Label-Free Proteomics of Tilapia Fillets and Their Relationship with Meat Texture During Post-Mortem Storage

文献类型： 外文期刊

第一作者： He, Yanfu

作者： He, Yanfu;Huang, Hui;Li, Lai-Hao;Yang, Xianqing;He, Yanfu

作者机构：

关键词： Tilapia skeletal muscle; Label-free; Proteomics; Texture; Meat tenderness

期刊名称：FOOD ANALYTICAL METHODS （ 影响因子：3.366； 五年影响因子：3.07 ）

ISSN： 1936-9751

年卷期： 2018 年 11 卷 11 期

页码：

收录情况： SCI

摘要： Here, we aimed to study the changes in proteome of tilapia during post-mortem storage. The effects of post-mortem storage time (0 and 7days in ice storage) on the proteome of tilapia skeletal muscle was characterized by label-free proteomics. In total, 902 proteins were identified, of which 34 proteins underwent alterations that were statistically significant (P<0.05). The 15 up-regulated and 19 down-regulated proteins were mainly structural proteins, followed by transcription and translation regulation, enzymes, and stress proteins. The top three enriched Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways are metabolic pathways, tight junction, and ribosome. Two differentially abundant proteins, pgm1 and ldha, were selected for further verification using 0- and 7-day iced storage fish muscle. Western blotting analysis showed significantly lower levels of two proteins, ldha and pgm1, in ice-stored tilapia fillets than in fresh tilapia fillets. Our results indicate that meat tenderness is related to structural protein degradation and increased levels of lactic acid caused by enzymes and anaerobic conditions and provide an important basis toward enabling further understanding of the molecular mechanisms responsible for differences in fish texture and meat tenderness between fresh and ice-stored fish.

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