A second cohort of CHD3 patients expands the molecular mechanisms known to cause Snijders Blok-Campeau syndrome

Theodore G. Drivas, Dong Li, Divya Nair, Joseph T. Alaimo, Mariëlle Alders, Janine Altmüller, Tahsin Stefan Barakat, E. Martina Bebin, Nicole L. Bertsch, Patrick R. Blackburn, Alyssa Blesson, Arjan M. Bouman, Knut Brockmann, Perrine Brunelle, Margit Burmeister, Gregory M. Cooper, Jonas Denecke, Anne Dieux-Coëslier, Holly Dubbs, Alejandro FerrerDanna Gal, Lauren E. Bartik, Lauren B. Gunderson, Linda Hasadsri, Mahim Jain, Catherine Karimov, Beth Keena, Eric W. Klee, Katja Kloth, Baiba Lace, Marina Macchiaiolo, Julien L. Marcadier, Jeff M. Milunsky, Melanie P. Napier, Xilma R. Ortiz-Gonzalez, Pavel N. Pichurin, Jason Pinner, Zoe Powis, Chitra Prasad, Francesca Clementina Radio, Kristen J. Rasmussen, Deborah L. Renaud, Eric T. Rush, Carol Saunders, Duygu Selcen, Ann R. Seman, Deepali N. Shinde, Erica D. Smith, Thomas Smol, Lot Snijders Blok, Joan M. Stoler, Sha Tang, Marco Tartaglia, Michelle L. Thompson, Jiddeke M. van de Kamp, Jingmin Wang, Dagmar Weise, Karin Weiss, Rixa Woitschach, Bernd Wollnik, Huifang Yan, Elaine H. Zackai, Giuseppe Zampino, Philippe Campeau, Elizabeth Bhoj

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21 Citations (Scopus)


There has been one previous report of a cohort of patients with variants in Chromodomain Helicase DNA-binding 3 (CHD3), now recognized as Snijders Blok-Campeau syndrome. However, with only three previously-reported patients with variants outside the ATPase/helicase domain, it was unclear if variants outside of this domain caused a clinically similar phenotype. We have analyzed 24 new patients with CHD3 variants, including nine outside the ATPase/helicase domain. All patients were detected with unbiased molecular genetic methods. There is not a significant difference in the clinical or facial features of patients with variants in or outside this domain. These additional patients further expand the clinical and molecular data associated with CHD3 variants. Importantly we conclude that there is not a significant difference in the phenotypic features of patients with various molecular disruptions, including whole gene deletions and duplications, and missense variants outside the ATPase/helicase domain. This data will aid both clinical geneticists and molecular geneticists in the diagnosis of this emerging syndrome.
Original languageEnglish
Pages (from-to)1422-1431
Number of pages10
JournalEuropean journal of human genetics
Issue number10
Early online date2020
Publication statusPublished - 1 Oct 2020


  • Adolescent
  • Adult
  • Catalytic Domain
  • Child
  • Child, Preschool
  • Craniofacial Abnormalities/genetics
  • DNA Helicases/chemistry
  • Developmental Disabilities/genetics
  • Female
  • Humans
  • Infant
  • Intellectual Disability/genetics
  • Male
  • Mi-2 Nucleosome Remodeling and Deacetylase Complex/chemistry
  • Mutation
  • Phenotype
  • Syndrome

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