Nitrilases, Nucleic Acids Encoding Them and Methods for Making and Using Them
申请人:Desantis Grace
公开号:US20100216214A1
公开(公告)日:2010-08-26
The invention relates to nitrilases and to nucleic acids encoding the nitrilases. In addition methods of designing new nitrilases and method of use thereof are also provided. The nitrilases have increased activity and stability at increased pH and temperature.
Process for producing optically active alpha-hydrocarboxylic acid having phenyl group
申请人:NITTO CHEMICAL INDUSTRY CO., LTD.
公开号:EP0610048A2
公开(公告)日:1994-08-10
A biological process for predominantly producing an optically active α-hydroxycarboxylic acid having a phenyl group directly from a racemic α-hydroxynitrile or a mixture of an aldehyde corresponding to the nitrile and prussic acid as a substrate is disclosed, comprising reacting a microorganism belonging to the genus Gordona with the substrate in a neutral to basic aqueous medium. A desired optically active α-hydroxycarboxylic acid having a phenyl group can be obtained quantitatively at a high optical purity.
Method of producing optically active alpha-hydroxy acid or alpha-hydroxyamide
申请人:NITTO CHEMICAL INDUSTRY CO., LTD.
公开号:EP0711836A1
公开(公告)日:1996-05-15
A reaction system, wherein a cyanohydrin is converted into an optically active α-hydroxy acid or α-hydroxyamide via a treatment in a reaction tank (f) with a microorganism, is provided with an automatic cyanohydrin controller (h) comprising a cyano ion detector (a), a regulator (b) and a cyanohydrin supplier (i) and (j) linked thereto. The reaction is performed while automatically controlling the cyanohydrin concentration.
Thus cyanohydrin can be supplied under automatic control at a relatively low and constant concentration on the basis of its consumption ratio. The reaction rate of the catalyst can be continuously regarded as the rate-limiting factor. As a result, a decrease in the enzymatic activity during the reaction can be suppressed and an optically active α-hydroxy acid or α-hydroxyamide can be efficiently obtained at a high yield.