HEATR2 plays a conserved role in assembly of the ciliary motile apparatus

Diggle, Christine P; Moore, Daniel J; Mali, Girish; zur Lage, Petra; Ait-Lounis, Aouatef; Schmidts, Miriam; Shoemark, Amelia; Garcia Munoz, Amaya; Halachev, Mihail R; Gautier, Philippe; Yeyati, Patricia L; Bonthron, David T; Carr, Ian M; Hayward, Bruce; Markham, Alexander F; Hope, Jilly E; von Kriegsheim, Alex; Mitchison, Hannah M; Jackson, Ian J; Durand, Bénédicte; Reith, Walter; Sheridan, Eamonn; Jarman, Andrew P; Mill, Pleasantine

doi:10.1371/journal.pgen.1004577

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Title		HEATR2 plays a conserved role in assembly of the ciliary motile apparatus
Authors		Diggle, Christine P Moore, Daniel J Mali, Girish zur Lage, Petra Ait-Lounis, Aouatef Schmidts, Miriam Shoemark, Amelia Garcia Munoz, Amaya Halachev, Mihail R Gautier, Philippe Yeyati, Patricia L Bonthron, David T Carr, Ian M Hayward, Bruce Markham, Alexander F Hope, Jilly E von Kriegsheim, Alex Mitchison, Hannah M Jackson, Ian J Durand, Bénédicte Reith, Walter Sheridan, Eamonn Jarman, Andrew P Mill, Pleasantine show all authors [1 - 24]
Published in		PLOS Genetics. 2014, vol. 10, no. 9, e1004577
Abstract		Cilia are highly conserved microtubule-based structures that perform a variety of sensory and motility functions during development and adult homeostasis. In humans, defects specifically affecting motile cilia lead to chronic airway infections, infertility and laterality defects in the genetically heterogeneous disorder Primary Ciliary Dyskinesia (PCD). Using the comparatively simple Drosophila system, in which mechanosensory neurons possess modified motile cilia, we employed a recently elucidated cilia transcriptional RFX-FOX code to identify novel PCD candidate genes. Here, we report characterization of CG31320/HEATR2, which plays a conserved critical role in forming the axonemal dynein arms required for ciliary motility in both flies and humans. Inner and outer arm dyneins are absent from axonemes of CG31320 mutant flies and from PCD individuals with a novel splice-acceptor HEATR2 mutation. Functional conservation of closely arranged RFX-FOX binding sites upstream of HEATR2 orthologues may drive higher cytoplasmic expression of HEATR2 during early motile ciliogenesis. Immunoprecipitation reveals HEATR2 interacts with DNAI2, but not HSP70 or HSP90, distinguishing it from the client/chaperone functions described for other cytoplasmic proteins required for dynein arm assembly such as DNAAF1-4. These data implicate CG31320/HEATR2 in a growing intracellular pre-assembly and transport network that is necessary to deliver functional dynein machinery to the ciliary compartment for integration into the motile axoneme.
Identifiers		DOI: 10.1371/journal.pgen.1004577 PMID: 25232951
Full text		Article (Published version) (2.2 MB) - Free access
Structures		Faculté de médecine / Section de médecine fondamentale / Département de pathologie et immunologie
Research group		Groupe Reith Walter (pathologie et immunologie) (282)
Citation (ISO format)		DIGGLE, Christine P et al. HEATR2 plays a conserved role in assembly of the ciliary motile apparatus. In: PLOS Genetics, 2014, vol. 10, n° 9, p. e1004577. doi: 10.1371/journal.pgen.1004577 https://archive-ouverte.unige.ch/unige:44166