De Novo and Bi-allelic Pathogenic Variants in NARS1 Cause Neurodevelopmental Delay Due to Toxic Gain-of-Function and Partial Loss-of-Function Effects.
Détails
ID Serval
serval:BIB_C9F64A97AE52
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
De Novo and Bi-allelic Pathogenic Variants in NARS1 Cause Neurodevelopmental Delay Due to Toxic Gain-of-Function and Partial Loss-of-Function Effects.
Périodique
American journal of human genetics
Collaborateur⸱rice⸱s
SYNAPS Study Group
ISSN
1537-6605 (Electronic)
ISSN-L
0002-9297
Statut éditorial
Publié
Date de publication
06/08/2020
Peer-reviewed
Oui
Volume
107
Numéro
2
Pages
311-324
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Publication Status: ppublish
Résumé
Aminoacyl-tRNA synthetases (ARSs) are ubiquitous, ancient enzymes that charge amino acids to cognate tRNA molecules, the essential first step of protein translation. Here, we describe 32 individuals from 21 families, presenting with microcephaly, neurodevelopmental delay, seizures, peripheral neuropathy, and ataxia, with de novo heterozygous and bi-allelic mutations in asparaginyl-tRNA synthetase (NARS1). We demonstrate a reduction in NARS1 mRNA expression as well as in NARS1 enzyme levels and activity in both individual fibroblasts and induced neural progenitor cells (iNPCs). Molecular modeling of the recessive c.1633C>T (p.Arg545Cys) variant shows weaker spatial positioning and tRNA selectivity. We conclude that de novo and bi-allelic mutations in NARS1 are a significant cause of neurodevelopmental disease, where the mechanism for de novo variants could be toxic gain-of-function and for recessive variants, partial loss-of-function.
Mots-clé
aminoacyl-tRNA synthetase, developmental delay, epilepsy, neurodevelopment, neuropathy, next generation sequencing
Pubmed
Création de la notice
13/08/2020 7:45
Dernière modification de la notice
22/02/2023 0:18