Involved in negative regulation of transcription by RNA polymerase II and positive regulation of transcription by RNA polymerase II. Located in nucleus and perinuclear region of cytoplasm. Is expressed in several structures, including brain; cranial ganglion; limb mesenchyme; tongue muscle; and vertebral axis musculature. Orthologous to human MOSPD1 (motile sperm domain containing 1). [provided by Alliance of Genome Resources, Apr 2022]