Castor1 - cytosolic arginine sensor for mTORC1 subunit 1

Predicted to enable arginine binding activity and identical protein binding activity. Predicted to be involved in cellular response to L-arginine and negative regulation of TORC1 signaling. Predicted to be located in cytoplasm. Predicted to be part of GATOR2 complex. Predicted to be active in cytosol. Is expressed in several structures, including Harderian gland; foregut; genitourinary system; skin; and trigeminal nerve. Orthologous to human CASTOR1 (cytosolic arginine sensor for mTORC1 subunit 1). [provided by Alliance of Genome Resources, Apr 2022]