May play a role during myoblast fusion. Homodimer (By similarity). Interacts with myosin. Membrane-associated. Distributed in the transverse tubules and near the junctional sarcoplasmic reticulum. Detected along the Z- and M-lines in cardiomyocytes (By similarity). Localizes to the centrosomes in a microtubule- dependent manner (By similarity). Some isoforms exhibit tissue specific expression. Expressed in heart (at protein level). Expressed in heart, skeletal muscle, smooth muscle, kidney, spleen, pancreas and brain. Belongs to the SLMAP family.