Telomerase has both a protein component and an RNA component. The RNA component acts as a template for the addition of telomeric repeat sequences.
germline mutations in
References
Marrone A, Walne A, Dokal I. Dyskeratosis congenita: telomerase, telomeres and anticipation. Curr Opin Genet Dev. 2005 Jun;15(3):249-57. PMID: #15917199#