STIM1 and breast cancer: Interestingly, disruption of Orai1‐SK3 interaction in the rafts was shown to limit metastatic spread of breast cancer cells (Girault et al. 2011; Guéguinou et al. 2014), and STIM1 was found to be located not only in the ER but also in the plasma membrane (Debant et al. 2019).