Mutations in PLK4, Encoding a Master Regulator of Centriole Biogenesis, Cause Microcephaly, Growth Failure and Retinopathy

Nat Genet. 2014 Dec;46(12):1283-1292. doi: 10.1038/ng.3122. Epub 2014 Oct 26.

Abstract

Centrioles are essential for ciliogenesis. However, mutations in centriole biogenesis genes have been reported in primary microcephaly and Seckel syndrome, disorders without the hallmark clinical features of ciliopathies. Here we identify mutations in the genes encoding PLK4 kinase, a master regulator of centriole duplication, and its substrate TUBGCP6 in individuals with microcephalic primordial dwarfism and additional congenital anomalies, including retinopathy, thereby extending the human phenotypic spectrum associated with centriole dysfunction. Furthermore, we establish that different levels of impaired PLK4 activity result in growth and cilia phenotypes, providing a mechanism by which microcephaly disorders can occur with or without ciliopathic features.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Animals
  • Centrioles / ultrastructure
  • Child
  • Child, Preschool
  • Family Health
  • Female
  • Fibroblasts / metabolism
  • Genotype
  • Growth Disorders / genetics*
  • HeLa Cells
  • Humans
  • In Situ Hybridization, Fluorescence
  • Infant
  • Male
  • Microcephaly / genetics*
  • Microsatellite Repeats
  • Microtubule-Associated Proteins / genetics
  • Mitosis
  • Mutation*
  • Pakistan
  • Pedigree
  • Phenotype
  • Protein-Serine-Threonine Kinases / genetics*
  • Retinal Degeneration / genetics*
  • Young Adult
  • Zebrafish

Substances

  • Microtubule-Associated Proteins
  • TUBGCP6 protein, human
  • PLK4 protein, human
  • Protein-Serine-Threonine Kinases