Ciliopathy patient variants reveal organelle-specific functions for TUBB4B in axonemal microtubules

Genomics England Research Consortium, Daniel O. Dodd, Sabrina Mechaussier, Patricia L. Yeyati, Fraser McPhie, Jacob R. Anderson, Chen Jing Khoo, Amelia Shoemark, Deepesh K. Gupta, Thomas Attard, Maimoona A. Zariwala, Marie Legendre, Diana Bracht, Julia Wallmeier, Miao Gui, Mahmoud R. Fassad, David A. Parry, Peter A. Tennant, Alison Meynert, Gabrielle WhewayLucas Fares-Taie, Holly A. Black, Rana Mitri-Frangieh, Catherine Faucon, Josseline Kaplan, Mitali Patel, Lisa McKie, Roly Megaw, Christos Gatsogiannis, Mai A. Mohamed, Stuart Aitken, Philippe Gautier, Finn R. Reinholt, Robert A. Hirst, Chris O’Callaghan, Ketil Heimdal, Mathieu Bottier, Estelle Escudier, Suzanne Crowley, Maria Descartes, Ethylin W. Jabs, Priti Kenia, Jeanne Amiel, Giacomo Maria Bacci, Claudia Calogero, Viviana Palazzo, Lucia Tiberi, Ulrike Blümlein, Andrew Rogers, Jennifer A. Wambach, Daniel J. Wegner, Anne B. Fulton, Margaret Kenna, Margaret Rosenfeld, Ingrid A. Holm, Alan Quigley, Emma A. Hall, Laura C. Murphy, Diane M. Cassidy, Alex von Kriegsheim, Scottish Genomes Partnership, Undiagnosed Diseases Network, Jean François Papon, Laurent Pasquier, Marlène S. Murris, James D. Chalmers, Claire Hogg, Kenneth A. Macleod, Don S. Urquhart, Stefan Unger, Timothy J. Aitman, Serge Amselem, Margaret W. Leigh, Michael R. Knowles, Heymut Omran, Hannah M. Mitchison, Alan Brown, Joseph A. Marsh, Julie P.I. Welburn, Shih Chieh Ti, Amjad Horani, Jean Michel Rozet, Isabelle Perrault, Pleasantine Mill

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Tubulin, one of the most abundant cytoskeletal building blocks, has numerous isotypes in metazoans encoded by different conserved genes. Whether these distinct isotypes form cell type– and context-specific microtubule structures is poorly understood. Based on a cohort of 12 patients with primary ciliary dyskinesia as well as mouse mutants, we identified and characterized variants in the TUBB4B isotype that specifically perturbed centriole and cilium biogenesis. Distinct TUBB4B variants differentially affected microtubule dynamics and cilia formation in a dominant-negative manner. Structure-function studies revealed that different TUBB4B variants disrupted distinct tubulin interfaces, thereby enabling stratification of patients into three classes of ciliopathic diseases. These findings show that specific tubulin isotypes have distinct and nonredundant subcellular functions and establish a link between tubulinopathies and ciliopathies.

Original languageEnglish
Article numbereadf5489
JournalScience
Volume384
Issue number6694
DOIs
StatePublished - Apr 26 2024

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