Enables actin filament binding activity. Predicted to be involved in several processes, including homophilic cell adhesion via plasma membrane adhesion molecules; neuron development; and regulation of cytoskeleton organization. Predicted to act upstream of or within response to bacterium. Located in Z disc and focal adhesion. Human ortholog(s) of this gene implicated in dilated cardiomyopathy 1CC and hypertrophic cardiomyopathy 20. Orthologous to human NEXN (nexilin F-actin binding protein). [provided by Alliance of Genome Resources, Apr 2022]