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- Title
Mutations in TRAF3IP1/IFT54 reveal a new role for IFT proteins in microtubule stabilization.
- Authors
Bizet, Albane A.; Becker-Heck, Anita; Ryan, Rebecca; Weber, Kristina; Filhol, Emilie; Krug, Pauline; Halbritter, Jan; Delous, Marion; Lasbennes, Marie-Christine; Linghu, Bolan; Oakeley, Edward J.; Zarhrate, Mohammed; Nitschké, Patrick; Garfa-Traore, Meriem; Serluca, Fabrizio; Yang, Fan; Bouwmeester, Tewis; Pinson, Lucile; Cassuto, Elisabeth; Dubot, Philippe
- Abstract
Ciliopathies are a large group of clinically and genetically heterogeneous disorders caused by defects in primary cilia. Here we identified mutations in TRAF3IP1 (TNF Receptor-Associated Factor Interacting Protein 1) in eight patients from five families with nephronophthisis (NPH) and retinal degeneration, two of the most common manifestations of ciliopathies. TRAF3IP1 encodes IFT54, a subunit of the IFT-B complex required for ciliogenesis. The identified mutations result in mild ciliary defects in patients but also reveal an unexpected role of IFT54 as a negative regulator of microtubule stability via MAP4 (microtubule-associated protein 4). Microtubule defects are associated with altered epithelialization/polarity in renal cells and with pronephric cysts and microphthalmia in zebrafish embryos. Our findings highlight the regulation of cytoplasmic microtubule dynamics as a role of the IFT54 protein beyond the cilium, contributing to the development of NPH-related ciliopathies.
- Subjects
CILIOPATHY; GENETIC disorders; CILIATA; RETINAL degeneration; MICROTUBULE-associated proteins
- Publication
Scientific Reports, 2015, p8666
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/ncomms9666