Plays a role in the reduction of telomerase activity during differentiation of embryonic stem cells by binding to the core promoter of TERT and controlling its down-regulation. Interacts with PPP1CA and NCOA5. Forms a complex with ILF2, ILF3, KHDRBS1, RBMX, NCOA5 and PPP1CA (By similarity). Migrates to nucleolar caps upon blockage of transcription. Expressed in neuronal, neuroblastoma and embryonic kidney cell lines (at protein level).