Mutations impairing GSK3-mediated MAF phosphorylation cause cataract, deafness, intellectual disability, seizures, and a down syndrome-like facies

Giuseppe Zampino, Alessandro Ciolfi, Chiara Leoni, Marcello Niceta, Emilia Stellacci, Karen W. Gripp, Maria Kousi, Massimiliano Anselmi, Alice Traversa, Andrea Ciolfi, Deborah Stabley, Alessandro Bruselles, Viviana Caputo, Serena Cecchetti, Sabrina Prudente, Maria T. Fiorenza, Carla Boitani, Nicole Philip, Dmitriy Niyazov, Takaya NakaneKim Keppler-Noreuil, Stephen R. Braddock, Gabriele Gillessen-Kaesbach, Antonio Palleschi, Philippe M. Campeau, Brendan H.L. Lee, Celio Pouponnot, Lorenzo Stella, Gianfranco Bocchinfuso, Nicholas Katsanis, Katia Sol-Church

Risultato della ricerca: Contributo in rivistaArticolo in rivista

63 Citazioni (Scopus)

Abstract

Transcription factors operate in developmental processes to mediate inductive events and cell competence, and perturbation of their function or regulation can dramatically affect morphogenesis, organogenesis, and growth. We report that a narrow spectrum of amino-acid substitutions within the transactivation domain of the v-maf avian musculoaponeurotic fibrosarcoma oncogene homolog (MAF), a leucine zipper-containing transcription factor of the AP1 superfamily, profoundly affect development. Seven different de novo missense mutations involving conserved residues of the four GSK3 phosphorylation motifs were identified in eight unrelated individuals. The distinctive clinical phenotype, for which we propose the eponym Aymé-Gripp syndrome, is not limited to lens and eye defects as previously reported for MAF/Maf loss of function but includes sensorineural deafness, intellectual disability, seizures, brachycephaly, distinctive flat facial appearance, skeletal anomalies, mammary gland hypoplasia, and reduced growth. Disease-causing mutations were demonstrated to impair proper MAF phosphorylation, ubiquitination and proteasomal degradation, perturbed gene expression in primary skin fibroblasts, and induced neurodevelopmental defects in an in vivo model. Our findings nosologically and clinically delineate a previously poorly understood recognizable multisystem disorder, provide evidence for MAF governing a wider range of developmental programs than previously appreciated, and describe a novel instance of protein dosage effect severely perturbing development.
Lingua originaleEnglish
pagine (da-a)816-825
Numero di pagine10
RivistaAmerican Journal of Human Genetics
Volume96
DOI
Stato di pubblicazionePubblicato - 2015

Keywords

  • Cataract
  • Deafness
  • Down Syndrome
  • Glycogen Synthase Kinase 3
  • Humans
  • Intellectual Disability
  • Mutation
  • Phenotype
  • Phosphorylation
  • Proto-Oncogene Proteins c-maf
  • Seizures

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