Streptococcus mutans metal ion availability and local microenvironment pH

Streptococcus mutans metal ion availability and local microenvironment pH refers to the physiological mechanisms and environmental conditions that govern the survival and virulence of the primary dental caries pathogen. S. mutans thrives by fermenting dietary carbohydrates into organic acids, which lowers the local pH and leads to the demineralization of tooth enamel [1]. To survive this self-imposed acid stress, the bacterium employs an F-ATPase proton pump and various alkali-producing pathways to maintain intracellular pH homeostasis [2]. Simultaneously, the availability of essential metal ions like manganese, iron, and zinc is strictly regulated, as these ions serve as vital cofactors for enzymes involved in metabolism and oxidative stress protection, such as superoxide dismutase [3]. Therapeutic interventions, such as fluoride and certain metal chelators, aim to disrupt these homeostatic processes by inhibiting glycolytic enzymes or sequestering necessary metals [4]. Consequently, targeting the metabolic and homeostatic adaptations of S. mutans remains a cornerstone of preventative dentistry and oral health research. [1] Lemos JA, et al. (2019). The Biology of Streptococcus mutans. Microbiol Spectr. [2] Quivey RG, et al. (2001). Acid adaptation in Streptococcus mutans. Gene. [3] Spatafora G, et al. (2015). The SloR metalloregulator in Streptococcus mutans. Mol Oral Microbiol. [4] Marquis RE. (1995). Antimicrobial actions of fluoride for oral bacteria. Can J Microbiol.

Other names

S. mutans metal homeostasisS. mutans aciduricityDental plaque microenvironmentS. mutans acid stress response

Inhibition of glycolytic enzymes (e.g., enolase), disruption of the F-ATPase proton pump, and sequestration of essential metal cofactors required for bacterial enzyme function.