Tethering protein that sequesters GLUT4-containing vesicles in the cytoplasm in the absence of insulin. Modulates the amount of GLUT4 that is available at the cell surface (By similarity). Enhances VCP methylation catalyzed by VCPKMT.
Subcellular locations: Endomembrane system, Endoplasmic reticulum-Golgi intermediate compartment membrane, Cytoplasm, Nucleus
Ubiquitous. Highly expressed in testis, heart, skeletal muscle and pancreas.