POT1 is a component of the telomerase ribonucleoprotein (RNP) complex that is essential for the replication of chromosome termini. It is a component of the double-stranded telomeric DNA-binding TRF1 complex which is involved in the regulation of telomere length by cis-inhibition of telomerase. Pot1 also acts as a single-stranded telomeric DNA-binding protein and thus may act as a downstream effector of the TRF1 complex and may transduce information about telomere maintenance and/or length to the telomere terminus. It binds to two or more telomeric single-stranded 5'-TTAGGG-3' repeats (G-strand) and with high specificity to a minimal telomeric single-stranded 5'-TAGGGTTAG-3' sequence. Its activity is TERT dependent but it does not increase TERT activity.
Protein Aliases: DKFZp586D211; hPot1; POT 1; POT-1; POT1-like telomere end-binding protein; protection of telomeres 1 homolog; Protection of telomeres protein 1
Gene Aliases: CMM10; GLM9; HPOT1; POT1
UniProt ID: (Human) Q9NUX5
Entrez Gene ID: (Human) 25913