Mining and fine-tuning sugar uptake system for titer improvement of milbemycins in Streptomyces bingchenggensis.

ABSTRACT: Dramatic decrease of sugar uptake is a general phenomenon in Streptomyces at stationary phase, when antibiotics are extensively produced. Milbemycins produced by Streptomyces bingchenggensis are a group of valuable macrolide biopesticides, while the low yield and titer impede their broad applications in agricultural field. Considering that inadequate sugar uptake generally hinders titer improvement of desired products, we mined the underlying sugar uptake systems and fine-tuned their expression in this work. First, we screened the candidates at both genomic and transcriptomic level in S. bingchenggensis. Then, two ATP-binding cassette transporters named TP2 and TP5 were characterized to improve milbemycin titer and yield significantly. Next, the appropriate native temp

SUBMITTER: Jin P 

PROVIDER: S-EPMC7360889 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature