Un article intitulé " Electrically Switchable Nanolever Technology for the Screening of Metal-Chelating Peptides in Hydrolysates" vient d'être publié dans "Journal of Agricultural and Food Chemistry".
Auteurs : Sarah El Hajj, Cindy Tatiana Sepúlveda Rincón, Jean-Michel Girardet, Céline Cakir-Kiefer, Loic Stefan, José Edgar Zapata Montoya, Sandrine Boschi-Muller, Caroline Gaucher, Laetitia Canabady-Rochelle
J Agric Food Chem. 2021 Aug 11;69(31):8819-8827. doi: 10.1021/acs.jafc.1c02199.
Abstract
Metal-chelating peptides (MCP) are considered as indirect antioxidants due to their capacity to inhibit radical chain reaction and oxidation. Here, we propose a new proof of concept for the screening of MCPs present in protein hydrolysates for valorizing their antioxidant properties by using the emerging time-resolved molecular dynamics technology, switchSENSE. This method unveils possible interactions between MCPs and immobilized nickel ions using fluorescence and electro-switchable DNA chips. The switchSENSE method was first set up on synthetic peptides known for their metal-chelating properties. Then, it was applied to soy and tilapia viscera protein hydrolysates. Their Cu2+-chelation capacity was, in addition, determined by UV-visible spectrophotometry as a reference method. The switchSENSE method has displayed a high sensitivity to evidence the presence of MCPs in both hydrolysates. Hence, we demonstrate for the first time that this newly introduced technology is a convenient methodology to screen protein hydrolysates in order to determine the presence of MCPs before launching time-consuming separations.