| Autor: |
Franziska Langhammer, Reza Maroofian, Rueda Badar, Anne Gregor, Michelle Rochman, Jeffrey B. Ratliff, Marije Koopmans, Theresia Herget, Maja Hempel, Fanny Kortüm, Delphine Heron, Cyril Mignot, Boris Keren, Susan Brooks, Christina Botti, Bruria Ben-Zeev, Emanuela Argilli, Elliot H. Sherr, Vykuntaraju K. Gowda, Varunvenkat M. Srinivasan, Somayeh Bakhtiari, Michael C. Kruer, Mustafa A. Salih, Alma Kuechler, Eric A. Muller, Karli Blocker, Outi Kuismin, Kristen L. Park, Aaina Kochhar, Kathleen Brown, Subhadra Ramanathan, Robin Dawn Clark, Magdeldin Elgizouli, Gia Melikishvili, Nazhi Tabatadze, Zornitza Stark, Ghayda M. Mirzaa, Jinfon Ong, Ute Grasshoff, Andrea Bevot, Lydia von Wintzingerode, Rami Abou Jamra, Yvonne Hennig, Paula Goldenberg, Chadi Al Alam, Majida Charif, Redouane Boulouiz, Mohammed Bellaoui, Rim Amrani, Fuad Al Mutairi, Abdullah M. Tamim, Firdous Abdulwahab, Fowzan S. Alkuraya, Ebtissal Mohammad Khouj, Javeria Raza Alvi, Tipu Sulta, Narges Hashemi, Ehsan Ghayoor Karimiani, Farah Ashrafzadeh, Shima Imannezhad, Stephanie Efthymiou, Henry Houlden, Heinrich Sticht, Christiane Zweier |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Genetics in Medicine. :100885 |
| ISSN: |
1098-3600 |
| Popis: |
PURPOSE Missense variants clustering in the BTB domain region of RHOBTB2 cause a developmental and epileptic encephalopathy (DEE) with early-onset seizures and severe intellectual disability. METHODS By international collaboration we assembled individuals with pathogenic RHOBTB2 variants and a variable spectrum of neurodevelopmental disorders (NDDs). By western blotting we investigated the consequences of missense variants in vitro. RESULTS In accordance with previous observations, de novo heterozygous missense variants in the BTB domain region led to a severe DEE in 16 individuals. We now identified also de novo missense variants in the GTPase domain in six individuals with apparently more variable neurodevelopmental phenotypes with or without epilepsy. In contrast to variants in the BTB domain region, variants in the GTPase domain do not impair proteasomal degradation of RHOBTB2 in vitro, indicating different functional consequences.Furthermore, we observed bi-allelic splice-site and truncating variants in nine families with variable neurodevelopmental phenotypes, indicating that complete loss of RHOBTB2 is pathogenic as well. CONCLUSION By identifying phenotype-genotype correlations regarding location and consequences of de novo missense variants in RHOBTB2 and by identifying bi-allelic truncating variants, we further delineate and expand the molecular and clinical spectrum of RHOBTB2 related disorders including both autosomal dominant and recessive NDDs. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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