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-Structure paper
| タイトル | Structure and assembly of the A-C linker connecting microtubule triplets in centrioles. |
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| ジャーナル・号・ページ | Sci Adv, Vol. 11, Issue 41, Page eady3689, Year 2025 |
| 掲載日 | 2025年10月10日 |
著者 | Bin Cai / Jingwei Xu / Erik H Collet / Ellen Aarts / Leo Luo / Alexander Leitner / Takashi Ishikawa / Pedro Beltrao / Chad G Pearson / Martin Pilhofer / Michal Wieczorek / ![]() |
| PubMed 要旨 | Centriole assembly involves the coordination of centriolar modules. One module is the A-C linker, an enigmatic protein assembly connecting the A-microtubule of one microtubule triplet to the C- ...Centriole assembly involves the coordination of centriolar modules. One module is the A-C linker, an enigmatic protein assembly connecting the A-microtubule of one microtubule triplet to the C-microtubule of the neighboring triplet. Here, we integrated biochemistry, multiscale cryo-electron microscopy, and AlphaFold modeling to investigate the architecture of the centriole. Using an improved centriole isolation method, we determined the structure of the A-C linker bound to microtubule triplets, which revealed how the A-C linker cross-links microtubules and integrates with the B-C junction. We found marked changes in the structure and composition of the A-C linker that correlate with the presence of other centriolar modules, including the pinhead, cartwheel, and inner scaffold. Our findings show that the A-C linker is a highly integrated component of the centriole whose polymorphism may orchestrate the assembly of spatially distinct centriolar modules, and provide a framework for dissecting the biology of centrioles. |
リンク | Sci Adv / PubMed:41061066 / PubMed Central |
| 手法 | EM (単粒子) / EM (サブトモグラム平均) / EM (トモグラフィー) |
| 解像度 | 3.6 - 30.0 Å |
| 構造データ | EMDB-53467: Composite map of proximal A-C linker of Tetrahymena centriole EMDB-53471: Composite map of proximal A-C linker of Tetrahymena centriole ![]() EMDB-53975: A-link map of Tetrahymena proximal A-C linker ![]() EMDB-53977: A-link and A-microtubule of Tetrahymena proximal A-C linker ![]() EMDB-53978: C-link of Tetrahymena proximal A-C linker ![]() EMDB-53979: A-microtubule associated with Tetrahymena proximal A-C linker ![]() EMDB-53980: A05-A09 protofilaments of A-microtubule associated with Tetrahymena proximal A-C linker ![]() EMDB-53981: A-B inner junction of Tetrahymena centriole triplet ![]() EMDB-53982: B-C inner junction of Tetrahymena centriole triplet, focusing on POC1 ![]() EMDB-53983: B-C inner junction of Tetrahymena centriole triplet, focusing on WD40 domain ![]() EMDB-53984: A-link and A-microtubule of Tetrahymena transitional A-C linker ![]() EMDB-53985: C-link of Tetrahymena transitional A-C linker ![]() EMDB-53986: C-link and C-microtubule of Tetrahymena transitional A-C linker ![]() EMDB-53987: Composite map of Tetrahymena transitional A-C linker ![]() EMDB-54008: Consensus refinement of Tetrahymena transitional A-C linker ![]() EMDB-54049: Consensus refinement of Tetrahymena proximal A-C linker ![]() EMDB-54239: Cryo sub-tomogram average of A-C linker from isolated Tetrahymena centrioles (Class01) ![]() EMDB-54240: Cryo sub-tomogram average of A-C linker from isolated Tetrahymena centrioles (Class02) ![]() EMDB-54241: Cryo sub-tomogram average of A-C linker from FIB-milled Tetrahymena cells ![]() EMDB-54242: Cryo-tomogram of FIB-milled Tetrahymena cell ![]() EMDB-54243: Cryo-tomogram of isolated centriole from Tetrahymena cells ![]() EMDB-54244: Cryo-tomogram of isolated oral apparatus from Tetrahymena cells |
| 由来 |
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キーワード | STRUCTURAL PROTEIN / centriole / basal body / centrosome |
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