GPR155
Function
Cholesterol-binding protein that acts as a regulator of mTORC1 signaling pathway (PubMed:36007018). Acts as a sensor of cholesterol to signal cholesterol sufficiency to mTORC1: in presence of cholesterol, binds cholesterol, leading to disrupt interaction between the GATOR1 and KICSTOR complexes and promote mTORC1 signaling (PubMed:36007018). Upon cholesterol starvation, GPR155/LYCHOS is unable to perturb the association between GATOR1 and KICSTOR, leading to mTORC1 signaling inhibition (PubMed:36007018).
Cellular localization
- Lysosome membrane
- Multi-pass membrane protein
Alternative names
PGR22, GPR155, Lysosomal cholesterol signaling protein, LYCHOS, G-protein coupled receptor PGR22