May play a role during myoblast fusion. Homodimer. Interacts with myosin (By similarity). Distributed in the transverse tubules and near the junctional sarcoplasmic reticulum. Detected along the Z-lines and M-lines in cardiomyocytes. Membrane-associated (By similarity). Localizes to the centrosomes in a microtubule- dependent manner (By similarity). Belongs to the SLMAP family.