Contributes to RNA polymerase II transcription regulatory region sequence-specific DNA binding activity. Involved in several processes, including neuroblast migration; positive regulation of mesodermal cell fate specification; and regulation of transcription by RNA polymerase II. Located in nucleus. Part of RNA polymerase II transcription regulator complex. Expressed in several structures, including body ganglion; body wall musculature; male-specific anatomical entity; neurons; and vulval cell. Is an ortholog of human HOXB8 (homeobox B8) and HOXC8 (homeobox C8).