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In relation to this article, we declare that there is no conflict of interest.
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Received October 15, 2010
Accepted December 3, 2010
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Isolation of the polysaccharidase-producing bacteria from the gut of sea snail, Batillus cornutus

Advanced Environmental Biotechnology Research Center, Pohang University of Science and Technology, Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea 1Department of Chemical Engineering, Keimyung University, Dalseo-gu, Daegu 704-701, Korea
jeonghha@postech.ac.kr
Korean Journal of Chemical Engineering, May 2011, 28(5), 1252-1259(8), 10.1007/s11814-010-0506-y
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Abstract

This study was conducted to isolate microorganisms from the gut of the marine turban shell, Batillus cornutus, which inhabits the mainland of South Korea and primarily feeds on brown algae. We were interested in isolating such gut bacteria by considering their potential to produce the polysaccharidases required for digestion of brown seaweeds and isolated three different bacteria from the gut of Batillus cornutus. The isolated bacteria were identified as Bacillus_x000D_ sp. JMP-A, Bacillus sp. JMP-B and Staphylococcus sp. JMP-C. The organisms were evaluated for their ability to produce polysaccharidases such as cellulase, alginate lyase, laminarinase and kelp-lyase. Bacillus sp. JMP-A and Bacillus sp. JMP-B showed a clear zone of CMC hydrolysis with a radius 1.10 (±0.057) and 3.88 cm (±0.088), respectively, whereas Staphylococcus sp. JMP-C showed no zone of CMC hydrolysis. SEM analysis confirmed that the ability of the bacterial isolates to degrade kelp differs and is correlated with kelp-lyase production. The cell free extract of the Bacillus sp. JMP-A isolate showed the highest activities of CM-cellulase, α-cellulase, laminarinase and kelp-lyase, which were 22.76, 27.10, 66.59 and 64.36 U/mg, respectively. Meanwhile, the amount of sugars released was higher during the saccharification of kelp by dialyzed intracellular enzymes of the bacterial isolates than when dialyzed extracellular_x000D_ enzyme was used. Experimental results of dialyzed enzymatic saccharification of the kelp demonstrated that use of partially purified enzymes was effective for glucose production.

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