Abstract
Defects in primary cilium biogenesis underlie the ciliopathies, a growing group of genetic disorders. We describe a whole-genome siRNA-based reverse genetics screen for defects in biogenesis and/or maintenance of the primary cilium, obtaining a global resource. We identify 112 candidate ciliogenesis and ciliopathy genes, including 44 components of the ubiquitin-proteasome system, 12 G-protein-coupled receptors, and 3 pre-mRNA processing factors (PRPF6, PRPF8 and PRPF31) mutated in autosomal dominant retinitis pigmentosa. The PRPFs localize to the connecting cilium, and PRPF8- and PRPF31-mutated cells have ciliary defects. Combining the screen with exome sequencing data identified recessive mutations in PIBF1, also known as CEP90, and C21orf2, also known as LRRC76, as causes of the ciliopathies Joubert and Jeune syndromes. Biochemical approaches place C21orf2 within key ciliopathy-associated protein modules, offering an explanation for the skeletal and retinal involvement observed in individuals with C21orf2 variants. Our global, unbiased approaches provide insights into ciliogenesis complexity and identify roles for unanticipated pathways in human genetic disease.
Original language | English |
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Pages (from-to) | 1074-87 |
Number of pages | 14 |
Journal | Nature Cell Biology |
Volume | 17 |
Issue number | 8 |
DOIs | |
Publication status | Published - Aug 2015 |
Keywords
- Abnormalities, Multiple
- Animals
- Caenorhabditis elegans
- Cerebellar Diseases
- Cerebellum
- Cilia
- Ciliary Motility Disorders
- Databases, Genetic
- Ellis-Van Creveld Syndrome
- Eye Abnormalities
- Genetic Markers
- Genetic Predisposition to Disease
- Genetic Testing
- Genome-Wide Association Study
- Genomics
- HEK293 Cells
- High-Throughput Nucleotide Sequencing
- Humans
- Kidney Diseases, Cystic
- Membrane Proteins
- Mice, Inbred C57BL
- Mice, Knockout
- Mutation
- Phenotype
- Photoreceptor Cells
- Pregnancy Proteins
- Proteins
- RNA Interference
- Reproducibility of Results
- Retina
- Suppressor Factors, Immunologic
- Transfection
- Zebrafish