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Isolation and Characterization of an Alkaline Cellulase Produced by Alkalophilic Bacillus sp. HSH-810  

김지연 (인제대학교 유전체연구소)
허성호 (동의공업대학 식품생명과학)
홍정화 (인제대학교 의생명공학대학 식품생명과학부)
Publication Information
Korean Journal of Microbiology / v.40, no.2, 2004 , pp. 139-146 More about this Journal
Abstract
A bacterium producing alkaline cellulase was isolated from soil, leaf mold and compost, and was identified as alkalophilic Bacillus sp. HSH-810 by morphological, cultural and biochemical determination. The optimum cul-ture condition of Bacillus sp. HSH-810 for the growth and alkaline cellulase production was $30^{\circ}C$ and pH 10.0. The maximum alkaline cellulase production was obtained when 1.0%(w/v) CMC, 0.5%(w/v) peptone, 0.02%(w/v) $CaCl_2$ and 0.02(w/v) $CoCl_2$ were used as carbon source, nitrogen source and mineral source, respectively. The optimum pH and temperature of the enzyme activity were pH 10.5 and $50^{\circ}C$, respectively. This enzyme was fairly stable in the pH range of 6.0-13.0 and at $50^{\circ}C$. For the effect of surfactants, the activity of alkaline cellulase was stable in the presence of sodium-$\alpha$-olefin sulfonate (AOS), sodium dodecyl sulfonate (SDS), Tween 20 and Tween 80, but inhibited by the presence of 0.1 linear alkyl-benzene sulfonate (LAS) sig-nificantly.
Keywords
alkaline cellulase; alkalophilic; Bacillus sp.; identification; isolation;
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