Component of the CENPA-NAC (nucleosome-associated) complex; a complex that plays a central role in assembly of kinetochore proteins; mitotic progression and chromosome segregation. The CENPA-NAC complex recruits the CENPA-CAD (nucleosome distal) complex and may be involved in incorporation of newly synthesized CENPA into centromeres. {ECO:0000269|PubMed:16716197}.