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-Structure paper
タイトル | Native doublet microtubules from Tetrahymena thermophila reveal the importance of outer junction proteins. |
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ジャーナル・号・ページ | Nat Commun, Vol. 14, Issue 1, Page 2168, Year 2023 |
掲載日 | 2023年4月15日 |
著者 | Shintaroh Kubo / Corbin S Black / Ewa Joachimiak / Shun Kai Yang / Thibault Legal / Katya Peri / Ahmad Abdelzaher Zaki Khalifa / Avrin Ghanaeian / Caitlyn L McCafferty / Melissa Valente-Paterno / Chelsea De Bellis / Phuong M Huynh / Zhe Fan / Edward M Marcotte / Dorota Wloga / Khanh Huy Bui / |
PubMed 要旨 | Cilia are ubiquitous eukaryotic organelles responsible for cellular motility and sensory functions. The ciliary axoneme is a microtubule-based cytoskeleton consisting of two central singlets and nine ...Cilia are ubiquitous eukaryotic organelles responsible for cellular motility and sensory functions. The ciliary axoneme is a microtubule-based cytoskeleton consisting of two central singlets and nine outer doublet microtubules. Cryo-electron microscopy-based studies have revealed a complex network inside the lumen of both tubules composed of microtubule-inner proteins (MIPs). However, the functions of most MIPs remain unknown. Here, we present single-particle cryo-EM-based analyses of the Tetrahymena thermophila native doublet microtubule and identify 42 MIPs. These data shed light on the evolutionarily conserved and diversified roles of MIPs. In addition, we identified MIPs potentially responsible for the assembly and stability of the doublet outer junction. Knockout of the evolutionarily conserved outer junction component CFAP77 moderately diminishes Tetrahymena swimming speed and beat frequency, indicating the important role of CFAP77 and outer junction stability in cilia beating generation and/or regulation. |
リンク | Nat Commun / PubMed:37061538 / PubMed Central |
手法 | EM (サブトモグラム平均) / EM (単粒子) |
解像度 | 3.7 - 22.0 Å |
構造データ | EMDB-29666: 96-nm repeat unit of intact doublet microtubule from Tetrahymena thermophila CFAP77AB-KO mutant EMDB-29667: 96-nm repeat unit of intact doublet microtubule from Tetrahymena thermophila strain CU428 EMDB-29685, PDB-8g2z: EMDB-29692, PDB-8g3d: EMDB-29693: 96-nm doublet microtubule from combined Tetrahymena thermophila strains CU428 and K40R |
化合物 | ChemComp-GTP: ChemComp-MG: ChemComp-GDP: |
由来 |
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キーワード | STRUCTURAL PROTEIN / Cilia / Axoneme / Doublet Microtubule / Microtubule Inner Protein |