Function
SH3BP4 antibody may play a role in the internalization of the transferrin receptor at the plasma membrane by regulating clathrin-mediated endocytosis in a cargo-specific manner. Alternatively, it may act as a negative regulator of amino acid-induced TOR signaling by inhibiting the formation of active Rag GTPase complexes. SH3BP4 preferentially binds to inactive Rag GTPase complexes, preventing their interaction with the mTORC1 complex, thereby inhibiting its relocalization to lysosomes and subsequent activation. This mechanism potentially indirectly regulates cell growth, proliferation, and autophagy.