Synonyms Endosomal/lysosomal potassium channel TMEM175, hTMEM175, MGC4618 + [2] |
Introduction Proton-activated proton channel that catalyzes proton efflux from endosomes and lysosomes to maintain a steady-state pH (PubMed:35750034, PubMed:35333573). Activated at low pH (under pH 4.6) by luminal side protons: selectively mediates lysosomal proton release from lysosomes, eliciting a proton leak that balances V-ATPase activity to maintain pH homeostasis (PubMed:35750034). Regulation of lumenal pH stability is required for autophagosome-lysosome fusion (PubMed:26317472, PubMed:32267231). May also act as a potassium channel at higher pH, regulating potassium conductance in endosomes and lysosomes (PubMed:26317472, PubMed:28723891, PubMed:32228865, PubMed:32267231, PubMed:33505021). The potassium channel activity is however unclear as it was tested in non-physiological conditions for a lysosomal channel (PubMed:35750034). Constitutes the pore-forming subunit of the lysoK(GF) complex, a complex activated by extracellular growth factors (PubMed:33505021). The lysoK(GF) complex is composed of TMEM175 and AKT (AKT1, AKT2 or AKT3), a major target of growth factor receptors: in the complex, TMEM175 channel is opened by conformational changes by AKT, leading to its activation (PubMed:33505021). The lysoK(GF) complex is required to protect neurons against stress-induced damage (PubMed:33505021). |
Target |
Mechanism TMEM175 inhibitors |
Active Org. |
Originator Org. |
Active Indication |
Inactive Indication- |
Drug Highest PhasePreclinical |
First Approval Ctry. / Loc.- |
First Approval Date20 Jan 1800 |
Target |
Mechanism TMEM175 modulators |
Active Org. |
Originator Org. |
Active Indication |
Inactive Indication- |
Drug Highest PhasePreclinical |
First Approval Ctry. / Loc.- |
First Approval Date20 Jan 1800 |
Target |
Mechanism TMEM175 modulators |
Active Org. Caraway Therapeutics, Inc.Startup [+1] |
Originator Org. |
Active Indication |
Inactive Indication- |
Drug Highest PhasePreclinical |
First Approval Ctry. / Loc.- |
First Approval Date20 Jan 1800 |