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The short shelf life of  Portunus trituberculatus  is an important factor limiting the progress of this industry. Electron beam irradiation (EBI) can effectively kill the microorganisms, but the effect of EBI on crab muscle tissue remains unknown. In this study, a proteomics method based on labeling with the tandem-mass tag (TMT) was used to study the protein changes occurring in crabs under different doses of EBI at 0, 2, 4, 6, 8, and 10 kGy. A total of 6123 proteins were identified, of which 1490 were significantly differentially expressed proteins (DEPs), and 91 were common DEPs. An in-depth data analysis showed that the DEPs were involved in various cellular processes, particularly metabolic processes. We combined gene ontology and Kyoto Encyclopedia of Genes and Genomes pathway analyses, and our results focused on oxidative phosphorylation, tight junction, and oxytocin signaling pathways. Key proteins responsible for the effects of EBI on crabs were also found.

Effects of Electron Beam Irradiation on Portunus trituberculatus Based on Tandem-Mass Tag-Based Quantitative Proteomic Analysis