Abstract
Regulatory systems that recognize and response to oxygen and reactive oxygen species are essential for the survival of bacteria in air. Various sensing systems have been reported in bacteria, and findings of these sensing systems have provided the concept that how organisms recognize these molecules. Although oxygen sensing mechanisms have been studied in aerobic bacteria, recent studies have shown that the presence of sensing systems in anaerobic bacteria. Lactic acid bacteria (LAB) are used industrially for their fermentation properties, and as such, have been generally regarded as anaerobic bacteria. However, recent studies have shown that LAB has unique oxygen metabolisms and adaptation mechanisms to oxygen rich environments. This manuscript presents an overview of oxygen sensing mechanisms in bacteria and recent advances in LAB.
