A novel ribosomopathy caused by dysfunction of RPL10 disrupts neurodevelopment and causes X-linked microcephaly in humans.
Published
Journal Article
Neurodevelopmental defects in humans represent a clinically heterogeneous group of disorders. Here, we report the genetic and functional dissection of a multigenerational pedigree with an X-linked syndromic disorder hallmarked by microcephaly, growth retardation, and seizures. Using an X-linked intellectual disability (XLID) next-generation sequencing diagnostic panel, we identified a novel missense mutation in the gene encoding 60S ribosomal protein L10 (RPL10), a locus associated previously with autism spectrum disorders (ASD); the p.K78E change segregated with disease under an X-linked recessive paradigm while, consistent with causality, carrier females exhibited skewed X inactivation. To examine the functional consequences of the p.K78E change, we modeled RPL10 dysfunction in zebrafish. We show that endogenous rpl10 expression is augmented in anterior structures, and that suppression decreases head size in developing morphant embryos, concomitant with reduced bulk translation and increased apoptosis in the brain. Subsequently, using in vivo complementation, we demonstrate that p.K78E is a loss-of-function variant. Together, our findings suggest that a mutation within the conserved N-terminal end of RPL10, a protein in close proximity to the peptidyl transferase active site of the 60S ribosomal subunit, causes severe defects in brain formation and function.
Full Text
Duke Authors
Cited Authors
- Brooks, SS; Wall, AL; Golzio, C; Reid, DW; Kondyles, A; Willer, JR; Botti, C; Nicchitta, CV; Katsanis, N; Davis, EE
Published Date
- October 2014
Published In
Volume / Issue
- 198 / 2
Start / End Page
- 723 - 733
PubMed ID
- 25316788
Pubmed Central ID
- 25316788
Electronic International Standard Serial Number (EISSN)
- 1943-2631
Digital Object Identifier (DOI)
- 10.1534/genetics.114.168211
Language
- eng
Conference Location
- United States