RT Generic T1 STIM and Orail Variants in Store-Operated Calcium Entry A1 Rosado, Juan A. A1 Diez, Raquel A1 Smani, Tarik A1 Jardin, Isaac K1 calcium entry K1 STIM1 K1 STIM2 K1 orail K1 splice variants K1 Stromal interaction molecule-1 K1 Alternative translation initiation K1 Activates crac channels K1 Ca2+ entry K1 Trpc channels K1 Mechanistic insights K1 Arc channel K1 Sam domain K1 C-terminus K1 I-crac AB Store-operated Ca2+ entry (SOCE) is an ubiquitous mechanism for Ca2+ entry in eukaryotic cells. This route for Ca2+ influx is regulated by the filling state of the intracellular Ca2+ stores communicated to the plasma membrane channels by the proteins of the Stromal Interaction Molecule (STIM) family, STIM1, and STIM2. Store-dependent, STIM1-modulated, channels include the Ca2+ release-activated Ca2+ channels, comprised of subunits of Orai proteins, as well as the store-operated Ca2+ (SOC) channels, involving Orai1, and members of the canonical transient receptor potential family of proteins. Recent studies have revealed the expression of splice variants of STIM1, STIM2, and Orai1 in different cell types. While certain variants are ubiquitously expressed, others, such as STIM1L, show a more restricted expression. The splice variants for STIM and Orai1 proteins exhibit significant functional differences and reveal that alternative splicing enhance the functional diversity of STIM1, STIM2, and Orai1 genes to modulate the dynamics of Ca2+ signals. PB Frontiers media sa SN 1663-9812 YR 2016 FD 2016-01-13 LK http://hdl.handle.net/10668/19238 UL http://hdl.handle.net/10668/19238 LA en DS RISalud RD Apr 11, 2025