+検索条件
-Structure paper
タイトル | Structural basis of human telomerase recruitment by TPP1-POT1. |
---|---|
ジャーナル・号・ページ | Science, Vol. 375, Issue 6585, Page 1173-1176, Year 2022 |
掲載日 | 2022年3月11日 |
著者 | Zala Sekne / George E Ghanim / Anne-Marie M van Roon / Thi Hoang Duong Nguyen / |
PubMed 要旨 | Telomerase maintains genome stability by extending the 3' telomeric repeats at eukaryotic chromosome ends, thereby counterbalancing progressive loss caused by incomplete genome replication. In ...Telomerase maintains genome stability by extending the 3' telomeric repeats at eukaryotic chromosome ends, thereby counterbalancing progressive loss caused by incomplete genome replication. In mammals, telomerase recruitment to telomeres is mediated by TPP1, which assembles as a heterodimer with POT1. We report structures of DNA-bound telomerase in complex with TPP1 and with TPP1-POT1 at 3.2- and 3.9-angstrom resolution, respectively. Our structures define interactions between telomerase and TPP1-POT1 that are crucial for telomerase recruitment to telomeres. The presence of TPP1-POT1 stabilizes the DNA, revealing an unexpected path by which DNA exits the telomerase active site and a DNA anchor site on telomerase that is important for telomerase processivity. Our findings rationalize extensive prior genetic and biochemical findings and provide a framework for future mechanistic work on telomerase regulation. |
リンク | Science / PubMed:35201900 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.2 - 3.9 Å |
構造データ | EMDB-14196, PDB-7qxa: EMDB-14197, PDB-7qxb: EMDB-14198: EMDB-14199: |
由来 |
|
キーワード | RNA BINDING PROTEIN (RNA結合タンパク質) / Reverse transcriptase (逆転写酵素) / ribonucleoprotein (核タンパク質) / telomerase (テロメラーゼ) / telomere (テロメア) / DNA BINDING PROTEIN (DNA結合タンパク質) |