Difference in the xylitol sensitivity of acid production among Streptococcus mutans strains, and its biochemical mechanism

H. Miyasawa-Hori, S. Aizawa, N. Takahashi

Research output: Contribution to journalReview articlepeer-review

Abstract

Although xylitol inhibits the glycolysis of Streptococcus mutans, the degree of inhibition is known to vary among strains. Thus, we studied the biochemical mechanism by which the inhibition varies, using three strains of S. mutans characterized as highly sensitive, moderately sensitive, and resistant to xylitol. The inhibitory effect of xylitol was investigated by measurement of the acid production rate, the metabolic intermediates and the activities of phosphoenolpyruvate phosphotransferase system (PEP-PTS). The results indicate that the higher xylitol: PEP-PTS activity the strain had and the more effectively xylitol inhibited its glucose: PEP-PTS activity, the more sensitive to xylitol the strain was. These observations suggest the following inhibitory mechanisms: (1) direct inhibition of glycolytic enzymes by intracellular accumulation of xylitol 5-phosphate derived from xylitol: PEP-PTS and (2) indirect inhibition through competition for a phosphoryl donor between glucose: and xylitol: PEP-PTS.

Original languageEnglish
Pages (from-to)187-188
Number of pages2
JournalInternational Congress Series
Volume1284
DOIs
Publication statusPublished - 2005 Sep

Keywords

  • Acid production
  • Phosphoenolpyruvate phosphotransferase system
  • Streptococcus mutans
  • Xylitol

ASJC Scopus subject areas

  • Medicine(all)

Fingerprint Dive into the research topics of 'Difference in the xylitol sensitivity of acid production among Streptococcus mutans strains, and its biochemical mechanism'. Together they form a unique fingerprint.

Cite this