文献类型：期刊文献

英文题名：Exploring of multi-functional umami peptides from Stropharia rugosoannulata: Saltiness-enhancing effect and mechanism, antioxidant activity and potential target sites

作者：Chen, Wanchao[1];Li, Wen[1];Wu, Di[1];Zhang, Zhong[1];Li, Zhengpeng[1];Li, Long[2];Wu, Ting[3,4];Yang, Yan[1]

机构：[1]Shanghai Acad Agr Sci, Natl Engn Res Ctr Edible Fungi, Key Lab Edible Fungi Resources & Utilizat South, Minist Agr,Inst Edible Fungi, Shanghai 201403, Peoples R China;[2]Henan Acad Sci, Inst Chem, Zhengzhou 450002, Henan, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Res Ctr Anal & Test, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：439

外文期刊名：FOOD CHEMISTRY

收录：;EI(收录号：20235215291326);WOS:【SCI-EXPANDED(收录号:WOS:001147278300001)】；

基金：This work was supported by the Natural Science Foundation of Shanghai [grant number 23ZR1426100]; the earmarked fund for China Agriculture Research System (CARS-20).

语种：英文

外文关键词：Umami peptide; Saltiness; Salt-enhancing; Antioxidant; Stropharia rugosoannulata

摘要：Umami peptides enhance flavor and offer potential health benefits. We analyzed the taste-value profiles of five novel umami peptides from Stropharia rugosoannulata using E-tongue, exhibiting significant saltiness characteristics. While the peptides PHEMQ and SEPSHF exhibited higher saltiness, their mixture with salt did not enhance saltiness compared to individual peptides. Surprisingly, SGCVNEL, which was initially weak in saltiness, showed remarkably enhanced saltiness when mixed with salt, possibly due to have strong binding with receptors. Molecular docking elucidated the salt-forming mechanism of TMC4, highlighting the P2-domain and hydrogen bonds' role in the composite structure stability. Evaluation of the antioxidant activity evaluation demonstrated dose-dependent effects primarily through free radical scavenging via the single-electron transfer potential mechanism for SGCVNEL, EPLCNQ, and ESCAPQL. Docking experiments with antioxidant targets revealed varied binding stabilities, indicating diverse antioxidant effects of the peptides. These findings provide valuable insights into the exploration and application of versatile bioactive flavor peptides.