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-Structure paper
| タイトル | Cryo-electron microscopy structure of the budding yeast telomerase holoenzyme. |
|---|---|
| ジャーナル・号・ページ | Science, Vol. 391, Issue 6792, Page eadz5344, Year 2026 |
| 掲載日 | 2026年3月26日 |
著者 | Hongmiao Hu / Hannah Neumann / Gabriela M Teplitz / Elsa Franco-Echevarría / Pascal Chartrand / Raymund J Wellinger / Thi Hoang Duong Nguyen / ![]() |
| PubMed 要旨 | Telomerase is a reverse transcriptase that synthesizes telomeric repeats at chromosome ends, safeguarding genome integrity. We present the cryo-electron microscopy structure of the budding yeast ...Telomerase is a reverse transcriptase that synthesizes telomeric repeats at chromosome ends, safeguarding genome integrity. We present the cryo-electron microscopy structure of the budding yeast telomerase, which exhibits substantial divergence from its ciliate and vertebrate counterparts. The structure reveals a stable core formed by telomerase RNA TLC1; the three ever shorter telomere (Est) proteins, Est1, Est2 and Est3; and the Pop1/Pop6/Pop7 complex (Pop1/6/7). TLC1, Est3, and Pop1/6/7 serve critical roles in complex assembly. We identified a zinc finger (ZnF) motif in the telomerase reverse transcriptase (TERT) subunit Est2 that is crucial for telomerase function. Structure prediction suggests the presence of ZnFs in TERT from diverse species. These findings offer insights into the functional organization of yeast telomerase and underscore the evolutionary diversity of telomerase holoenzymes. |
リンク | Science / PubMed:41886584 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.0 - 3.7 Å |
| 構造データ | EMDB-55321, PDB-9swn: EMDB-55322, PDB-9swo: |
| 化合物 | ![]() ChemComp-ZN: ![]() ChemComp-MG: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | RNA BINDING PROTEIN / Telomerase / Telomerase RNA |
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Homo sapiens (ヒト)
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