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Peer reviewed
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Zhu, Wenhui; Luan, Hongwei; Bu, Ying; Li, Xuepeng; Li, Jianrong; Zhang, Yuyu
Journal of the science of food and agriculture, June 2021, 2021-Jun, 2021-06-00, 20210601, Volume: 101, Issue: 8Journal Article
BACKGROUND Fish sauce has a subtle flavor with prominent umami and salty taste, and is accompanied by a certain sweetness and bitterness. In order to identify a wider range of umami peptides, Chinese southern and northern anchovy sauce were selected for the study. RESULTS Seventeen peptides were obtained by separation and purification, and their taste activity was predicted. Through the taste characterization and descriptive analysis, it was found that the synthesized peptides were umami and umami‐enhancing peptides. Seventeen umami peptides were simulated and embedded into the umami receptor T1R1/T1R3 by inserting into the Venus flytrap domain (VFTD) of the T1R3 subunit; the interaction forces were mainly hydrogen bonding, electrostatic interaction, van der Waals force and hydrophobic interaction. According to the docking interaction energies, long‐chain peptides may be easier to bind to the receptor than short‐chain peptides. Asp196, Glu128 and Glu197 were the main binding sites for docking, and could affect umami synergism. CONCLUSION For the first time, novel umami peptides in Chinese anchovy sauce have been reported. This study is helpful for discovering umami marine resource peptides, and can provide a basis for further understanding the flavor system of anchovy sauce. © 2020 Society of Chemical Industry
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