Metabolic Engineering of Antibiotic-Producing Actinomycetes Using In Vitro Transposon Mutagenesis
A program of mutation and screening, with stepwise reverse engineering or “decoding” of the improved strain, is a way to better understand the genetics and physiology of the strain improvement process. As more is learned about the genetics of strain improvement, it is hoped that more fundamental principles will emerge about the types of mutations and genetic manipulations that reliably lead to higher producing strains. This will accelerate the construction of higher producing strains by metabolic engineering in the future. In this chapter, a detailed tagged mutagenesis approach is described using in vitro transposon mutagenesis which allowed the successful identification of key genes involved in macrolide (erythromycin) antibiotic biosynthesis.
Key wordsIn vitro transposon mutagenesis Reverse engineering Actinomycete Protoplast transformation Erythromycin Aeromicrobium erythreum Microtiter fermentation
This work was supported by The National Institutes of Health, Small Business Innovation Research (SBIR) awards R44GM58943 and R44GM063278.
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