Recent advances on characterization of protein oxidation in aquatic products: A comprehensive review

Abstract

In addition to microbial spoilage and lipid peroxidation, protein oxidation is increasingly recognized as a major cause for quality deterioration of muscle-based foods. Although protein oxidation in muscle-based foods has attracted tremendous interest in the past decade, specific oxidative pathways and underlying mechanisms of protein oxidation in aquatic products remain largely unexplored. The present review covers the aspects of the origin and site-specific nature of protein oxidation, progress on the characterization of protein oxidation, oxidized proteins in aquatic products, and impact of protein oxidation on protein functionalities. Compared to meat protein oxidation, aquatic proteins demonstrate a less extent of oxidation on aromatic amino acids and are more susceptible to be indirectly oxidized by lipid peroxidation products. Different from traditional measurement of protein carbonyls and thiols, proteomics-based strategy better characterizes the targeted oxidation sites within proteins. The future trends using more robust and accurate targeted proteomics, such as parallel reaction monitoring strategy, to characterize protein oxidation in aquatic products are also given.

Keywords:

• aquatic products
• protein oxidation
• oxidative products
• generic evaluation
• targeted proteomics
• protein functionality

Disclosure statement

The authors declare they have no conflicts of interest.

Additional information

Funding

This review was supported by National Natural Science Foundation of China (31972007; 32202118), China Agriculture Research System of MOF and MARA (CARS-45), and International Postdoctoral Exchange Fellowship Program 2020 by China Postdoctoral Council (2020081).