Calcium-regulated, actin-modulating protein that binds to the plus (or barbed) ends of actin monomers or filaments, preventing monomer exchange (end-blocking or capping). It can promote the assembly of monomers into filaments (nucleation) as well as sever filaments already formed. Plays a role in ciliogenesis. Binds to actin and to fibronectin. Identified in a complex composed of ACTA1, COBL, GSN AND TMSB4X. Interacts with the inactive form of EIF2AK2/PKR (By similarity). Phagocytic cells, platelets, fibroblasts, nonmuscle cells, smooth and skeletal muscle cells. Phosphorylation on Tyr-86, Tyr-409, Tyr-465, Tyr-603 and Tyr-651 in vitro is induced in presence of phospholipids. The disease is caused by variants affecting the gene represented in this entry. Belongs to the villin/gelsolin family. Gelsolin entry