申请人:TRANSGENE S.A.
公开号:EP0379428A1
公开(公告)日:1990-07-25
The present invention relates to a method for the selection of organisms derepressed in the expression of primary or secondary metabolites, starting with a parent strain of this normally repressed organism, wherein:
- said parent strain is transformed with a plasmid carrying a marker gene under the control of the DNA sequence involved in the regulation of the expression of said metabolite,
- the strains thus transformed are subjected to a mutagenic treatment, and
- the positive strains expressing said marker in the presence of said metabolite at a concentration totally repressing the expression of said marker in the transformed parent strain are selected,
- from among these positive strains, the strains hyperproductive of metabolite are selected, optionally after they have been relieved of their plasmids.
本发明涉及一种选择初级或次级代谢产物表达受抑制的生物的方法,该方法从这种正常受抑制生物的亲本菌株开始,其中:
- 用携带标记基因的质粒转化所述亲本菌株,该标记基因受参与调节所述代谢物表达的 DNA 序列控制、
- 对这样转化的菌株进行诱变处理,以及
- 筛选出在完全抑制转化亲本菌株中所述标记表达的浓度的所述代谢物存在时表达所述标记的阳性菌株、
- 从这些阳性菌株中挑选出对代谢物具有高生产率的菌株,也可选择在去除质粒后进行挑选。