Comp Biochem Physiol Part D Genomics Proteomics 2013 Sep 01;83:194-200. doi: 10.1016/j.cbd.2013.05.001.

Identification of differential expressed proteins and characterization their mRNA expression in thermally stressed Apostichopus japonicus.

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In this study, we present a comparative proteomic analysis of the global protein expression changes in sea cucumber after 7 days exposure at 25°C. Using two-dimensional electrophoresis followed by MALDI-TOF MS/MS, 27 protein spots with significant differences in abundance were identified and characterized. The identified proteins belonged primarily to the following four functional categories: cytoskeletal, material and energy metabolism, calcium homeostasis and extracellular matrix. The mRNA expression levels of 7 differentially expressed proteins were further assessed by qRT-PCR. The expression levels of 6 genes, including collagen, ATP synthase, major yolk protein, ferritin, nectin and protein disulfide isomerase showed significant differences under thermal stress, and among them, only two genes-ATP synthase and major yolk protein-showed consistent levels of protein and mRNA expression. Our results offer insight into the complex changes in protein turnover during higher temperature exposure in sea cucumber.

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Genes referenced: atp5pd LOC100887844 LOC115924199