Stromal interaction molecule 1 - Q13586 (STIM1_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q13586: 5
Plays a role in mediating store-operated Ca(2+) entry (SOCE), a Ca(2+) influx following depletion of intracellular Ca(2+) stores (PubMed:15866891, PubMed:16005298, PubMed:16208375, PubMed:16537481, PubMed:16733527, PubMed:16766533, PubMed:16807233, PubMed:18854159, PubMed:19249086, PubMed:22464749, PubMed:24069340, PubMed:24351972, PubMed:24591628, PubMed:26322679, PubMed:25326555, PubMed:28219928). Acts as Ca(2+) sensor in the endoplasmic reticulum via its EF-hand domain. Upon Ca(2+) depletion, translocates from the endoplasmic reticulum to the plasma membrane where it activates the Ca(2+) release-activated Ca(2+) (CRAC) channel subunit ORAI1 (PubMed:16208375, PubMed:16537481). Involved in enamel formation (PubMed:24621671). Activated following interaction with STIMATE, leading to promote STIM1 conformational switch (PubMed:26322679). UniProt
Pathway Maps
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Subunit Structure
Monomer in the presence of Ca(2+); it oligomerizes in absence of Ca(2+) (PubMed:18854159). Forms homooligomers and heterooligomers with STIM2 (PubMed:11463338, PubMed:11983428, PubMed:18854159, PubMed:22451904, PubMed:24351972, PubMed:24069340). Interacts (via the transmembrane region and the SOAR/CAD domain) with SPPL3; the interaction promotes the binding of STIM1 to ORAI1 (PubMed:25384971). Interacts with ORAI1 (PubMed:17905723, PubMed:19249086, PubMed:27185316, PubMed:24351972, PubMed:28219928). Interacts with MAPRE1; probably required for targeting to the growing microtubule plus ends (PubMed:19632184). Interacts with CRACR2A/EFCAB4B; the interaction is direct and takes place in absence of Ca(2+) (PubMed:20418871). Forms a complex with CRACR2A/EFCAB4B and ORAI1 at low concentration of Ca(2+), the complex dissociates at elevated Ca(2+) concentrations (PubMed:20418871). Interacts with SARAF, promoting a slow inactivation of STIM1-dependent SOCE activity, possibly by facilitating the deoligomerization of STIM1 (PubMed:22464749). Interacts with ASPH (isoform 8) (PubMed:22586105). Interacts with SLC35G1; intracellular Ca(2+)-dependent. May interact with ATP1A1, ATP2A2, ATP2B1, ATP2B4, KPNB1 and XPO1; through SLC35G1 (PubMed:22084111). Interacts with TMEM203 (PubMed:25996873). Interacts with STIMATE, promoting STIM1 conformational switch (PubMed:26322679). Interacts with TMEM178A (By similarity). Interacts with CASQ1 (via C-terminal end and preferentially with the monomeric form); this interaction increases in response to a depletion of intracellular calcium, decreases both STIM1 aggregation and clustering, interaction of STIM1 with ORAI1 and store-operated Ca(2+) entry (SOCE) activity (PubMed:27185316). Interacts with ADCY8 (PubMed:22494970). UniProt
The STIM1 Orai1-activating region/CRAC-activating domain (SOAR/CAD) mediates interaction with ORAI1 to activate the channel. UniProt
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Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
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