Conformational Changes of Whey and Pea Proteins upon Emulsification Approached by Front-Surface Fluorescence.

ABSTRACT: Proteins are widely used to stabilize emulsions, and plant proteins have raised increasing interest for this purpose. The interfacial and emulsifying properties of proteins depend largely on their molecular properties. We used fluorescence spectroscopy to characterize the conformation of food proteins from different biological origins (dairy or pea) and transformation processes (commercial or lab-made isolates) in solution and at the oil-water interface. The fourth derivative of fluorescence spectra provided insights in the local environment of tryptophan (Trp) residues and thus in the protein structure. In emulsions, whey proteins adsorbed with their Trp-rich region at the oil-water interface. Proteins in the commercial pea isolate were present as soluble aggregates, and no changes in the

SUBMITTER: Hinderink EBA 

PROVIDER: S-EPMC8213056 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature