| Title | Molecular Cloning and Characterization of CMCase gene (celC) from Salmonella typhimurium UR |
|---|---|
| Author | Ju-Soon Yoo1, Youn-Ju Jung 1 , Soo-Yeol Chung 2, Young-Choon Lee 1 and Yong-Lark Choi 1 ,* |
| Address | 1 Division of Biotechnology, Faculty of Natural Resources and Life Science, Dong-A University, Busan, 604-714 ; 2Department of Food Science and Nutrition, Dongju College, Busan, Korea |
| Bibliography | Journal of Microbiology, 42(3),205-210, 2004, |
| DOI | |
| Key Words | Salmonella typhimurium, CMCase, celC, CMC-SDS-PAGE |
| Abstract | The sequence coding for carboxymethylcellulase (CMCase, CelC) was isolated from the DNA of Salmonella typhimurium UR1. Comparison between the deduced amino acid sequence of CelC (368 amino acid residues, Molecular mass 41 kDa) and that of the previously published CMCase revealed that this enzyme belongs to the cellulase family 8 and D. The protein was overproduced in Escherichia coli using T7 expression system, and its activity was confirmed by CMC-SDS-PAGE. When the overexpressed CelC protein was tested on cellulose-type substrates, the recombinant protein is able to degrade cellulose-type substrates, such as CM-cellulose, xylan, avicel, lichenan, and laminarin. Optimal temperature and pH for enzyme activity were found to be 50^oC and pH 6.5, respectively. |
| Download PDF | p.205-2101.pdf |