Abstract
Joubert syndrome (JBTS), related disorders (JSRDs) and Meckel syndrome (MKS) are ciliopathies. We now report that MKS2 and CORS2 (JBTS2) loci are allelic and caused by mutations in TMEM216, which encodes an uncharacterized tetraspan transmembrane protein. Individuals with CORS2 frequently had nephronophthisis and polydactyly, and two affected individuals conformed to the oro-facio-digital type VI phenotype, whereas skeletal dysplasia was common in fetuses affected by MKS. A single G218T mutation (R73L in the protein) was identified in all cases of Ashkenazi Jewish descent (n = 10). TMEM216 localized to the base of primary cilia, and loss of TMEM216 in mutant fibroblasts or after knockdown caused defective ciliogenesis and centrosomal docking, with concomitant hyperactivation of RhoA and Dishevelled. TMEM216 formed a complex with Meckelin, which is encoded by a gene also mutated in JSRDs and MKS. Disruption of tmem216 expression in zebrafish caused gastrulation defects similar to those in other ciliary morphants. These data implicate a new family of proteins in the ciliopathies and further support allelism between ciliopathy disorders.
Original language | English |
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Pages (from-to) | 619-625 |
Number of pages | 7 |
Journal | Nature Genetics |
Volume | 42 |
Issue number | 7 |
DOIs | |
State | Published - Jul 2010 |
Externally published | Yes |
Funding
Funders | Funder number |
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Agence Nationale de la Recherche | |
Broad Institute | |
Sir Jules Thorn Charitable Trust | |
US National Institutes of Health National Heart, Lung, and Blood Institute | |
l’Agence National pour la Recherche | |
Burroughs Wellcome Fund | |
Marshfield Clinic Research Foundation | |
Fondazione Pierfranco e Luisa Mariani | |
BDF Newlife | |
Howard Hughes Medical Institute | |
UK Research and Innovation | |
National Institute of General Medical Sciences | R01GM121317 |
Ministero della Salute | RC2010 |
National Institute of Diabetes and Digestive and Kidney Diseases | R01DK072301, F32DK079541, R01DK075972, R01DK068306 |
National Institute of Neurological Disorders and Stroke | R01NS052455, R01NS048453, P30NS047101 |
National Institutes of Health | R01 HD04260, R01 NS04843 |
Medical Research Council | G0700073 |
INSERM-DGRSRT | 87 |
National Human Genome Research Institute | U54HG003067 |
Fondazione Telethon | GGP08145 |
American Heart Association | O9POST2250641 |
Eunice Kennedy Shriver National Institute of Child Health and Human Development | R01HD042601 |