High Cell Density Cultivation Process for the Expression of Botulinum Neurotoxin a Receptor Binding Domain.

ABSTRACT: The receptor-binding domain of botulinum neurotoxin (H_C fragment), is a promising botulism vaccine candidate. In the current study, fermentation strategies were evaluated to upscale H_C fragment expression. A simple translation of the growth conditions from shake flasks to a batch fermentation process resulted in limited culture growth and protein expression (OD of 11 and volumetric protein yields of 123 mg/L). Conducting fed-batch fermentation with rich media and continuous nutrient supplementation significantly improved culture growth (OD of 40.3) and protein expression (1093 mg/L). A further increase in H_C fragment yield was achieved by high cell density cultivation (HCDC). The bacterium was grown in a defined medium and with a combined bolus/continuous f

SUBMITTER: Ben David A 

PROVIDER: S-EPMC9031141 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature