Enables actin binding activity. Involved in apical protein localization; barbed-end actin filament capping; and cellular response to platelet-derived growth factor stimulus. Located in several cellular components, including T-tubule; cleavage furrow; and midbody. Human ortholog(s) of this gene implicated in autosomal recessive nonsyndromic deafness 24. Orthologous to human RDX (radixin). [provided by Alliance of Genome Resources, Apr 2022]