Component of the CENPA-HI complex; a centromeric complex involved in assembly of kinetochore proteins; mitotic progression and chromosome segregation. Required for the localization of CENPC but not CENPA to the centromere. It however may be involved in incorporation of newly synthesized CENPA into centromeres via its interaction with the CENPA-NAC complex. {ECO:0000269|PubMed:11500386}.