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- W3197993362 abstract "The conserved Tweety homolog (TTYH) family consists of three paralogs in vertebrates, displaying a ubiquitous expression pattern. Although considered as ion channels for almost two decades, recent structural and functional analyses refuted this role. Intriguingly, while all paralogs, studied following detergent solubilization, shared a dimeric stoichiometry, their spatial organization differed. Here, we determined the stoichiometry of intact mouse TTYH (mTTYH) complexes in cells. Using cross-linking and single-molecule fluorescence microscopy, we demonstrated that mTTYH1 and mTTYH3 form tetramers at the plasma membrane. Blue-native PAGE and fluorescence-detection size-exclusion chromatography analyses revealed that detergent solubilization results in the dissolution of tetramers into dimers, suggesting a dimer-of-dimers assembly mode. As cross-linking analysis of the soluble extracellular domains also showed tetrameric stoichiometry, we explored the effect of membrane solubilization and disulfide bridges integrity and established their contribution to tetramer stability. Future studies of the native tetrameric TTYH characterized here may illuminate their long-sought cellular function." @default.
- W3197993362 created "2021-09-13" @default.
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- W3197993362 date "2021-09-05" @default.
- W3197993362 modified "2023-09-23" @default.
- W3197993362 title "TTYH family members form tetrameric complexes within the cell membrane" @default.
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- W3197993362 doi "https://doi.org/10.1101/2021.09.05.459021" @default.
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