0000000000322184
AUTHOR
Sylvia Van Beersum
KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
Background Joubert syndrome (JBTS) and related disorders are defined by cerebellar malformation (molar tooth sign), together with neurological symptoms of variable expressivity. The ciliary basis of Joubert syndrome related disorders frequently extends the phenotype to tissues such as the eye, kidney, skeleton and craniofacial structures. Results Using autozygome and exome analyses, we identified a null mutation in KIAA0556 in a multiplex consanguineous family with hallmark features of mild Joubert syndrome. Patient-derived fibroblasts displayed reduced ciliogenesis potential and abnormally elongated cilia. Investigation of disease pathophysiology revealed that Kiaa0556-/- null mice possess…
Additional file 1: of KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
The phylogenetic distribution and sequence conservation of KIAA0556 orthologs in eukaryotes. Presence and sequence conservation of KIAA0556 are projected on the eukaryotic species tree to visualise the phylogenetic distribution of KIAA0556 orthologues as well as the distribution of the triple-repeat and quadruple-repeat configurations of the DUF4457 domains of unknown function. The black circles and white circles indicate which eukaryotic species contain or lack cilia/flagella. Recent KIAA0556 duplicates in Branchiostoma floridae and Paramecium tetraurelia are denoted by x2. *Dictyostelium discoideum protein sequence contains many â Nâ s (uncalled bases) in the N-terminal part of the sequen…
Additional file 1: of KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
The phylogenetic distribution and sequence conservation of KIAA0556 orthologs in eukaryotes. Presence and sequence conservation of KIAA0556 are projected on the eukaryotic species tree to visualise the phylogenetic distribution of KIAA0556 orthologues as well as the distribution of the triple-repeat and quadruple-repeat configurations of the DUF4457 domains of unknown function. The black circles and white circles indicate which eukaryotic species contain or lack cilia/flagella. Recent KIAA0556 duplicates in Branchiostoma floridae and Paramecium tetraurelia are denoted by x2. *Dictyostelium discoideum protein sequence contains many â Nâ s (uncalled bases) in the N-terminal part of the sequen…
Additional file 6: of KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
Results of the SF-TAP analysis with over-expressed N-terminally SF-TAP-tagged KIAA0556 in HEK293T cells. Shown is the number of unique identified peptides as well as the sequence coverage for each protein detected by mass spectrometry. Proteins identified in >1 out 17 SF-TAP control experiments (empty vector) were removed. (XLSX 28 kb)
Additional file 4: of KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
IFT analysis in C. elegans K04F10.2( tm1830 ) mutants. a Intraflagellar transport rates in wild-type and K04F10.2(tm1830) mutant worms. Shown are the anterograde and retrograde velocities (μm.s-1/standard deviation (SD)) of GFP-tagged IFT proteins along amphid and phasmid channel cilia (combined; top rows), or phasmid cilia only (bottom rows). t-test pairwise comparison with wild-type controls, n number of particles, N measured number of amphids and phasmids. OSM-3 is the worm orthologue of KIF17; CHE-11 is the worm orthologue of IFT140; OSM-6 is the worm orthologue of IFT52. b Representative fluorescence images of phasmid cilia showing normal IFT protein localisations and distributions in …
Additional file 8: of KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
Post-embryonic tissue expression of C. elegans katanin genes mei-1 , mei-2 and F47G4.4. Shown are fluorescence images of worms expressing a transcriptional GFP reporter under the control of the indicated geneâ s promoter, which stains the entire cell in which it is expressed. DiI (red) co-stain identifies six pairs of ciliated amphid neurons and both pairs of ciliated phasmid neurons. Arrowheads denote cells with both red and green signals. Other ciliated head cells are identifiable by long dendritic processes (arrows) extending to the anterior end of the worm. Scale bars, 20Â Îźm (all images similarly scaled). (JPG 611 kb)
Additional file 2: of KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
Alignment of IFT25 with permutated KIAA0556 repeat sequences. When aligned using HHpred, a significant part of the Chlamydomonas IFT25 N-terminus was unmatched with human KIAA0556 and significant sequence remained at the C-terminus of the repeats, suggesting a circular permutation relationship between the repeats and IFT25. Shown is a HHpred alignment of IFT25 orthologues with permutated repeat sequences (r1–4) from KIAA0556 orthologues, which results in improved sequence matches. In each permutated repeat sequence, 30–40 amino acids from the beginning of each repeat have been added to the end of the same repeat (denoted by red box) using manual editing. The precise number of amino acids tr…
Additional file 3: of KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
Ciliary phenotypes that are unaffected in C. elegans K04F10.2( tm1830 ) mutants. a K04F10.2 mutants possess normal fluorescent dye (DiI) filling in amphid (head) and phasmid (tail) neurons. Scale bars, 15 μm. b The lengths and morphologies of various sensory neuronal cilia are normal in K04F10.2 mutants. Shown are fluorescence images of cilia from worms expressing str-1p::GFP (AWB neuron), gcy-5p::GFP (ASER neuron) and OSM-6::GFP (PHA/B neurons) transgenes. Numbers (± standard error of the mean) refer to cilium lengths. Scale bars, 2 μm. c–e K04F10.2 mutants possess normal sensory benzaldehyde chemoattraction (n = 10), osmotic avoidance (n = 10), and foraging/roaming (n = 34) behaviours. ch…
Additional file 7: of KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
Supplementary information to the data in Fig. 8 . a Schematic representation of all the different KIAA0556 fragments used to screen our selection of 200+ ciliary proteins. The predicted protein repeat domains, shown in Additional files 1 and 2, are depicted as d1 to d4. Constructs were generated containing isolated domains as well as a combination of domains. b Single transfections of PalMyr-KIAA0556 and mRFP-KATNBL1, showing that membrane localisation of the mRFP tagged protein is indeed dependent on the interaction with the PalMyr-tagged protein. (JPG 491 kb)
Additional file 5: of KIAA0556 is a novel ciliary basal body component mutated in Joubert syndrome
Data supplementary to the nocodazole destabilization assay shown in Fig. 7 . a, b Replicate images of DMSO or nocodazole-treated hTERT-RPE1 cells. Cells were transfected with SF-TAP-tagged KIAA0556 (detected with anti-FLAG immunostaining; green) or GFP-KIAA0556 and counterstained with anti-acetylated tubulin (red) and DAPI (blue). Cells with high KIAA0556 expression are characterised by a filamentous staining pattern and spots of accumulated KIAA0556 signal. In non-transfected cells, 10 minute nocodazole treatment resulted in the loss of a stabilised MT network (see especially the high exposure images), as judged by loss of (almost) all cytoplasmic acetylated tubulin staining and/or the abs…