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-Structure paper
| タイトル | Structural insights into the interplay between microtubule polymerases, γ-tubulin complexes and their receptors. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 402, Year 2025 |
| 掲載日 | 2025年1月5日 |
著者 | Anjun Zheng / Bram J A Vermeulen / Martin Würtz / Annett Neuner / Nicole Lübbehusen / Matthias P Mayer / Elmar Schiebel / Stefan Pfeffer / ![]() |
| PubMed 要旨 | The γ-tubulin ring complex (γ-TuRC) is a structural template for controlled nucleation of microtubules from α/β-tubulin heterodimers. At the cytoplasmic side of the yeast spindle pole body, the ...The γ-tubulin ring complex (γ-TuRC) is a structural template for controlled nucleation of microtubules from α/β-tubulin heterodimers. At the cytoplasmic side of the yeast spindle pole body, the CM1-containing receptor protein Spc72 promotes γ-TuRC assembly from seven γ-tubulin small complexes (γ-TuSCs) and recruits the microtubule polymerase Stu2, yet their molecular interplay remains unclear. Here, we determine the cryo-EM structure of the Candida albicans cytoplasmic nucleation unit at 3.6 Å resolution, revealing how the γ-TuRC is assembled and conformationally primed for microtubule nucleation by the dimerised Spc72 CM1 motif. Two coiled-coil regions of Spc72 interact with the conserved C-terminal α-helix of Stu2 and thereby position the α/β-tubulin-binding TOG domains of Stu2 in the vicinity of the microtubule assembly site. Collectively, we reveal the function of CM1 motifs in γ-TuSC oligomerisation and the recruitment of microtubule polymerases to the γ-TuRC. |
リンク | Nat Commun / PubMed:39757296 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.6 - 8.2 Å |
| 構造データ | EMDB-51971, PDB-9h9q: EMDB-51972, PDB-9h9r: ![]() PDB-9h9p: |
| 化合物 | ![]() ChemComp-GDP: |
| 由来 |
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キーワード | CELL CYCLE / cytoskeleton / microtubule / microtubule nucleation / complex / template / cap / gamma-tubulin / gamma-tubulin ring complex / CDK5RAP2 / Homo / sapiens / GCP6 / GCP2 / gamma-tubulin complex protein / MZT2 / Mozart / Mozart2 / module / CM1 / CM1 motif / CEP215 / gamma-tubulin small complex / Spc72 / GCP3 / Spc97 / Spc98 / Candida / albicans / gamma-TuRC / gamma-TuSC / yeast / fungi |
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candida albicans (酵母)
homo sapiens (ヒト)
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