Mutations in KIAA0753 cause Joubert syndrome associated with growth hormone deficiency

NISC Comparative Sequencing Program

Research output: Contribution to journalArticle

Abstract

Joubert syndrome and related disorders (JSRD) are a heterogeneous group of ciliopathies defined based on the mid-hindbrain abnormalities that result in the characteristic “molar tooth sign” on brain imaging. The core clinical findings of JSRD are hypotonia, developmental delay, abnormal eye movements and breathing abnormalities. To date, more than 30 JSRD genes that encode proteins important for structure and/or function of cilia have been identified. Here, we present 2 siblings with Joubert syndrome associated with growth hormone deficiency. Whole exome sequencing of the family identified compound heterozygous mutations in KIAA0753, i.e., a missense mutation (p.Arg257Gly) and an intronic mutation (c.2359-1G>C). The intronic mutation alters normal splicing by activating a cryptic acceptor splice site in exon 16. The novel acceptor site skips nine nucleotides, deleting three amino acids from the protein coding frame. KIAA0753 (OFIP) is a centrosome and pericentriolar satellite protein, previously not known to cause Joubert syndrome. We present comprehensive clinical descriptions of the Joubert syndrome patients as well as the cellular phenotype of defective ciliogenesis in the patients’ fibroblasts.

Original languageEnglish (US)
Pages (from-to)399-408
Number of pages10
JournalHuman Genetics
Volume136
Issue number4
DOIs
StatePublished - Apr 1 2017

Fingerprint

Growth Hormone
Mutation
Exome
Centrosome
Developmental Disabilities
Rhombencephalon
RNA Splice Sites
Proteins
Muscle Hypotonia
Cilia
Dyskinesias
Missense Mutation
Eye Movements
Neuroimaging
Joubert syndrome 1
Siblings
Exons
Tooth
Respiration
Nucleotides

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

Cite this

Mutations in KIAA0753 cause Joubert syndrome associated with growth hormone deficiency. / NISC Comparative Sequencing Program.

In: Human Genetics, Vol. 136, No. 4, 01.04.2017, p. 399-408.

Research output: Contribution to journalArticle

NISC Comparative Sequencing Program. / Mutations in KIAA0753 cause Joubert syndrome associated with growth hormone deficiency. In: Human Genetics. 2017 ; Vol. 136, No. 4. pp. 399-408.
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