Native doublet microtubules from Tetrahymena thermophila reveal the importance of outer junction proteins.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
15 04 2023
15 04 2023
Historique:
received:
30
09
2022
accepted:
03
04
2023
medline:
18
4
2023
entrez:
15
4
2023
pubmed:
16
4
2023
Statut:
epublish
Résumé
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.
Identifiants
pubmed: 37061538
doi: 10.1038/s41467-023-37868-0
pii: 10.1038/s41467-023-37868-0
pmc: PMC10105768
doi:
Substances chimiques
Microtubule Proteins
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2168Subventions
Organisme : NICHD NIH HHS
ID : R01 HD085901
Pays : United States
Informations de copyright
© 2023. The Author(s).
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