- Author:
Cuiling WU
1
;
Ribang WU
1
;
Dan LIU
1
;
Xinghao YANG
1
;
Jiang ZHANG
1
;
Jiafeng HUANG
1
;
Hailun HE
1
Author Information
- Publication Type:Journal Article
- Keywords: Corrhinus molitorella; DNA oxidation damage; DPPH; ORAC; antioxidant peptide; collagen
- MeSH: Amino Acid Sequence; Animals; Antioxidants; chemistry; Chromatography, Gel; Collagen; chemistry; Cyprinidae; Dextrans; Hydrolysis; Oxidation-Reduction; Peptide Hydrolases; Peptides; chemistry; Skin; chemistry
- From: Chinese Journal of Biotechnology 2016;32(12):1727-1734
- CountryChina
- Language:Chinese
- Abstract: In order to prepare antioxidant peptide through hydrolyzing low-value protein resources with bacterial extracellular proteases and to discover novel proteases, crude extracellular protease from Pseudoalteromonas sp. SHK1-2 was obtained through fermentation which was used to hydrolyze collagen extracted from Cirrhinus molitorella skin. Small peptide fraction was isolated from hydrolysate by ultrafiltration and Sephadex LH-20 size exclusion chromatography and showed 1, 1-diphenyl-2-picrylhydrazyl radical scavenging activity (35.6%±7%), oxygen radical absorbance capacity and inhibition of DNA oxidation damage. The molecule weight was 776.2 Da, and amino acid sequence was Thr-Ala-Gly-His-Pro- Gly-Thr-His through liquid chromatography mass spectrum. Our findings suggest that peptide obtained from low-value protein of fish waste by hydrolysis with bacterial protease has antioxidant activity.