Calcium-activated chloride channel (CaCC) (PubMed:20056604, PubMed:22178883, PubMed:21984732, PubMed:22946059, PubMed:32487539). Plays a role in transepithelial anion transport and smooth muscle contraction. Required for the normal functioning of the interstitial cells of Cajal (ICCs) which generate electrical pacemaker activity in gastrointestinal smooth muscles. Acts as a major contributor to basal and stimulated chloride conductance in airway epithelial cells and plays an important role in tracheal cartilage development. Required for CFTR activation by enhancing endoplasmic reticulum Ca(2+) store release and is also required for CFTR membrane expression (PubMed:28963502). Required for basal and ATP-dependent mucus secretion in airways and intestine, probably by controlling exocytosis of mucus-filled granules by providing Ca(2+) to an apical signaling compartment (By similarity). Contributes to airway mucus expression induced by interleukins IL3 and IL8 and by the asthma-associated protein CLCA1 and is required for expression of mucin MUC5AC (PubMed:33026825). However, was shown in another study not to be required for MUC5AC expression (PubMed:31732694). Plays a role in the propagation of Ca(2+) waves in Kolliker's organ in the cochlea and contributes to the refinement of auditory brainstem circuitries prior to hearing onset (By similarity). In vomeronasal sensory neurons, modulates spontaneous firing patterns in the absence of stimuli as well as the firing pattern of pheromone-evoked activity (By similarity). Responsible for calcium-activated chloride channel activity in type I taste cells of the vallate papillae (By similarity). Acts as a heat sensor in nociceptive neurons (By similarity). In dorsal root ganglion neurons, plays a role in mediating non-histaminergic Mas-related G-protein coupled receptor (MRGPR)-dependent itching, acting as a downstream effector of MRGPRs (By similarity). In the developing brain, required for the Ca(2+)-dependent process extension of radial glial cells (By similarity). Calcium-activated chloride channel (CaCC). Contributes to calcium-activated chloride secretion in human sweat gland epithelial cells. Shows increased basal chloride permeability and decreased Ca(2+)-induced chloride permeability. Calcium-activated chloride channel (CaCC). Shows increased sensitivity to intracellular Ca(2+). ATP and calmodulin are essential for its activation. Channel activity is inhibited by CFTR protein and by chloride inhibitors such as niflumic acid (NFA) and 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid (DIDS). Activated by heat with activation seen at temperatures above 44 degrees Celsius (By similarity). Activated by BDNF in radial glial cells (By similarity). Homodimer (PubMed:21056985, PubMed:28559167). Interacts with CFTR (PubMed:22178883, PubMed:28963502). Interacts with TRPV4 (By similarity). In differentiating airway epithelial cells, predominantly intracellular at day 0 but is apically localized by day 30. Expressed in the presynapse of retinal neurons (By similarity). Expressed in nasal epithelial cells (at protein level) (PubMed:32487539). In the kidney, expressed in the collecting duct (at protein level) (PubMed:24913262). Broadly expressed with higher levels in liver, skeletal muscle and gastrointestinal muscles (PubMed:16906560, PubMed:15215166). Expressed in eccrine sweat glands (PubMed:25220078). In airway epithelial cells, highly expressed during cell proliferation with levels decreasing as cell differentiation progresses (at protein level). By IL13 (PubMed:33026825). By IL4, likely as a result of IL4-induced cell proliferation (PubMed:31732694). By wounding in airway epithelial cells with levels decreasing significantly during the healing process (PubMed:31732694). The region spanning the fifth and sixth transmembrane domains probably forms the pore-forming region. Defects in ANO1 may be the cause of a disorder characterized by impaired intestinal peristalsis, intestinal pneumatosis, microalbuminuria and dysmorphic features in neonates. The defective ANO1 protein is truncated, accumulates intracellularly and is non-functional, resulting in the absence of Ca(2+)-activated chloride currents and secondary CFTR dysfunction. 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.