Enables actin filament binding activity; protein heterodimerization activity; and protein homodimerization activity. Predicted to be involved in actin filament organization; muscle contraction; and regulation of ATPase activity. Located in actin cytoskeleton. Human ortholog(s) of this gene implicated in distal arthrogryposis type 1A and nemaline myopathy 4. Orthologous to human TPM2 (tropomyosin 2). [provided by Alliance of Genome Resources, Apr 2022]