Bengani, H, Handley, M orcid.org/0000-0001-7200-747X, Alvi, M et al. (31 more authors) (2017) Clinical and molecular consequences of disease-associated de novo mutations in SATB2. Genetics in Medicine, 19 (8). pp. 900-908. ISSN 1098-3600
Abstract
Purpose:
To characterize features associated with de novo mutations affecting SATB2 function in individuals ascertained on the basis of intellectual disability.
Methods:
Twenty previously unreported individuals with 19 different SATB2mutations (11 loss-of-function and 8 missense variants) were studied. Fibroblasts were used to measure mutant protein production. Subcellular localization and mobility of wild-type and mutant SATB2 were assessed using fluorescently tagged protein.
Results:
Recurrent clinical features included neurodevelopmental impairment (19/19), absent/near absent speech (16/19), normal somatic growth (17/19), cleft palate (9/19), drooling (12/19), and dental anomalies (8/19). Six of eight missense variants clustered in the first CUT domain. Sibling recurrence due to gonadal mosaicism was seen in one family. A nonsense mutation in the last exon resulted in production of a truncated protein retaining all three DNA-binding domains. SATB2 nuclear mobility was mutation-dependent; p.Arg389Cys in CUT1 increased mobility and both p.Gly515Ser in CUT2 and p.Gln566Lys between CUT2 and HOX reduced mobility. The clinical features in individuals with missense variants were indistinguishable from those with loss of function.
Conclusion:
SATB2 haploinsufficiency is a common cause of syndromic intellectual disability. When mutant SATB2 protein is produced, the protein appears functionally inactive with a disrupted pattern of chromatin or matrix association.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) (2017). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
Keywords: | absent speech; CUT domain; de novo mutation; intellectual disability; SATB2 |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Inst of Biomed & Clin Sciences (LIBACS) (Leeds) > Genetics (LIBACS) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 22 Jan 2019 13:09 |
Last Modified: | 22 Jan 2019 13:09 |
Status: | Published |
Publisher: | Springer Nature |
Identification Number: | 10.1038/gim.2016.211 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:141388 |
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