Binds specifically single-stranded telomeric DNA with weak affinity (PubMed:31134349). Has probably no function in the regulation of telomere length (PubMed:31134349). Expressed at extremely low levels at the limit of detection. No visible phenotype under normal growth conditions. POT1C is a highly divergent POT1 gene, which harbors multiple deletions within its gene body, and insertions of transposable elements within its promoter that probably silence permanentely the gene (PubMed:31134349). Therefore, it is probably a non-functional gene (PubMed:31134349). Belongs to the telombin family. Intron retention.