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| Item Type: | Article |
|---|---|
| Title: | Biallelic variants in PCDHGC4 cause a novel neurodevelopmental syndrome with progressive microcephaly, seizures, and joint anomalies |
| Creators Name: | Iqbal, M. and Maroofian, R. and Çavdarlı, B. and Riccardi, F. and Field, M. and Banka, S. and Bubshait, D.K. and Li, Y. and Hertecant, J. and Baig, S.M. and Dyment, D. and Efthymiou, S. and Abdullah, U. and Makhdoom, E.U.H. and Ali, Z. and Scherf de Almeida, T and Molinari, F. and Mignon-Ravix, C. and Chabrol, B. and Antony, J. and Ades, L. and Pagnamenta, A.T. and Jackson, A. and Douzgou, S. and Beetz, C. and Karageorgou, V. and Vona, B. and Rad, A. and Baig, J.M. and Sultan, T. and Alvi, J.R. and Maqbool, S. and Rahman, F. and Toosi, M.B. and Ashrafzadeh, F. and Imannezhad, S. and Karimiani, E.G. and Sarwar, Y. and Khan, S. and Jameel, M. and Noegel, A.A. and Budde, B. and Altmüller, J. and Motameny, S. and Höhne, W. and Houlden, H. and Nürnberg, P. and Wollnik, B. and Villard, L. and Alkuraya, F.S. and Osmond, M. and Hussain, M.S. and Yigit, G. |
| Abstract: | PURPOSE: We aimed to define a novel autosomal recessive neurodevelopmental disorder, characterize its clinical features, and identify the underlying genetic cause for this condition. METHODS: We performed a detailed clinical characterization of 19 individuals from nine unrelated, consanguineous families with a neurodevelopmental disorder. We used genome/exome sequencing approaches, linkage and cosegregation analyses to identify disease-causing variants, and we performed three-dimensional molecular in silico analysis to predict causality of variants where applicable. RESULTS: In all affected individuals who presented with a neurodevelopmental syndrome with progressive microcephaly, seizures, and intellectual disability we identified biallelic disease-causing variants in Protocadherin-gamma-C4 (PCDHGC4). Five variants were predicted to induce premature protein truncation leading to a loss of PCDHGC4 function. The three detected missense variants were located in extracellular cadherin (EC) domains EC5 and EC6 of PCDHGC4, and in silico analysis of the affected residues showed that two of these substitutions were predicted to influence the Ca(2+)-binding affinity, which is essential for multimerization of the protein, whereas the third missense variant directly influenced the cis-dimerization interface of PCDHGC4. CONCLUSION: We show that biallelic variants in PCDHGC4 are causing a novel autosomal recessive neurodevelopmental disorder and link PCDHGC4 as a member of the clustered PCDH family to a Mendelian disorder in humans. |
| Keywords: | Cadherins, Intellectual Disability, Microcephaly, Neurodevelopmental Disorders, Pedigree, Phenotype, Seizures |
| Source: | Genetics in Medicine |
| ISSN: | 1098-3600 |
| Publisher: | Nature Publishing Group |
| Volume: | 23 |
| Number: | 11 |
| Page Range: | 2138-2149 |
| Date: | November 2021 |
| Official Publication: | https://doi.org/10.1038/s41436-021-01260-4 |
| PubMed: | View item in PubMed |
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