Small-conductance calcium-activated nonselective cation (SCAN) channel which acts as a regulator of phospholipid scrambling in platelets, osteoblasts and fetal thymocytes. 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. Can generate outwardly rectifying chloride channel currents in airway epithelial cells and Jurkat T lymphocytes. 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. Inhibited by some non-specific cation channel blockers such as: ruthenium red, 2-aminoethyl diphenylborinate (2APB), gadolinium and cadmium ions. Homodimer. Shows an intracellular localization. Predominant expression seen in epithelial tissues. Also found in skeletal system where it is primarily expressed in osteoblasts. At 14.5 dpc, expressed in lung epithelium and mesenchyme. At 16.5 dpc, expressed in esophageal epithelium and mesenchyme. In the caudal digestive tract, detected in small intestine epithelium at 14.5 dpc. Also detected at 14.5 dpc in epithelium and mesenchyme of trachea, ovary, kidney and stomach. In the developing skeleton, expressed in developing rib perichondria at 14.5 dpc. Also expressed in the neural tube and dorsal root ganglia at 14.5 dpc. In developing skin, expression is restricted to basal layers of the epidermis at 16.5 dpc. Mice are viable and fertile, and display no major morphological defects. They exhibit deficiencies in Ca(2+)-dependent phospholipid scramblase activity in platelets and defects in blood coagulation (PubMed:23021219). They also show reduced skeleton size and skeletal deformities. 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.