can he maintained stably during the reaction. The present invention provides a method for producing amide compounds, the method comprising the step of reacting this enzyme to nitrile compounds. According to the present invention, from hydroxy nitrile compounds, corresponding amide compounds can be produced biochemically without reducing the enzyme activity of nitrile hydratase.
摘要:
D-aminoacylase derived from fungi is provided. The fungi capable of producing D-aminoacylase include those belonging to the genus Hypomyces, Fusarium, Auricularia, Pythium, and Menisporopsis. The fungal D-aminoacylase is useful for efficiently producing D-amino acids from N-acetyl-D-amino acids.
摘要:
A nitrile compound having a complicated structure (e.g., 2-hydroxy-4-methylthiobutyronitrile) is converted into an amide compound with high production efficiency, by using a novel microorganism of which the gene 16S rRNA has a specific base sequence. As the microorganism, Rhodococcus sp. Cr4 strain and Rhodococcus sp. Am8 strain or the like is employed.
摘要:
A method for racemizing with N-acylamino acid racemase (NAAR) derived from Sebekia benihana and a method for producing optically active amino acids using the racemaization method are provided. The racemase of the present invention can efficiently catalyze the racemization of acylamino acid substrates including N-acylalanine, N-acylaspartic acid, N-acylleucine, and N-acylvaline. Furthermore, this method can be applied to efficient production of optically active amino acids, which are useful, for example, as medicinal raw materials.