申请人:Hayashi Mikiro
公开号:US20120329106A1
公开(公告)日:2012-12-27
Provided is a novel process for producing an L-amino acid using a microorganism belonging to the genus
Escherichia
. According to the present invention, a process for producing an L-amino acid comprising; culturing a microorganism in which an activity of the protein of any of the following [1]-[3] is increased compared with that of the parent strain in a medium, producing and accumulating the L-amino acid in the medium, and recovering the L-amino acid from the medium:
[1] a protein comprising the amino acid sequence shown in SEQ ID NO: 2
[2] a protein consisting of an amino acid sequence in which one or more amino acids are deleted, substituted or added in the amino acid sequence shown in SEQ ID NO: 2, and having YeiG activity
[3] a protein consisting of an amino acid sequence having 80% or more homology to the amino acid sequence shown in SEQ ID NO: 2, and having YeiG activity.
提供了一种使用属于大肠杆菌属微生物制备L-氨基酸的新型工艺。根据本发明,提供了一种制备L-氨基酸的工艺,包括:在培养基中培养具有以下[1]-[3]中任何一种蛋白质的活性比亲代菌株增加的微生物,将L-氨基酸在培养基中产生并积累,从培养基中回收L-氨基酸:[1]包括SEQ ID NO: 2所示的氨基酸序列的蛋白质[2]由SEQ ID NO: 2所示的氨基酸序列中删除、替换或添加一个或多个氨基酸,并具有YeiG活性的蛋白质[3]由与SEQ ID NO: 2所示的氨基酸序列具有80%或更高同源性,并具有YeiG活性的氨基酸序列组成的蛋白质。