The function of Ensembl gene identifier ENSG00000148180 (GSN, gelsolin) is as follows. 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 (PubMed:19666512). Plays a role in ciliogenesis (PubMed:20393563). {ECO:0000269|PubMed:19666512, ECO:0000269|PubMed:20393563}.