De novo variants of CSNK2B cause a new intellectual disability-craniodigital syndrome by disrupting the canonical Wnt signaling pathway
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA781446 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR16972864_1.fastq.gz | Fastqsanger.gz | |||
| SRR16972864_2.fastq.gz | Fastqsanger.gz | |||
| SRR16972865_1.fastq.gz | Fastqsanger.gz | |||
| SRR16972865_2.fastq.gz | Fastqsanger.gz | |||
| SRR16972866_1.fastq.gz | Fastqsanger.gz |
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Project description:Identifying causes of sporadic intellectual disability remains a considerable medical challenge. Here, we demonstrate that null mutations in the NONO gene, a member of the Drosophila Behavior Human Splicing (DBHS) protein family, are a novel cause of X-linked syndromic intellectual disability. Comparing humans to Nono-deficient mice revealed related behavioral and craniofacial anomalies, as well as global transcriptional dysregulation. Nono-deficient mice also showed deregulation of a large number of synaptic transcripts, causing a disorganization of inhibitory synapses, with impaired postsynaptic scaffolding of gephyrin. Alteration of gephyrin clustering could be rescued by over-expression of Gabra2 in NONO-compromised neurons. These findings link NONO to intellectual disability and first highlight the key role of DBHS proteins in functional organization of GABAergic synapses.
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Project description:Main purpose of the project is to delineate the consequences of de novo variants identified in patients manifesting intellectual disability-craniodigital syndrome. To this end, we investigated the effects of mutated CK2β by performing phosphor proteome profiling of patient derived LCLs along with the age and gender matched control.
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Project description:Main purpose of the project is to delineate the consequences of de novo variants identified in patients manifesting intellectual disability-craniodigital syndrome. By employing pulldown assay coupled with mass spectrometry, we investigated the novel binding partners of CK2β and tried to find the impaired interaction due to variant, CK2β:NP_001311.3;p.Asp32His. Furthermore, we also investigated the effects of mutated CK2β by performing phosphoproteome profiling of patient derived LCLs along with the age and gender matched control.
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Project description:Main purpose of the project is to investigate the consequences of de novo CSNK2B variant on transcriptome profiling of the patient compared to control. In this data, we seen differential expression of genes involved in the Wnt signaling pathway and transcription regulator.
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Project description:Mutations of TCF4, which encodes a basic helix-loop-helix transcription factor, cause Pitt-Hopkins syndrome (PTHS) via multiple genetic mechanisms. TCF4 is a complex locus expressing multiple transcripts by alternative splicing and use of multiple promoters. We report a three-generation family segregating mild intellectual disability with an apparently balanced chromosomal translocation t(14;18)(q23.3;q21.2) that we characterized as a complex unbalanced karyotype 46,XY,der(14)del(14)(q23.3q23.3)t(14;18)(q23.3;q21.2)del(18)(q21.2q21.2) del(18)(q21.2q21.2)inv(18)(q21.2q21.2),der(18)t(14 ;18)(q23.3;q21.2) disrupting TCF4. Using whole genome sequencing, transcriptome sequencing, qRT-PCR and nCounter analysis, we characterized the breakpoint junctions from derivative chromosomes and gene expression at the TCF4 locus. Our analyses revealed that family members segregating mild intellectual disability with the complex chromosome aberration had normal expression of genes along chromosomes 14 or 18 and no marked changes in expression of genes other than TCF4. Affected individuals had 12-33 fold higher mRNA levels of TCF4 than did unaffected controls or individuals with PTHS. Increased levels of TCF4 transcript variants originating distal to the translocation breakpoint, not the fusion transcript generated by the derivative chromosome, contributed to this increased. Although validation in additional patients is required, our findings suggest that the dysmorphic features and severe intellectual disability characteristic of PTHS is partially rescued by overexpression of short TCF4 transcripts encoding a nuclear localization signal, a transcription activation domain, and the basic helix-loop-helix domain. Examination of TCF4 Isoform expression comparison between mutant and control skin fibroblast tissues
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