The invention provides DNA coding for cytochrome P450 monooxygenases of the CYP79 family catalyzing the conversion of an aliphatic or aromatic amino acid or chain-elongated methionine homologue to the corresponding oxime. Preferred embodiments of the invention are enzymes catalyzing the conversion of L-Valine and L-Isoleucine such as the cassava enzymes CYP79D1 and CYP79D2, enzymes catalyzing the conversion of tyrosine such as the
Triglochin maritima
enzymes CYP79E1 and CYP79E2, enzymes catalyzing the conversion of tryptophan to the corresponding oxime indole-3-acetaldoxime such as the
Arabidopsis thaliana
enzyme CYP79A2 and the
Brassica napus
enzyme CYP79B5, and enzymes catalyzing the conversion of a chain-elongated methionine homologue such as the
Arabidopsis thaliana
enzymes CYP79F1 and CYP79F2. Transgenic expression of said DNA or parts thereof in plants can be used to manipulate the biosynthesis of corresponding glucosinolates or cyanogenic glucosides.
该发明提供了编码CYP79家族细胞色素P450单加氧酶的DNA,其催化将脂肪族或芳香族
氨基酸或链延长的蛋
氨酸同源物转化为相应的
肟类。该发明的优选实施例是催化
L-缬氨酸和
L-异亮氨酸转化的酶,例如木薯酶CYP79D1和CYP79D2,催化
酪氨酸转化的Triglochin maritima酶CYP79E1和CYP79E2,催化色
氨酸转化为相应的
肟类
吲哚-3-乙醛肟的Arabidopsis thaliana酶CYP79A2和Brassica napus酶CYP79B5,以及催化链延长的蛋
氨酸同源物转化的Arabidopsis thaliana酶CYP79F1和CYP79F2。在植物中转
基因表达该DNA或其部分可以用于操纵相应的
硫代
葡萄糖苷或
氰基
葡萄糖苷的
生物合成。