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Purification and identification of antioxidant peptides from round scad (Decapterus maruadsi) hydrolysates by consecutive chromatography and electrospray ionization-mass spectrometry

文献类型: 外文期刊

作者: Hu, Xiao 1 ; Yang, Xianqing 1 ; Wang, Tingting 1 ; Li, Laihao 1 ; Wu, Yanyan 1 ; Zhou, Ya 1 ; You, Lijun 4 ;

作者机构: 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Minist Agr & Rural Affairs, Key Lab Aquat Prod Proc, Guangzhou 510300, Peoples R China

2.Jiangsu Ocean Univ, Coinnovat Ctr Jiangsu Marine Bioind Technol, Lianyungang 222005, Peoples R China

3.Shanghai Ocean Univ, Coll Food Sci & Technol, Shanghai 201306, Peoples R China

4.South China Univ Technol, Sch Food Sci & Engn, 381 Wushan Rd, Guangzhou 510640, Peoples R China

关键词: Round scad (Decapterus maruadsi); Hydrolysis; Antioxidant peptides; Purification; Identification

期刊名称:FOOD AND CHEMICAL TOXICOLOGY ( 影响因子:6.023; 五年影响因子:5.844 )

ISSN: 0278-6915

年卷期: 2020 年 135 卷

页码:

收录情况: SCI

摘要: Round scad (Decapterus maruadsi) was hydrolyzed with a double-enzyme (a mixture of neutrase and trypsin) to obtain antioxidant peptides. The round scad hydrolysates obtained by 5-h hydrolysis (RSH) displayed the strongest antioxidant activities, which could scavenge the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, the hydroxyl radical, and exhibit reducing power. RSH was further separated into four fractions by using an ultrafiltration membrane system, and low-molecular-weight fraction RSH-IV (<5 kDa) showed the highest antioxidant activities. Fraction RSH-IV was then purified with gel filtration chromatography followed by reverse high-performance liquid chromatography (RP-HPLC). The sequence of the purified antioxidant peptide was identified as Lys-Gly-Phe-Arg (506 Da) by liquid chromatography/electrospray ionization tandem mass spectrometry (LC-MS/MS). Additionally, the purified peptide could scavenge DPPH radical at IC50 value of 0.13 mg/mL, and it showed a 49.08-fold higher DPPH radical scavenging activity compared with that of the crude RSH. The results suggest that antioxidant peptides obtained from round scad (Decapterus maruadsi) could be a good source of natural antioxidant.

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