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Identification of 30 transition fibre proteins in Trypanosoma brucei reveals a complex and dynamic structure

M. Ahmed, R. Wheeler, J. Týč, S. Shafiq, J. Sunter, S. Vaughan

. 2024 ; 137 (10) : . [pub] 20240603

Jazyk angličtina Země Anglie, Velká Británie

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc24013923

Grantová podpora
Wellcome Trust - United Kingdom
Nigel Groome PhD studentship
211075/Z/18/Z Wellcome Trust - United Kingdom
Oxford Brookes University

Transition fibres and distal appendages surround the distal end of mature basal bodies and are essential for ciliogenesis, but only a few of the proteins involved have been identified and functionally characterised. Here, through genome-wide analysis, we have identified 30 transition fibre proteins (TFPs) and mapped their arrangement in the flagellated eukaryote Trypanosoma brucei. We discovered that TFPs are recruited to the mature basal body before and after basal body duplication, with differential expression of five TFPs observed at the assembling new flagellum compared to the existing fixed-length old flagellum. RNAi-mediated depletion of 17 TFPs revealed six TFPs that are necessary for ciliogenesis and a further three TFPs that are necessary for normal flagellum length. We identified nine TFPs that had a detectable orthologue in at least one basal body-forming eukaryotic organism outside of the kinetoplastid parasites. Our work has tripled the number of known transition fibre components, demonstrating that transition fibres are complex and dynamic in their composition throughout the cell cycle, which relates to their essential roles in ciliogenesis and flagellum length regulation.

Citace poskytuje Crossref.org

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