The object of the present invention is to provide a novel dehydrogenase having a property which is different from that of known dehydrogenases. The present invention provides a dehydrogenase having the following physicochemical properties: (1) effect: to produce N-alkyl-L-alanine from pyruvic acid and alkylamine or dialkylamine using NADPH and/or NADH as coenzyme; (2) substrate specificity: to show activity to alkylamine or dialkylamine but not to ammonium; (3) optimal pH when using phenylpyruvic acid and methylamine as substrates is around 10; and (4) when treated at 30° C. for 30 minutes, the enzyme is stable at around pH 5 to 10.5.
本发明的目的是提供一种新的脱氢酶,具有不同于已知脱氢酶的特性。本发明提供一种具有以下理化特性的脱氢酶:(1)作用:使用
NADPH和/或
NADH作为辅酶,从
丙酮酸和烷基胺或二烷基胺中产生N-烷基-
L-丙氨酸;(2)底物特异性:对烷基胺或二烷基胺表现出活性,但不对
铵离子表现出活性;(3)当使用
苯丙酮酸和甲基胺作为底物时,最适pH约为10;(4)在30℃处理30分钟时,该酶在pH 5至10.5左右稳定。