Abstract：
:Calcium (Ca(2+))-activated chloride channels are fundamental mediators in numerous physiological processes including transepithelial secretion, cardiac and neuronal excitation, sensory transduction, smooth muscle contraction and fertilization. Despite their physiological importance, their molecular identity has remained largely unknown. Here we show that transmembrane protein 16A (TMEM16A, which we also call anoctamin 1 (ANO1)) is a bona fide Ca(2+)-activated chloride channel that is activated by intracellular Ca(2+) and Ca(2+)-mobilizing stimuli. With eight putative transmembrane domains and no apparent similarity to previously characterized channels, ANO1 defines a new family of ionic channels. The biophysical properties as well as the pharmacological profile of ANO1 are in full agreement with native Ca(2+)-activated chloride currents. ANO1 is expressed in various secretory epithelia, the retina and sensory neurons. Furthermore, knockdown of mouse Ano1 markedly reduced native Ca(2+)-activated chloride currents as well as saliva production in mice. We conclude that ANO1 is a candidate Ca(2+)-activated chloride channel that mediates receptor-activated chloride currents in diverse physiological processes.
journal_name
Naturejournal_title
Natureauthors
Yang YD,Cho H,Koo JY,Tak MH,Cho Y,Shim WS,Park SP,Lee J,Lee B,Kim BM,Raouf R,Shin YK,Oh Udoi
10.1038/nature07313subject
Has Abstractpub_date
2008-10-30 00:00:00pages
1210-5issue
7217eissn
0028-0836issn
1476-4687pii
nature07313journal_volume
455pub_type
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