Stimulatory effect of bicarbonate on the glycolysis of Actinomyces viscosus and its biochemical mechanism

N. Takahashi, T. Yamada

研究成果: Article査読

19 被引用数 (Scopus)

抄録

The effects of bicarbonate on acid production by 4 human strains of Actinomyces viscosus were estimated under anaerobic conditions. The rate of acid production was accelerated by bicarbonate 3‐4‐times as much as that without bicarbonate. The analyses of intracellular glycolytic intermediates, NAD and NADH revealed a decrease in NADH:NAD ratio and an increase in the level of 3‐phosphoglycerate in the cells when bicarbonate was present. Furthermore, when bicarbonate was available, malate dehydrogenase and fumarate reductase in the succinate pathway were expected to function as NADH‐oxidizing enzymes in addition to lactate dehydrogenase. These observations indicate the efficient regeneration of NAD in the presence of bicarbonate. Thus, the stimulation of A. viscosus glycolysis by bicarbonate was thought to stem from the activation of glyceraldehyde 3‐phosphate dehydrogenase (G3PDH) by the decrease in the level of NADH, because NADH was a strong inhibitor of G3PDH in this microorganism.

本文言語English
ページ(範囲)165-170
ページ数6
ジャーナルOral Microbiology and Immunology
7
3
DOI
出版ステータスPublished - 1992 6

ASJC Scopus subject areas

  • 微生物学
  • 免疫学
  • 歯科学(全般)
  • 微生物学(医療)

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