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Characterization of Cellulolytic Activity from Pseudomonas sp. JH1014  

Heo, Hee-Yeon (Department of Agricultural Chemistry, Sunchon National University)
Jeong, Yu-Jin (Department of Agricultural Chemistry, Sunchon National University)
Shin, Eun-Sun (Department of Agricultural Chemistry, Sunchon National University)
Kwon, Eun-Ju (Department of Agricultural Chemistry, Sunchon National University)
Kim, Yu-Jeong (Department of Agricultural Chemistry, Sunchon National University)
Kim, Jung-Ho (Department of Agricultural Chemistry, Sunchon National University)
Kim, Hoon (Department of Agricultural Chemistry, Sunchon National University)
Publication Information
Applied Biological Chemistry / v.48, no.4, 2005 , pp. 322-325 More about this Journal
Abstract
Pseudomonas sp. JH1014 was isolated from stream water as a detergent-compatible alkaline protease producing microorganism. The strain produced no detectable cellulolytic activity in LB medium. The addition of carboxymethyl cellulose induced the production of carboxymethyl cellulase (CMCase) without causing any significant change in the growth pattern of the strain. The strain reached its maximum growth after 9 to 12 h at $37^{\circ}C$, and the production of CMCase in the presence of the substrate reached its maximum after 21 h of growth at $37^{\circ}C$. The optimum pH of the crude enzyme preparation was pH 6.0. The enzyme had an optimal temperature at $55^{\circ}C$, and retained 70% of its original activity when preincubated at $70^{\circ}C$ for 10 min. Activity staining of the crude enzyme preparation separated on an SDS-PAGE gel showed two active bands with molecular masses of 54 and 30 kDa, indicating that Pseudomonas sp. JH1014 produced at least 2 kinds of CMCase.
Keywords
Cellulolytic microorganism; Pseudomonas sp. JH1014; enzyme induction; CMCase;
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