Magnesium Cations Modulate Actin Bundles Formed by α-Actinin.
α-Actinin is an actin-crosslinking protein that influences cytoskeletal organization by forming actin bundles or networks. Divalent cations, such as magnesium cations (Mg2+), promote bundling through counterion condensation. While α-actinin and Mg2+ individually promote actin bundle assembly, their combined effects on...