Alpha actinins belong to the spectrin gene superfamily which represents a diverse group of cytoskeletal proteins, including the alpha and beta spectrins and dystrophins. Alpha actinin is an actin-binding protein with multiple roles in different cell types. In nonmuscle cells, the cytoskeletal isoform is found along microfilament bundles and adherens-type junctions, where it is involved in binding actin to the membrane. In contrast, skeletal, cardiac, and smooth muscle isoforms are localized to the Z-disc and analogous dense bodies, where they help anchor the myofibrillar actin filaments. This gene encodes a muscle-specific, alpha actinin isoform that is expressed in both skeletal and cardiac muscles.
Actinin alpha3; actinin, alpha 2; actinin, alpha 3; Actinin-alpha3; ACTN3; alpha-actinin skeletal muscle; Alpha-actinin skeletal muscle isoform 2; Alpha-actinin skeletal muscle isoform 3; Alpha-actinin-2; Alpha-actinin-3; alpha-Actinin3; alphaActinin-3; CMD1AA; F-actin cross-linking protein