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Artemin protects cells and proteins against oxidative and salt stress.
International Journal of Biological Macromolecules 2017 Februrary
Artemin is an abundant thermostable protein in Artemia encysted embryos under environmental stresses. It is confirmed that high regulatory expression of artemin is relevant to stress resistance in this crustacean. Here, the protective role of artemin from Artemia urmiana has been investigated on survival of bacterial cells under salt and oxidative shocks. Also, for continuous monitoring of the effect of artemin in prevention of proteins aggregation/inactivation, co-expression of artemin and luciferase (as an intracellular reporter) in bacterial cells was performed. According to the results, residual activity of luciferase in artemin expressing E. coli cells exposing to different concentrations of H2O2 and NaCl was significantly higher than non-expressing cells. The luciferase activity was rapidly lost in control cells under salt treatments while in co-transformed cells, the activity was considerably retained at higher salt concentrations. Also, analysis from cell viability assays showed that artemin-expressing cells exhibited more resistance to both stress conditions. In the present study, we document for the first time that artemin can protect proteins and bacterial cells against oxidative and salt stress conditions. These results can declare the resistance property of this crustacean against harsh environmental conditions.
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