CTC1 is one of the three components of the CST complex that assists Shelterin to protect the ends of telomeres from attack by DNA-repair mechanisms. This family largely represents sequences from plants species.

1: Conserved telomere maintenance component 1 interacts with STN1 and maintains chromosome ends in higher eukaryotes. Surovtseva YV, Churikov D, Boltz KA, Song X, Lamb JC, Warrington R, Leehy K, Heacock M, Price CM, Shippen DE; Mol Cell. 2009;36:207-218. PMID:19854131

2: Shelterin: the protein complex that shapes and safeguards human telomeres. de Lange T; Genes Dev. 2005;19:2100-2110. PMID:16166375