Process for producing optically active N-substituted azetidine-2-carboxylic acid compound
申请人:Sumitomo Chemical Company, Limited
公开号:EP0974670A2
公开(公告)日:2000-01-26
There is provided a process for producing an optically active N-substituted azetidine-2-carboxylic acid compound represented by the formula (2):
by contacting a corresponding N-substituted azetidine-2-carboxylic acid ester of formula (2) with an enzyme derived from a microorganism selected from Arthrobacter SC-6-98-28 strain, Arthrobacter sp. ATCC21908 strain, Chromobacterium SC-YM-1 strain, and a mutant thereof. A process is also provided for preparing an optically active azetidine-2-carboxylic acid by eliminating the N-substituent of a N-substituted azetidine-2-carboxylic acid ester of formula (2).
The present invention provides a novel gene encoding a protein having an excellent catalyst ability for producing (S)-N-substituted cyclic imino acid represented by the general formula (2) (= the (S)-cyclic imino acid (2)):
and to provide a novel method for producing the (S)-cyclic imino acid (2) by an asymmetric hydrolization of the N-substituted cyclic imino acid ester represented by the general formula (1):
in a manner of gene engineering technology utilizing the novel gene provided.
There is provided a method for sterilizing a transformed microorganism, which comprises mixing at a temperature of 25°C or more to less than 35°C a solution comprising a transformed microorganism belonging to Escherichia which comprises an introduced DNA coding for an enzyme having a thermal denaturation temperature of 50°C or higher, with at least one member selected from the group consisting of monovalent alcohols having one to three carbon atoms and acetone, in an amount of 10 to 35% by weight of the solution.
The present invention provides a novel gene encoding a protein having an excellent catalyst ability for producing (S)-N-substituted cyclic imino acid represented by the general formula (2) (=the (S)-cyclic imino acid (2)):
1
and to provide a novel method for producing the (S)-cyclic imino acid (2) by an asymmetric hydrolization of the N-substituted cyclic imino acid ester represented by the general formula (1):
2
in a manner of gene engineering technology utilizing the novel gene provided.