CASTOR2
Function
Functions as a negative regulator of the TORC1 signaling pathway through the GATOR complex. As part of homodimers or heterodimers with CASTOR1, directly binds and inhibits the GATOR subcomplex GATOR2 and thereby mTORC1. Does not directly bind arginine, but binding of arginine to CASTOR1 disrupts the interaction of CASTOR2-containing heterodimers with GATOR2 which can in turn activate mTORC1 and the TORC1 signaling pathway.
Sequence Similarities
Belongs to the GATS family.
Tissue Specificity
Widely expressed.
Cellular localization
- Cytoplasm
- Cytosol
Alternative names
GATSL1, GATSL2, CASTOR2, Cytosolic arginine sensor for mTORC1 subunit 2, Cellular arginine sensor for mTORC1 protein 2, GATS-like protein 2