Title | Isolation and Identification of Tyrosinase-Inhibitory and Copper-Chelating Peptides from Hydrolyzed Rice-Bran-Derived Albumin. |
Publication Type | Journal Article |
Year of Publication | 2018 |
Authors | Kubglomsong S, Theerakulkait C, Reed RL, Yang L, Maier CS, Stevens JF |
Journal | J Agric Food Chem |
Volume | 66 |
Issue | 31 |
Pagination | 8346-8354 |
Date Published | 2018 Aug 08 |
ISSN | 1520-5118 |
Keywords | Albumins, Amino Acid Sequence, Chelating Agents, Copper, Enzyme Inhibitors, Hydrolysis, Monophenol Monooxygenase, Oryza, Peptides, Plant Proteins, Seeds |
Abstract | Rice-bran albumin (RBAlb), which shows higher tyrosinase-inhibitory activity than other protein fractions, was hydrolyzed with papain to improve the bioactivity. The obtained RBAlb hydrolysate (RBAlbH) was separated into 11 peptide fractions by RP-HPLC. Tyrosinase inhibition and copper chelation activities decreased with increasing retention times of the peptide fractions. RBAlbH fraction 1, which exhibited the greatest activity, contained 13 peptides whose sequences were determined by using LC-MS/MS. Most of the peptide sequences contained features of previously reported tyrosinase-inhibitory and metal-chelating peptides, especially peptide SSEYYGGEGSSSEQGYYGEG. RBAlbH fraction 1 showed more effective tyrosinase inhibition (IC = 1.31 mg/mL) than citric acid (IC = 9.38 mg/mL), but it was less effective than ascorbic acid (IC = 0.03 mg/mL, P ≤ 0.05). It showed copper-chelating activity (IC = 0.62 mg/mL) stronger than that of EDTA (IC = 1.06 mg/mL, P ≤ 0.05). These results suggest that RBAlbH has potential as a natural tyrosinase inhibitor and copper chelator for application in the food and cosmetic industries. |
DOI | 10.1021/acs.jafc.8b01849 |
Alternate Journal | J. Agric. Food Chem. |
PubMed ID | 30016586 |
PubMed Central ID | PMC6431294 |
Grant List | S10 OD020111 / OD / NIH HHS / United States |