Review: current trends in oat protein recovery and utilization in aqueous food systems

Abstract

Oat protein itself, as a substance, has extensively been studied providing information on its nutritional value, some functional properties and possible applicability in food systems. Chosen protein isolation methods and technological aspects define final composition of obtained oat protein product, its concentration, nutrition value and its functionality in food industry. Scientific data on oat protein recovery methods, typically relying on protein solubility or dry fractionation, provides an insufficient knowledge about the success in commercialization of oat protein recovery technologies and their derivatives in form of oat protein. The aim of the study was to analyse and summarize the research findings on oat protein extraction methods and functional properties of oat protein. Semi-systematic, monographic methods were used to analyse the oat protein isolation techniques, functional properties of oat protein in aqueous food systems, covering the latest information on oat protein extraction methods. Wet and dry isolation methods were demonstrated as main methods in oat protein extraction. Functional properties of oat protein, such as thermal stability, solubility, emulsification, water hydration capacity and foaming were reviewed and evaluated, identifying limitations and protein alterations which occur through the oat protein extraction process. The study provides recent trends in oat protein recovery technologies, along with an overview of current and potential oat protein utilization in food systems.

Characterisation of the Enzymatically Extracted Oat Protein Concentrate after Defatting and Its Applicability for Wet Extrusion

“…In addition, the protein recovery methods influence functional properties of protein as a raw material. Oat protein might be recovered by a dry isolation method [ 12 , 13 ] as well as a wet isolation method, which subsequently assumes solvent extraction, precipitation or enzymatic treatment [ 14 ]. Most of conducted studies are dedicated to oat protein concentrates or isolates that passed alkaline extraction with subsequent protein precipitation shifting pH at an isoelectric point, thus later reporting functional properties of recovered protein [ 15 ] and their structure [ 16 ].…”