Enables identical protein binding activity. Involved in several processes, including auditory receptor cell stereocilium organization; cellular response to mechanical stimulus; and positive regulation of neutrophil migration. Located in stereocilium. Is expressed in several structures, including brain; heart; inner ear; liver; and lung. Human ortholog(s) of this gene implicated in autosomal recessive nonsyndromic deafness 104. Orthologous to human RIPOR2 (RHO family interacting cell polarization regulator 2). [provided by Alliance of Genome Resources, Apr 2022]