Abstract
This study evaluated the feasibility of applying a microalgal peptide-enriched extract, obtained through a sequential alkaline and enzymatic method, as a fundamental media component in Escherichia coli culture. The results demonstrated that the extract is viable as the primary nutrient source for E. coli cultures (wild type), even as a complete substitute for the widely used Luria–Bertani (LB) medium, using an extract dilution of 1:3. Its application in a proportion carbon limiting (dilution 1:7), with glycerol supplementation at the early stationary phase, improved the nutrient use efficiency and controlled the undesirable acetate production. Furthermore, this last strategy applied in an E. coli mutant (M4-ΔiclR) enhanced the production of succinate by 67.3% compared with the M9 medium. The innovative approach proposed in this study opens a wide range of applications and studies related to the production of bio-compounds through diverse microorganisms.
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