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- W2553059634 abstract "Hatching enzyme is a protease which can degrade the membrane of egg. In this study, a hatching enzyme was purified from starfish (Asterina pectinifera) with 6.34 fold of purification rate, 5.04 % of yield, and 73.87 U/mg of specific activity. The molecular weight of starfish hatching enzyme was 86 kDa, which was reduced to 62 kDa after removal of N-linked oligosaccharides. The optimal pH and temperature of the hatching enzyme activity were pH 7.0 and 40 °C, respectively, while those of stability were pH 8 and 20 °C. The kinetic parameters, Vmax , Km , K cat and Kcat/Km values were 0.197 U/ml, 0.289 mg/ml, 112.57 s-1, and 389.52 ml/mg s, respectively. Zn2+ increased the enzyme activity by 167.28 %, while EDTA, TPCK, TGCK, leupeptin, PMSF, and TLCK decreased. In addition, Ca2+, Mg2+, and Cu2+ did not affect the enzyme activity. The starfish hatching enzyme activity pretreated with EDTA was recovered by Zn2+. Therefore, the starfish hatching enzyme was classified as a serine-zinc protease." @default.
- W2553059634 created "2016-11-30" @default.
- W2553059634 creator A5047703391 @default.
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- W2553059634 date "2016-11-22" @default.
- W2553059634 modified "2023-10-16" @default.
- W2553059634 title "Characterization of a novel hatching enzyme purified from starfish Asterina pectinifera" @default.
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- W2553059634 doi "https://doi.org/10.1186/s40064-016-3484-7" @default.
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