Small-conductance calcium-activated nonselective cation (SCAN) channel which acts as a regulator of phospholipid scrambling in platelets and osteoblasts. Phospholipid scrambling results in surface exposure of phosphatidylserine which in platelets is essential to trigger the clotting system whereas in osteoblasts is essential for the deposition of hydroxyapatite during bone mineralization. Has calcium-dependent phospholipid scramblase activity; scrambles phosphatidylserine, phosphatidylcholine and galactosylceramide (By similarity). Can generate outwardly rectifying chloride channel currents in airway epithelial cells and Jurkat T lymphocytes. (Microbial infection) Upon SARS coronavirus-2/SARS-CoV-2 infection, is activated by spike protein which increases the amplitude of spontaneous Ca(2+) signals and is required for spike-mediated syncytia. a 1,2-diacyl-sn-glycero-3-phospho-L-serine(in) = a 1,2-diacyl-sn-glycero-3-phospho-L-serine(out) a beta-D-galactosyl-(1<->1')-N-acylsphing-4-enine(out) = a beta-D-galactosyl-(1<->1')-N-acylsphing-4-enine(in) a 1,2-diacyl-sn-glycero-3-phosphocholine(in) = a 1,2-diacyl-sn-glycero-3-phosphocholine(out) Exhibits synergistic gating by Ca(2+) and voltage (By similarity). Inhibited by some non-specific cation channel blockers such as: ruthenium red, 2-aminoethyl diphenylborinate (2APB), gadolinium and cadmium ions (By similarity). (Microbial infection) Activated by SARS coronavirus-2/SARS-CoV-2 spike protein. Homodimer. Shows an intracellular localization according to PubMed:22075693. Expressed in embryonic stem cell, fetal liver, retina, chronic myologenous leukemia and intestinal cancer. (Microbial infection) Expression is induced by SARS coronavirus-2/SARS-CoV-2 spike protein. The disease is caused by variants affecting the gene represented in this entry. The term 'anoctamin' was coined because these channels are anion selective and are predicted to have eight (OCT) transmembrane segments. There is some dissatisfaction in the field with the Ano nomenclature because it is not certain that all the members of this family are anion channels or have the 8-transmembrane topology. Belongs to the anoctamin family. Contains ten transmembrane regions, not eight as predicted.