May bind and stabilize microtubules during myotubes formation. Homooligomer and heterooligomer. Interacts with TRIM63 and probably with TRIM55 (By similarity). Interacts with tubulin. Associates with microtubules. Localizes to the Z-lines in skeletal muscles. Selectively expressed in heart and skeletal muscle (at protein level). Also detected in lung and brain at much lower level. At 8.5 dpc expressed in the developing cardiac region. At 10.5 dpc expression is restricted to the cardiac region and myotome of the somites. Pre-natal expression is muscle-specific.