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Mutations in CSPP1 lead to classical Joubert syndrome.

American journal of human genetics | 2014

Joubert syndrome and related disorders (JSRDs) are genetically heterogeneous and characterized by a distinctive mid-hindbrain malformation. Causative mutations lead to primary cilia dysfunction, which often results in variable involvement of other organs such as the liver, retina, and kidney. We identified predicted null mutations in CSPP1 in six individuals affected by classical JSRDs. CSPP1 encodes a protein localized to centrosomes and spindle poles, as well as to the primary cilium. Despite the known interaction between CSPP1 and nephronophthisis-associated proteins, none of the affected individuals in our cohort presented with kidney disease, and further, screening of a large cohort of individuals with nephronophthisis demonstrated no mutations. CSPP1 is broadly expressed in neural tissue, and its encoded protein localizes to the primary cilium in an in vitro model of human neurogenesis. Here, we show abrogated protein levels and ciliogenesis in affected fibroblasts. Our data thus suggest that CSPP1 is involved in neural-specific functions of primary cilia.

Pubmed ID: 24360807 RIS Download

Research resources used in this publication

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Associated grants

  • Agency: NIDDK NIH HHS, United States
    Id: DK068306
  • Agency: Howard Hughes Medical Institute, United States
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS048453
  • Agency: NIDDK NIH HHS, United States
    Id: R01 DK068306
  • Agency: NICHD NIH HHS, United States
    Id: P01HD070494
  • Agency: NHGRI NIH HHS, United States
    Id: U54 HG003067
  • Agency: NINDS NIH HHS, United States
    Id: P30NS047101
  • Agency: NINDS NIH HHS, United States
    Id: R01NS048453
  • Agency: NINDS NIH HHS, United States
    Id: P30 NS047101
  • Agency: NIDDK NIH HHS, United States
    Id: P30 DK079310
  • Agency: NIH HHS, United States
    Id: S10 OD018521
  • Agency: NHGRI NIH HHS, United States
    Id: U54HG003067
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS041537
  • Agency: NHGRI NIH HHS, United States
    Id: U54HG006504
  • Agency: NHGRI NIH HHS, United States
    Id: U54 HG006504
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS052455
  • Agency: NICHD NIH HHS, United States
    Id: P01 HD070494
  • Agency: NINDS NIH HHS, United States
    Id: R01NS041537
  • Agency: NINDS NIH HHS, United States
    Id: R01NS052455

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