The structure of TPP1's oligonucleotide binding fold contains features that are particularly characteristic of TEBPβ. When the POT1–TPP1 complex is bound to telomeric DNA, it does not inhibit telomerase activity, as other telomere binding proteins do. Instead, the presence of POT1–TPP1 unexpectedly stimulates telomerase activity and processivity.
- Huawei Xin
- Dan Liu
- Zhou Songyang