An alkaline calcium dependent trypsin from the viscera of Goby (Zosterisessor ophiocephalus) was purified
to homogeneity with a 16-fold increase in specific activity and 20% recovery. The purified trypsin
appeared as a single band on sodium dodecyl sulphate-polyacrylamide gel (SDS-PAGE) and native-PAGE.
The enzyme had an estimated molecular weight of 23.2 kDa.
The optimum pH was 9.0, and the enzyme was extremely stable in various pH buffers between pH
7.0 and 11.0. The optimum temperature for enzyme activity was 60 ◦C, and the activity and stability
of trypsin was highly dependent on the presence of calcium ion. At 60 ◦C, Ca2+ (5 mM) stimulated the
protease activity by 220%. The trypsin kinetic constants, Km and kcat, were 0.312 mM and 2.03 s−1.
The enzyme showed high stability towards non-ionic surfactants and oxidizing agent. In addition, the
enzyme showed excellent stability and compatibility with some commercial solid and liquid detergents.
An alkaline calcium dependent trypsin from the viscera of Goby (Zosterisessor ophiocephalus) was purifiedto homogeneity with a 16-fold increase in specific activity and 20% recovery. The purified trypsinappeared as a single band on sodium dodecyl sulphate-polyacrylamide gel (SDS-PAGE) and native-PAGE.The enzyme had an estimated molecular weight of 23.2 kDa.The optimum pH was 9.0, and the enzyme was extremely stable in various pH buffers between pH7.0 and 11.0. The optimum temperature for enzyme activity was 60 ◦C, and the activity and stabilityof trypsin was highly dependent on the presence of calcium ion. At 60 ◦C, Ca2+ (5 mM) stimulated theprotease activity by 220%. The trypsin kinetic constants, Km and kcat, were 0.312 mM and 2.03 s−1.The enzyme showed high stability towards non-ionic surfactants and oxidizing agent. In addition, theenzyme showed excellent stability and compatibility with some commercial solid and liquid detergents.
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