A new (R)-hydroxynitrile lyase from Prunus mume: asymmetric synthesis of cyanohydrins
作者:Samik Nanda、Yasuo Kato、Yasuhisa Asano
DOI:10.1016/j.tet.2005.08.105
日期:2005.11
A new hydroxynitrile lyase (HNL) was isolated from the seed of Japanese apricot (Prunus mume). The enzyme has similar properties with HNL isolated from other Prunus species and is FAD containing enzyme. It accepts a large number of unnatural substrates (benzaldehyde and its variant) for the addition of HCN to produce the corresponding cyanohydrins in excellent optical and chemical yields. A new HPLC
Cytochrome P450
II
dependent monooxygenases and DNA molecules encoding these monooxygenases are provided, which are able to catalyze the biosynthethic conversion of aldoximes to nitrils and the conversion of said nitrils to the corresponding cyanohydrins, which are the presursors of cyanogenic glycosides. Moreover, the invention provides methods for obtaining DNA molecules according to the invention and methods for obtaining transgenic plants resistant to insects, acarids, or nematodes or plants with improved nutritive value.
Linear bisphenol epoxy polymers containing cyano groups
申请人:The Dow Chemical Company
公开号:US04837293A1
公开(公告)日:1989-06-06
Cyanobisphenols of the formula: ##STR1## and their diglycidyl ethers may form linear thermoplastic polymers with low oxygen permeability and which contain cyano moieties that may subsequently be reacted to form useful active sites on the polymer.
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.
申请人:UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC.
公开号:US20160244769A1
公开(公告)日:2016-08-25
The present invention provides cells that are metabolically engineered for formation and accumulation of a hexose or other glucose-6P or fructose-6P metabolite, as well methods for making said cells and methods for forming and isolating the hexose or other metabolite.