Is predicted to encode a protein with the following domains: Histone deacetylase family; Histone deacetylase domain; Ureohydrolase domain superfamily; and Histone deacetylase domain superfamily. Is an ortholog of C. elegans hda-4. In C. elegans, hda-4 is involved in negative regulation of transcription by RNA polymerase II; receptor guanylyl cyclase signaling pathway; and regulation of neuron differentiation.