4.6 Article

Vertebrate Dynein-f depends on Wdr78 for axonemal localization and is essential for ciliary beat

Journal

JOURNAL OF MOLECULAR CELL BIOLOGY
Volume 11, Issue 5, Pages 383-394

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/jmcb/mjy043

Keywords

axonemal dynein; Dynein-f; IC138; motile cilium; primary ciliary dyskinesia; Wdr78; Dnah2

Categories

Funding

  1. National Natural Science Foundation of China (NSFC) [31330045]
  2. National Key R&D Program of China [2017YFA0503500]
  3. Chinese Academy of Sciences [XDB19020000]
  4. NSFC [31471323]

Ask authors/readers for more resources

Motile cilia and flagella are microtubule-based organelles important for cell locomotion and extracellular liquid flow through beating. Although axonenal dyneins that drive ciliary beat have been extensively studied in unicellular Chlamydomonas, to what extent such knowledge can be applied to vertebrate is poorly known. In Chlamydomonas, Dynein-f controls flagellar waveforms but is dispensable for beating. The flagellar assembly of its heavy chains (HCs) requires its intermediate chain (IC) IC140 but not IC138. Here we show that, unlike its Chlamydomonas counterpart, vertebrate Dynein-f is essential for ciliary beat. We confirmed that Wdr78 is the vertebrate orthologue of IC138. Wdr78 associated with Dynein-f subunits such as Dnah2 (a HC) and Wdr63 (IC140 orthologue). It was expressed as a motile cilium-specific protein in mammalian cells. Depletion of Wdr78 or Dnah2 by RNAi paralyzed mouse ependymal cilia. Zebrafish Wdr78 morphants displayed ciliopathy-related phenotypes, such as curved bodies, hydrocephalus, abnormal otolith, randomized left-right asymmetry, and pronephric cysts, accompanied with paralyzed pronephric cilia. Furthermore, all the HCs and ICs of Dynein-f failed to localize in the Wdr78-depleted mouse ependymal cilia. Therefore, both the functions and subunit dependency of Dynein-f are altered in evolution, probably to comply with ciliary roles in higher organisms.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available