Strain mass-producing Epsilon-poly-L-lysine, a method for using its strain and a method for producing Epsilon-poly-L-lysine
申请人:Chisso Corporation
公开号:EP0256423A2
公开(公告)日:1988-02-24
The present invention provides variant strains mass-producing εPL which are obtained by variant treatment of a strain producing εPL. For using the variant strains, the strains are cultured in a cultivated medium, εPL is mass-produced and stored in the culture solution, and the stored εPL is collected from the solution. For producing εPL, a strain which produces εPL is variant-treated, the obtained variant strain is cultivated in a culture medium to which L-lysine or L-lysine and one or more sugars are added, εPL is mass-produced and stored in the culture solution, and the stored εPL is collected from the solution.
The variant strains producing εPL in large quantities are preferably the strains which have tolerance to an analogue of L-lysine of Streptomyces albulus subsp. lysinopolymerus No.346-D strain and plasmid-amplifiable variant strains of the same bacteria.
本发明提供了大量产生εPL 的变异菌株,这些菌株是通过对产生εPL 的菌株进行变异处理而获得的。使用变异菌株时,在培养基中培养菌株,大量生产εPL 并将其储存在培养液中,然后从培养液中收集储存的εPL。为了产生εPL,对产生εPL的菌株进行变异处理,在加入 L-赖氨酸或 L-赖氨酸和一种或多种糖的培养基中培养获得的变异菌株,大量生产εPL并将其储存在培养液中,然后从培养液中收集储存的εPL。
大量生产 εPL 的变异菌株最好是对白链霉菌亚种赖氨酸类似物有耐受性的菌株,以及同一细菌中可进行质粒扩增的变异菌株。