Interest has emerged in the therapeutic potential of inhibiting store operated calcium (Ca) entry (SOCE) for melanoma and other cancers because malignant cells exhibit a strong dependence on Ca flux for disease progression. We investigated the effects of deleting Selenoprotein K (SELENOK) in melanoma since previous work in immune cells showed SELENOK was required for efficient Ca flux through the endoplasmic reticulum Ca channel protein, inositol 1,4,5-trisphosphate receptor (IP3R), which is due to the role SELENOK plays in palmitoylating and stabilizing the expression of IP3R. CRISPR/Cas9 was used to generate SELENOK-deficiency in human melanoma cells and this led to reduced Ca flux and impaired IP3R function, which inhibited cell proliferation, invasion, and migration.
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