Production Condition, Purification and Properties of Anticaries Microbial Agent by Bacilluse alkalo-philshaggy JY-827

Bacillus alkalophilshaggy JY-827가 생산하는 항우식균물질의 생산조건과 분리, 정제 및 특성

  • Published : 2000.10.01

Abstract

The study was performed to investgate the excellent microbial anticaries substance which is more effective that the chlorhexidine in the dental caries treatment. A typi-cal strain which produced the most excellent antimicrobial subatance was selected. and identified novel alkalophillic Bacillus alkalophilshaggy JY-827. For the maximal production of themicrobial antibiotic against Streptococcus mutans from B. alkalophilshaggy JY-827, the optimal culture condition was in the medium containing glucose 15g/ L, pepton 10g/L and $K_2$$HPO_4$ 2g/L the highest production of antibiotic against S.mutans was obtained at $25^{\circ}C$ and pH 11.0 for 5 days. The antibiotic from B. alkalophilshaggy JY-827 was purified by organic solvent extraction, silica gel and sephadex LH-20 column chromatograpies, and then crystallized with methanol. The crystallin compoma-tion of this antibiotic was as a curcular shape. The melting point and rm[$\alpha$]$D^{20}$ were 152-154$^{\circ}C$ and +55。, respec-tively. Based on Instumental analyses such as FT-IR, $^{1}$H-NMR $^{13}$ C-NMR and GC-mass, the antibiotic was identified as aminoglycoside. It was obtained as amorphous white power, and soluble in water power, and soluble in water, methanol but insoluble in ether, chroloform. This antibiotic inhibited the growth of S.mutans to about 3 day at the concentration of $2.5$\times$10^{-7}$ /M. It was stable at the alkalli condition but unstable within the acid condition. It was also stable up to $70^{\circ}C$.

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