The PIEZO protein family was first described in animals where these mechanosensitive calcium channels perform numerous essential functions, including the perception of light touch, shear, and compressive forces. PIEZO homologs are present in most eukaryotic lineages and recently we reported that two PIEZO homologs from moss localize to the vacuolar membrane and modulate its morphology in tip-growing caulonemal cells. Here we show that predicted structures of both PIEZO1 and PIEZO2 are very similar to that of mouse Piezo2. Furthermore, we show that both moss genes are ubiquitously expressed in moss vegetative tissues and that they are not required for normal vacuolar pH or intracellular osmotic potential. These results suggest that moss PIEZO proteins are widely expressed mechanosensory calcium channels that serve a signaling rather than maintenance role in vacuoles.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8920221PMC
http://dx.doi.org/10.1080/15592324.2021.2015893DOI Listing

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