Enables actin binding activity. Predicted to be involved in several processes, including cellular response to testosterone stimulus; epithelial cell differentiation; and positive regulation of macromolecule metabolic process. Predicted to act upstream of or within positive regulation of podosome assembly. Located in several cellular components, including T-tubule; filopodium membrane; and secretory granule membrane. Human ortholog(s) of this gene implicated in immunodeficiency 50. Orthologous to human MSN (moesin). [provided by Alliance of Genome Resources, Apr 2022]