Truncating de novo mutations in the Kruppel-type zinc-finger gene ZNF148 in patients with corpus callosum defects, developmental delay, short stature, and dysmorphisms

Servi J. C. Stevens*, Anthonie J. van Essen, Conny M. A. van Ravenswaaij, Abdallah F. Elias, Jaclyn A. Haven, Stefan H. Lelieveld, Rolph Pfundt, Willy M. Nillesen, Helger G. Yntema, Kees van Roozendaal, Alexander P. Stegmann, Christian Gilissen, Han G. Brunner

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Web of Science)

Abstract

Background: Kruppep-type zinc finger genes (ZNF) constitute a large yet relatively poorly characterized gene family. ZNF genes encode proteins that recognize specific DNA motifs in gene promotors. They act as transcriptional co-activators or -repressors via interaction with chromatin remodeling proteins and other transcription factors. Only few ZNF genes are currently linked to human disorders and identification of ZNF gene-associated human diseases may help understand their function. Here we provide genetic, statistical, and clinical evidence to support association of ZNF148 with a new intellectual disability (ID) syndrome disorder. Methods: Routine diagnostic exome sequencing data were obtained from 2172 patients with ID and/or multiple congenital anomalies. Results: In a cohort of 2172 patient-parent trios referred for routine diagnostic whole exome sequencing for ID and/or multiple congenital anomalies (MCA) in the period 2012-2016, four patients were identified who carried de novo heterozygous nonsense or frameshift mutations in the ZNF148 gene. This was the only ZNF gene with recurrent truncating de novo mutations in this cohort. All mutations resulted in premature termination codons in the last exon of ZNF148. The number of the de novo truncating mutations in the ZNF148 gene was significantly enriched (p = 5. 42 x 10(-3)). The newly described ZNF148-associated syndrome is characterized by underdevelopment of the corpus callosum, mild to moderate developmental delay and ID, variable microcephaly or mild macrocephaly, short stature, feeding problems, facial dysmorphisms, and cardiac and renal malformations. Conclusions: We propose ZNF148 as a gene involved in a newly described ID syndrome with a recurrent phenotype and postulate that the ZNF148 is a hitherto unrecognized but crucial transcription factor in the development of the corpus callosum. Our study illustrates the advantage of whole exome sequencing in a large cohort using a parent-offspring trio approach for identifying novel genes involved in rare human diseases.
Original languageEnglish
Article number131
JournalGenome Medicine
Volume8
DOIs
Publication statusPublished - 13 Dec 2016

Keywords

  • ZNF148
  • ZBP-89
  • Whole exome sequencing
  • Intellectual disability
  • Corpus callosum development
  • De novo mutations
  • Premature termination codon

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