Predicted to enable several functions, including RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; identical protein binding activity; and transcription coactivator activity. Involved in cellular response to organic cyclic compound and negative regulation of transcription by RNA polymerase II. Located in several cellular components, including axon; dendrite; and nucleus. Human ortholog(s) of this gene implicated in methylmalonic acidemia and homocysteinemia cblX type. Orthologous to human HCFC1 (host cell factor C1). [provided by Alliance of Genome Resources, Apr 2022]