The present invention relates to a method for the identification of one or more genes of a parent microbial strain capable of producing a β-lactam compound and to mutant microbial strains in which the identified genes have been the functionally inactivated which results an at least 10% higher concentration of the total β-lactam compounds in the culture medium compared to the parent microbial strain and/or an at least 10% higher concentration of the desired β-lactam compound in the culture medium compared to the parent microbial strain; and/or an at least 10% improved yield (β-lactam / consumed sugar); and/or an at least 5% improved yield in desired β-lactam compound compared to undesired/total beta-lactam compound; and/or an at least 10% decreased consumption of side-chain precursor
本发明涉及一种鉴定母本微
生物菌株中能够产生β-内酰胺化合物的一个或多个
基因的方法,以及鉴定出的
基因功能失活的突变微
生物菌株,其结果是与母本微
生物菌株相比,
培养基中总β-内酰胺化合物的浓度至少提高10%,和/或与母本微
生物菌株相比,
培养基中所需的β-内酰胺化合物的浓度至少提高10%;和/或产量(β-内酰胺/消耗的糖)至少提高 10%;和/或所需的β-内酰胺化合物的产量比不需要的/总的β-内酰胺化合物至少提高 5%;和/或侧链前体的消耗量至少减少 10