TBC1 domain family member 1 (TBC1D1)

TBC1 domain family member 1 (TBC1D1) is a protein encoded by the *TBC1D1* gene, and is the founder of the TBC1 domain family of Rab-GTPase-activating proteins. TBC1D1 is primarily expressed in skeletal muscle, where it regulates glucose uptake by modulating the trafficking and translocation of GLUT4 vesicles in response to insulin and physical contraction. It acts downstream of kinases such as Akt and AMPK, with multiple phosphorylation sites integrating metabolic signals, and is a key convergence point between insulin- and exercise-stimulated glucose uptake. TBC1D1 is also implicated in fatty acid metabolism and cell differentiation, with additional roles in immune cell function and tumor microenvironment regulation, notably in glioma. Mutations or altered expression of TBC1D1 are associated with obesity, insulin resistance, and certain cancers, making it a potential biomarker and target for metabolic and oncologic therapies[1][3][4][5][6][7].

Other names

TBC1 domain family member 1TBC1D1KIAA1108TBC1TBCTre-2/USP6, Bub2, cdc16 domain family member 1

Potential agents would likely act by - Modulating TBC1D1 phosphorylation (via Akt, AMPK, or similar kinases)[3][4] - Regulating GTPase activity and GLUT4 vesicle trafficking[3] No direct clinical drugs identified; research is underway for targeting AKT/AMPK-TBC1D1-GLUT4 pathways for metabolic disease[3].