Myozenins may serve as intracellular binding proteins involved in linking Z-disk proteins such as alpha-actinin, gamma-filamin, TCAP/telethonin, LDB3/ZASP and localizing calcineurin signaling to the sarcomere. Plays an important role in the modulation of calcineurin signaling. May play a role in myofibrillogenesis. Interacts with ACTN2, ACTN3, FLNA, FLNB, FLNC, LDB3, PPP3CA and TCAP. Interacts via its C-terminal region with MYOT. Localized to the nucleus and pseudopodia of undifferentiated cells and detected throughout the myotubes of differentiated cells. Colocalizes with ACTN2, FLNC and MYOT at the Z-lines of skeletal muscle. Expressed primarily in skeletal muscle. Detected at lower levels in heart, prostate and pancreas. Belongs to the myozenin family.