Anoctamins in epithelial transport

Kunzelmann, Karl and Ousingsawat, Jiraporn and Schreiber, Rainer (2024) Anoctamins in epithelial transport. CELL CALCIUM, 120: 102888. ISSN 0143-4160, 1532-1991

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Abstract

Plasma membrane localized anoctamin 1, 2 and 6 (TMEM16A, B, F) have been examined in great detail with respect to structure and function, but much less is known about the other seven intracellular members of this exciting family of proteins. This is probably due to their limited accessibility in intracellular membranous compartments, such as the endoplasmic reticulum (ER) or endosomes. However, these so-called intracellular anoctamins are also found in the plasma membrane (PM) which adds to the confusion regarding their cellular role. Probably all intracellular anoctamins except of ANO8 operate as intracellular phospholipid (PL) scramblases, allowing for Ca2+-activated, passive transport of phospholipids like phosphatidylserine between both membrane leaflets. Probably all of them also conduct ions, which is probably part of their physiological function. In this brief overview, we summarize key findings on the biological functions of ANO3, 4, 5, 7, 8, 9 and 10 (TMEM16C, D, E, G, H, J, K) that are gradually coming to light. Compartmentalized regulation of intracellular Ca2+ signals, tethering of the ER to specific PM contact sites, and control of intracellular vesicular trafficking appear to be some of the functions of intracellular anoctamins, while loss of function and abnormal expression are the cause for various diseases.

Item Type: Article
Uncontrolled Keywords: K+ CURRENTS; SCRAMBLASE ACTIVITY; POTASSIUM CHANNELS; CL-CHANNEL; CA2+; CALCIUM; CELL; CONDUCTANCE; FAMILY; ER; TMEM16C; TMEM16D; TMEM16E; TMEM16G; TMEM16H; TMEM16J; TMEM16K; ANO3; ANO4; ANO5; ANO7; ANO8; ANO9; ANO10; Dystonia; Chronic kidney disease; Calcium signaling
Subjects: 500 Science > 500 Natural sciences & mathematics
500 Science > 570 Life sciences
Divisions: Biology, Preclinical Medicine > Institut für Physiologie
Biology, Preclinical Medicine > Institut für Physiologie > Prof. Dr. Karl Kunzelmann
Depositing User: Dr. Gernot Deinzer
Date Deposited: 25 Jul 2025 07:51
Last Modified: 25 Jul 2025 07:51
URI: https://pred.uni-regensburg.de/id/eprint/63740

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