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http://dx.doi.org/10.5352/JLS.2012.22.6.823

Effect of Tryptic Soy Broth (TSB) and Luria-Bertani (LB) Medium on Production of Subtilisin CP-1 from Bacillus sp. CP-1 and Characterization of Subtilisin CP-1  

Park, Chang-Su (Department of Food Science and Technology, Catholic University of Daegu)
Publication Information
Journal of Life Science / v.22, no.6, 2012 , pp. 823-827 More about this Journal
Abstract
A bacterial strain producing a fibrinolytic enzyme, subtilisin CP-1, was isolated from Doen-Jang, a Korean traditional fermentation food. Based on the analysis of gene sequence of 16S rRNA and biochemical analysis, the strain was identified as Bacillus sp. and named as Bacillus sp. CP-1. To investigate the effect of the medium on the production of fibrinolytic enzyme from Bacillus sp. CP-1, two commercial bacterial culture media, tryptic soy broth (TSB) and Luria-Bertani (LB), were applied to the cultivation of Bacillus sp. CP-1. The strain secreted only one proteolytic enzyme (subtilisin CP-1) in the culture broth. The molecular weight of subtilisin CP-1 was estimated to be 28 kDa. Subtilisin CP-1 was optimally active at pH 9.0 and $45^{\circ}C$, and exhibited high specificity for Meo-Suc-Arg-Pro-Tyr-pNA (S-2586), a synthetic chromogenic substrate for chymotrypsin. The first eight amino acid residues of the N-terminal sequence of the enzyme are AQSVPYGI; this sequence is identical to that of subtilisin NAT and E.
Keywords
Bacillus; culture medium; extracellular protease; fibrinolytic enzyme; subtilisin;
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