Lysosomal cholesterol signaling protein

UniProtKB accession:  Q7Z3F1

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UniProtKB description:  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 disruption of the interaction between the GATOR1 and KICSTOR complexes and promotion of mTORC1 signaling (PubMed:36007018, PubMed:39358511). Upon cholesterol starvation, GPR155/LYCHOS is unable to perturb the association between GATOR1 and KICSTOR, leading to mTORC1 signaling inhibition (PubMed:36007018). Binds indole-3-acetic acid and may play a role in tryptophan metabolism (PubMed:39358511).