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http://dx.doi.org/10.5657/FAS.2014.0181

Comparison of the Exopeptidase Activity of Fractions from Crude Extracts of Octopus Octopus vulgaris Cuvier Hepatopancreas Using Different Fractionation Methods  

Kim, Min Ji (Department of Seafood Science and Technology/Institute of Marine Industry, Gyeongsang National University)
Kim, Hyeon Jeong (Department of Seafood Science and Technology/Institute of Marine Industry, Gyeongsang National University)
Kim, Ki Hyun (Department of Seafood Science and Technology/Institute of Marine Industry, Gyeongsang National University)
Heu, Min Soo (Department of Food Nutrition/Institute of Marine Industry, Gyeongsang National University)
Kim, Jin-Soo (Department of Seafood Science and Technology/Institute of Marine Industry, Gyeongsang National University)
Publication Information
Fisheries and Aquatic Sciences / v.17, no.2, 2014 , pp. 181-187 More about this Journal
Abstract
This study was performed to identify the optimum fractionation method and conditions to obtain exopeptidase-active fractions from octopus hepatopancreas (HP) crude extracts (CEs) using four techniques: solid ammonium sulfate fractionation, polyethylene glycol (PEG) fractionation, anion exchange chromatography, and gel filtration chromatography. The fractions with the highest total activity toward L-leucine-p-nitroanilide (Leu-pNA) were fraction IV from the ammonium sulfate and PEG fractionation, and fraction II in ion exchange and gel filtration chromatography. The total exoprotease activity of these fractions was highest in fraction IV (4,050.20 U) of ammonium sulfate fractionation, followed by fraction II (3,600.28 U) from gel filtration chromatography, fraction IV (2,861.30 U) from PEG fractionation, and fraction II (2,576.28 U) from ion exchange chromatography. These results suggest that ammonium sulfate fractionation using 60-80% ammonium sulfate was the most efficient method for separating the exoprotease active fractions from CEs of octopus HP.
Keywords
Octopus; Octopus vulgaris Cuvier; Octopus hepatopancreas; Exopeptidase; Exopeptidase-active fraction; Enzyme fractionation;
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Times Cited By KSCI : 3  (Citation Analysis)
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