Integrative growth physiology and transcriptome profiling of probiotic KUB-AC5.

KUB-AC5 has been widely used as probiotic in chicken for reduction. However, a preferable carbon source and growth phase is poorly characterized underlying metabolic responses on growth and inhibition effects of KUB-AC5. This study therefore aimed to investigate transcriptome profiling of KUB-AC5 revealing global metabolic responses when alteration of carbon sources and growth phases. Interestingly, KUB-AC5 grown under sucrose culture showed to be the best for fast growth and inhibition effects against Enteritidis S003 growth. Towards the transcriptome profiling and reporter proteins/metabolites analysis, the results showed that amino acid transport ABC systems as well as sucrose metabolism and transport are key metabolic responses at Logarithmic (L)-phase of KUB-AC5 growth. Considering the Stationary (S)-phase, we found the potential reporter proteins/metabolites involved in carbohydrate metabolism ., levansucrase and levan. Promisingly, levansucrase and levan were revealed to be candidates in relation to inhibition effects of KUB-AC5. Throughout this study, KUB-AC5 had a metabolic control in acclimatization to sucrose and energy pools through transcriptional co-regulation, which supported the cell growth and inhibition potentials. This study offers a perspective in optimizing fermentation condition through either genetic or physiological approaches for enhancing probiotic KUB-AC5 properties.