Enables actin binding activity. Involved in several processes, including cellular response to cadmium ion; oligodendrocyte development; and phosphatidylinositol-mediated signaling. Located in several cellular components, including myelin sheath; perinuclear region of cytoplasm; and ruffle. Part of protein-containing complex. Biomarker of hypothyroidism and lung disease. Human ortholog(s) of this gene implicated in Finnish type amyloidosis. Orthologous to human GSN (gelsolin). [provided by Alliance of Genome Resources, Apr 2022]