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© Thierry Blisnick & Philippe Bastin, Institut Pasteur
Bloodstream Trypanosoma brucei cell
Publication : Journal of cell science

IFT25 is required for the construction of the trypanosome flagellum

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of cell science - 01 Feb 2019

Huet D, Blisnick T, Perrot S, Bastin P

Link to Pubmed [PMID] – 30709917

J. Cell. Sci. 2019 Feb;

Intraflagellar transport (IFT), the movement of protein complexes responsible for the assembly of cilia and flagella, is remarkably conserved from protists to humans. However, two IFT components (IFT25 and IFT27) are missing from multiple unrelated eukaryotic species. In mouse, IFT25 and IFT27 are not required for assembly of several cilia with the noticeable exception of the flagellum of spermatozoa. Here we show that the IFT25 protein is a proper component of the IFT-B complex and displays typical IFT trafficking. Using bimolecular fluorescence complementation assays, we reveal that IFT25 and IFT27 interact within the flagellum in live cells during the IFT process. IFT25-depleted cells construct tiny disorganised flagella that accumulate IFT-B proteins (with the exception of IFT27, the binding partner of IFT25) but not IFT-A proteins. This phenotype is comparable to the one following depletion of IFT27 and shows that IFT25/IFT27 constitute a specific module requested for proper IFT and flagellum construction in trypanosomes. Possible reasons why IFT25/IFT27 would be required for only some types of cilia are discussed.

https://www.ncbi.nlm.nih.gov/pubmed/30709917