Suleiman-El-Hattab syndrome: a histone modification disorder caused by TASP1 deficiency
| Autor: | Korbinian M Riedhammer, Anna L Burgemeister, Vincent Cantagrel, Jeanne Amiel, Karine Siquier-Pernet, Nathalie Boddaert, Jozef Hertecant, Patricia L Kannouche, Caroline Pouvelle, Stephanie Htun, Anne M Slavotinek, Christian Beetz, Dan Diego-Alvarez, Kapil Kampe, Nicole Fleischer, Zain Awamleh, Rosanna Weksberg, Robert Kopajtich, Thomas Meitinger, Jehan Suleiman, Ayman W El-Hattab |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Hum Mol Genet Hum. Mol. Genet. 31, 3083-3094 (2022) |
| ISSN: | 1460-2083 |
| Popis: | Background: TASP1 encodes an endopeptidase activating histone methyltransferases of the KMT2 family. Homozygous loss-of-function variants in TASP1 have recently been associated with Suleiman-El-Hattab syndrome. We report six individuals with Suleiman-El-Hattab syndrome and provide functional characterization of this novel histone modification disorder in a multi-omics approach. Methods: Chromosomal microarray/exome sequencing in all individuals. Western blotting from fibroblasts in two individuals. RNA sequencing and proteomics from fibroblasts in one individual. Methylome analysis from blood in two individuals. Knock-out of tasp1 orthologue in zebrafish and phenotyping. Results: All individuals had biallelic TASP1 loss-of-function variants and a phenotype including developmental delay, multiple congenital anomalies (including cardiovascular and posterior fossa malformations), a distinct facial appearance and happy demeanor. Western blot revealed absence of TASP1. RNA sequencing/proteomics showed HOX gene downregulation (HOXA4, HOXA7, HOXA1 and HOXB2) and dysregulation of transcription factor TFIIA. A distinct methylation profile intermediate between control and Kabuki syndrome (KMT2D) profiles could be produced. Zebrafish tasp1 knock-out revealed smaller head size and abnormal cranial cartilage formation in tasp1 crispants. Conclusion: This work further delineates Suleiman-El-Hattab syndrome, a recognizable neurodevelopmental syndrome. Possible downstream mechanisms of TASP1 deficiency include perturbed HOX gene expression and dysregulated TFIIA complex. Methylation pattern suggests that Suleiman-El-Hattab syndrome can be categorized into the group of histone modification disorders including Wiedemann–Steiner and Kabuki syndrome. |
| Databáze: | OpenAIRE |
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