Isolation and Charaterization of Bioactive Peptides from Hwangtae (yellowish dried Alaska pollack) Protein Hydrolysate

  • Cho, San-Soon (Department of Food Science and Technology, Kongju National University) ;
  • Lee, Hyo-Ku (Department of Food Science and Technology, Kongju National University) ;
  • Yu, Chang-Yeon (Division of Applied Plants Science, Kangwon National University) ;
  • Kim, Myong-Jo (Division of Applied Plants Science, Kangwon National University) ;
  • Seong, Eun-Soo (Bioherb Research Institute, Kangwon National University) ;
  • Ghimire, Bimal Kumar (Bioherb Research Institute, Kangwon National University) ;
  • Son, Eun-Hwa (Department of Herbal Medicine Resource, Kangwon National University) ;
  • Choung, Myoung-Gun (Department of Herbal Medicine Resource, Kangwon National University) ;
  • Lim, Jung-Dae (Department of Herbal Medicine Resource, Kangwon National University)
  • Published : 2008.09.30


Hwangtae, dried Alaska pollack, is a major storage product in the fish processing industry. Hwangtae is prepared by removing the internal organs and drying outdoors during the cold witner months by allowing it to thaw during the daytime and re-freeze at night under sub-zero ($-10^{\circ}C$) conditions and gradually dry from December until the next April for around 5 months from Myungtae. In this study, ground Hwangtae was hydrolyzed using two proteolytic enzymes (pepsin and alcalase) which produced five soluble active peptides from Hwangtae (yellowish dried Pollack, Theragra chalcogramma) protein. Two different peptides with strong antioxidative activity were isolated from the hydrolysate using consecutive chromatographic methods of Sephadex G-25 gel, ion-exchange chromatography on a Sepharose-Sephadex C-25 gel, and high-performance liquid chromatography. The isolated peptides, APO1 and APO2, were composed of 16 and 13 amino acid residues, respectively. Both peptides contained a Gly residue at the C-terminus and the repeating motif Gly-Pro-Hyp. The peptide with a molecular weight less than 1,000 Daltons (APACE) obtained from enzymatic hydrolysates of Hwangtae exhibited the highest ACE inhibitory activity. The APACE peptides was composed of 4 amino acid residues (Gly-Leu-Leu-Pro). These results suggest that Hwangtae hydrolysates could be a good source of peptides with ACE inhibitory activity. Biochemical analysis indicated that two 70 kDa peptides (APG1 and APG2) isolated from the hydrolysate had gelatinoytic activity, which was shown to be a calcium dependent protease type as showed by gelatin SDS PAGE.


Hwangtae (yellowish dried pollack);bioactive peptide;antioxidative activity;ACE inhibitory activity;gelatinolytic activity


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