Inhibits amyloid precursor protein processing, probably by blocking BACE1 activity . Enhances trafficking of the glutamate transporter SLC1A1/EAAC1 from the endoplasmic reticulum to the cell surface (By similarity). Plays a role in the translocation of SLC2A4/GLUT4 from intracellular membranes to the cell membrane which facilitates the uptake of glucose into the cell (By similarity).
Subcellular locations: Endoplasmic reticulum membrane, Sarcoplasmic reticulum membrane, Cell membrane, Cell membrane, Sarcolemma, Cell membrane, Sarcolemma, T-tubule, Cytoplasm, Myofibril, Sarcomere, Z line, Cytoplasm, Cytoskeleton
Localizes to intermediate filaments in mononucleated myoblasts and to Z lines in mature myotubes.
Highly expressed in skeletal muscle.