A structural constituent of postsynaptic actin cytoskeleton. Involved in response to calcium ion and response to mechanical stimulus. Is active in postsynaptic actin cytoskeleton and presynaptic actin cytoskeleton. Human ortholog(s) of this gene implicated in Baraitser-Winter syndrome and autosomal dominant nonsyndromic deafness 20. Orthologous to human ACTG1 (actin gamma 1). [provided by Alliance of Genome Resources, Apr 2022]