Disease-associated mutations in WDR34 lead to diverse impacts on the assembly and function of dynein-2

Caroline Shak, Laura Vuolo, Borhan Uddin, Yohei Katoh, Tom Brown, Aakash G Mukhopadhyay, Kate Heesom, Anthony J Roberts, Nicola Stevenson, Kazuhisa Nakayama, David J Stephens*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)
38 Downloads (Pure)

Abstract

The primary cilium is a sensory organelle, receiving signals from the external environment and relaying them into the cell. Mutations in proteins required for transport in the primary cilium result in ciliopathies, a group of genetic disorders that commonly lead to the malformation of organs such as the kidney, liver and eyes and skeletal dysplasias. Motor proteins dynein-2 and kinesin-2 mediate retrograde and anterograde transport respectively in the cilium. WDR34, a dynein-2 intermediate chain, is required for the maintenance of cilia function. Here, we investigated WDR34 mutations identified in Jeune syndrome, short-rib polydactyly syndrome or asphyxiating thoracic dysplasia patients. There is a poor correlation between genotype and phenotype in these cases making diagnosis and treatment highly complex. We set out to define the biological impacts on cilia formation and function of WDR34 mutations by stably expressing the mutant proteins in WDR34 knockout cells. WDR34 mutations led to different spectrums of phenotypes. Quantitative proteomics demonstrated changes in dynein-2 assembly, whereas initiation and extension of the axoneme, localization of intraflagellar transport complex-B proteins, transition zone integrity, and Hedgehog signalling were also affected.

Original languageEnglish
Article numberjcs260073
JournalJournal of Cell Science
Volume136
Issue number5
Early online date21 Oct 2022
DOIs
Publication statusPublished - 7 Nov 2022

Bibliographical note

Publisher Copyright:
© 2022. Published by The Company of Biologists Ltd.

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