Cited by 29Genomics and Rare DiseasesGenetics and Neurodevelopmental DisordersGenomic variations and chromosomal abnormalities

Missense variants in ANKRD11 cause KBG syndrome by impairment of stability or transcriptional activity of the encoded protein

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de Boer, Elke, Ockeloen, Charlotte W., Kampen, Rosalie A., Hampstead, Juliet E., Dingemans, Alexander J.M., Rots, Dmitrijs, Lütje, Lukas, Ashraf, Tazeen +42 more·2022·Genetics in Medicine

Published version of a preprint

Abstract

PURPOSE: Although haploinsufficiency of ANKRD11 is among the most common genetic causes of neurodevelopmental disorders, the role of rare ANKRD11 missense variation remains unclear. We characterized clinical, molecular, and functional spectra of ANKRD11 missense variants. METHODS: We collected clinical information of individuals with ANKRD11 missense variants and evaluated phenotypic fit to KBG syndrome. We assessed pathogenicity of variants through in silico analyses and cell-based experiments. RESULTS: We identified 20 unique, mostly de novo, ANKRD11 missense variants in 29 individuals, presenting with syndromic neurodevelopmental disorders similar to KBG syndrome caused by ANKRD11 protein truncating variants or 16q24.3 microdeletions. Missense variants significantly clustered in repression domain 2 at the ANKRD11 C-terminus. Of the 10 functionally studied missense variants, 6 reduced ANKRD11 stability. One variant caused decreased proteasome degradation and loss of ANKRD11 transcriptional activity. CONCLUSION: Our study indicates that pathogenic heterozygous ANKRD11 missense variants cause the clinically recognizable KBG syndrome. Disrupted transrepression capacity and reduced protein stability each independently lead to ANKRD11 loss-of-function, consistent with haploinsufficiency. This highlights the diagnostic relevance of ANKRD11 missense variants, but also poses diagnostic challenges because the KBG-associated phenotype may be mild and inherited pathogenic ANKRD11 (missense) variants are increasingly observed, warranting stringent variant classification and careful phenotyping.

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Authors
de Boer, E., Ockeloen, C. W., Kampen, R. A., Hampstead, J. E., Dingemans, A. J. M., Rots, D., Lütje, L., Ashraf, T., Baker, R., Barat-Houari, M., Angle, B., Chatron, N., Denommé-Pichon, A.-S., Devinsky, O., Dubourg, C., Elmslie, F., Elloumi, H. Z., Faivre, L., Fitzgerald-Butt, S., Geneviève, D., Goos, J. A. C., Helm, B. M., Kini, U., Lasa-Aranzasti, A., Lesca, G., Lynch, S. A., Mathijssen, I. M. J., McGowan, R., Monaghan, K. G., Odent, S., Pfundt, R., Putoux, A., van Reeuwijk, J., Santen, G. W. E., Sasaki, E., Sorlin, A., van der Spek, P. J., Stegmann, A. P. A., Swagemakers, S. M. A., Valenzuela, I., Viora-Dupont, E., Vitobello, A., Ware, S. M., Wéber, M., Gilissen, C., Low, K. J., Fisher, S. E., Vissers, L. E. L. M., Wong, M. M. K., & Kleefstra, T.
Affiliations
  • Radboud University Nijmegen (NL)
  • Max Planck Institute for Psycholinguistics (NL)
  • Guy's Hospital (GB)
  • Advocate Children's Hospital (US)
  • Lyon 1 Université (FR)
  • Centre National de la Recherche Scientifique (FR)
  • University of London (GB)
  • St George's, University of London (GB)
  • Inserm (FR)
  • Erasmus MC (NL)
  • University of Oxford (GB)
  • Children's Health Ireland at Crumlin (IE)
  • Centre Hospitalier Universitaire de Rennes (FR)
  • Maastricht University Medical Centre (NL)
  • Vall d'Hebron Institut de Recerca (ES)
  • University Hospitals Bristol and Weston NHS Foundation Trust (GB)
Corresponding author
Ockeloen, Charlotte W.
Venue
Genetics in Medicine
Publisher
Elsevier BV
Published
2022-10
Volume
24
Issue
10
Pages
2051-2064
ISSN
1098-3600 (ISSN-L)
OpenAlex
W4285401205
Cited by
28
References
41
Citations by year
2026: 5 · 2025: 4 · 2024: 8 · 2023: 8 · 2022: 3
FWCI
3.62
Type
journal article
Language
en
Update notices
erratum (2023-11-01)
Open access
Locations
  • Genetics in Medicine (publishedVersion, cc-by)
  • medRxiv (acceptedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • Research Publications (Maastricht University) (publishedVersion, cc-by)
  • EUR Research Repository (Erasmus University Rotterdam) (publishedVersion, cc-by)
  • St George's Online Research Archive (St George's University of London) (acceptedVersion)
  • IUScholarWorks (Indiana University) (submittedVersion, cc-by)
  • HAL (submittedVersion, cc-by)
  • Leiden Repository (Leiden University) (submittedVersion, cc-by)
  • Radboud Repository (Radboud University) (submittedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion, cc-by)
  • Data Archiving and Networked Services (DANS) (submittedVersion, cc-by)
  • HAL (submittedVersion, other-oa)
  • Explore Bristol Research (submittedVersion, cc-by)
  • Purdue University Indianapolis (Indiana University) (submittedVersion, cc-by)
  • Radboud Repository (Radboud University) (submittedVersion, other-oa)
  • Research Publications (Maastricht University) (submittedVersion, other-oa)
Funders
  • Scottish Government
  • European Commission (HICF-1009-003, HORIZON2020, 779257)
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek (015014066, 015.014.036, 91718310)
  • Max-Planck-Gesellschaft
  • Chief Scientist Office, Scottish Government Health and Social Care Directorate (SGP/1)
  • Medical Research Council (MC_PC_15080)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
Keywords
ANKRD11, KBG syndrome, missense mutations, haploinsufficiency, neurodevelopmental disorders, protein stability, proteasomal degradation, transcriptional activity, loss of function, variant interpretation, de novo mutations
MeSH terms
Abnormalities, Multiple, Bone Diseases, Developmental, Chromosome Deletion, Humans, Intellectual Disability, Phenotype, Repressor Proteins, Tooth Abnormalities, Transcription Factors, Facies, Mutation, Missense, Proteasome Endopeptidase Complex

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