FEATURES

FAMILY

DESCRIPTION

Also known as CRCM1_HUMAN, ORAI1, CRACM1, TMEM142A. Ca(2+) release-activated Ca(2+) (CRAC) channel subunit which mediates Ca(2+) influx following depletion of intracellular Ca(2+) stores and channel activation by the Ca(2+) sensor, STIM1 (PubMed:16582901, PubMed:16645049, PubMed:16733527, PubMed:16766533, PubMed:16807233, PubMed:19249086, PubMed:23307288, PubMed:24351972, PubMed:24591628, PubMed:28219928, PubMed:20354224, PubMed:26956484). CRAC channels are the main pathway for Ca(2+) influx in T-cells and promote the immune response to pathogens by activating the transcription factor NFAT (PubMed:16582901). Plays a prominent role in Ca(2+) influx at the basolateral membrane of mammary epithelial cells independently of the Ca(2+) content of endoplasmic reticulum or Golgi stores. May mediate transepithelial transport of large quantities of Ca(2+) for milk secretion. Interacts with STIM1 and STIM2; this regulates channel activity (PubMed:17905723, PubMed:19249086, PubMed:24351972, PubMed:28219928, PubMed:27185316, PubMed:30481768). Interacts with CALM; this may displace STIM1 and STIM2 and might thereby modulate channel activity (PubMed:23109337). 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 STIM1 at low concentration of Ca(2+), the complex dissociates at elevated Ca(2+) concentrations. Interacts with ASPH (isoform 8) (PubMed:22586105). Interacts with SLC35G1 (PubMed:22084111). Interacts with UBQLN1 (PubMed:23307288). Interacts with ADCY8; interaction is calcium store depletion independent; interaction occurs in membrane raft; interaction increases markedly after store depletion; positively regulates SOCE-induced adenylate cyclase activity; contributes to the targeting of ADCY8 to discrete regions of the plasma membrane that are shielded from other calcium events (PubMed:22494970). Interacts with EFHB; the interaction takes place upon Ca(2+)-store depletion (PubMed:30481768). Interacts (via N- and C-termini) with ATP2C2 (via N-terminus); this interaction regulates Ca(2+) influx at the plasma membrane.

EXTERNAL LINKS

ORAI1

Mutations

Mutation(s) distribution

Mutations table