Department of Cell Physiology and Metabolism, Rue Michel-Servet, 1, University of Geneva, Switzerland.
Department of Cell Physiology and Metabolism, Rue Michel-Servet, 1, University of Geneva, Switzerland.
Cell Calcium. 2018 Jul;73:70-71. doi: 10.1016/j.ceca.2018.04.002. Epub 2018 Apr 18.
GRAM domain proteins were reported as novel ER-PM tethers defining specific membrane contact sites (MCS) subdomains. GRAMD2a pre-marks the sites occupied by STIM1 at MCS and its ablation impairs STIM1 translocation, but not store-operated Ca entry. We discuss these apparently counterintuitive findings in the context of STIM/ORAI signaling at MCS.
GRAM 结构域蛋白被报道为新型内质网-质膜连接蛋白,可定义特定的膜接触位点 (MCS) 亚区。GRAMD2a 预先标记 MCS 中 STIM1 占据的位点,其缺失会损害 STIM1 的易位,但不会影响钙库操纵的钙内流。我们将根据 MCS 处的 STIM/ORAI 信号转导来讨论这些看似违反直觉的发现。