Insights into the roles of exogenous phenylalanine and tyrosine in improving rapamycin production of Streptomyces rapamycinicus with transcriptome analysis.

Rapamycin is an important natural macrolide antibiotic with antifungal, immunosuppressive and antitumor activities produced by Streptomyces rapamycinicus. However, their prospective applications are limited by low fermentation units. In this study, we found that the exogenous aromatic amino acids phenylalanine and tyrosine could effectively increase the yield of rapamycin in industrial microbial fermentation.