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KMID : 0370220050490020122
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Yakhak Hoeji
2005 Volume.49 No. 2 p.122 ~ p.127
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Inhibitory Effect of Metabolites isolated from Streptococcus mutas sp. M-20 on Glucosyltransferase Activity from Streptococcus mutas
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서은정/Suh EJ
우영아/김효진/Woo YA/Kim HJ
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Abstract
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Dental caries is one of the most common oral diseases in the world. Glucosyltransferase (Gtase) of Streptococcus mutans (S. mutans) plays an important role in the development of dental caries. For the purpose to develop anti- caries, we examined the effect of metabolites isolated from Streptomyces sp. M-20 on Gtase and the growth of S. mutans. Streptomyces sp. M-20 isolated from Mongolian soil showed 95~96% sequence homology with that of Streptomyces lin- colnensis. The metabolites of Streptomyces sp. M-20 were partially purified by extraction with ethyl acetate, silica gel column chromatography and preparative TLC. Partially purified metabolite, red colored component (MR-20) in ethyl acetate fraction showed potent antibacterial activitiy against S. mutans and inhibitory activity against Gtase purified from S. mutans, while another isolated yellow component (MY-20) showed no activity against S. mutans. The inhibitory activity of MR-20 against Gtase was confirmed by activity staining on SDS-polyacrylamide gel electrophoresis. The concentration of MR-20 for 50% inhibition (IC50) against Gtase activity was 60㎍/㎖. These results suggest that MR-20 can be developed for antibacterial agent and anticaries.
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