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Further evidence for de novo variants in SYNCRIP as the cause of a neurodevelopmental disorder
Author(s) -
Semino Francesca,
Schröter Julian,
Willemsen Marjolein H.,
Bast Thomas,
Biskup Saskia,
BeckWoedl Stefanie,
Brennenstuhl Heiko,
Schaaf Christian P.,
Kölker Stefan,
Hoffmann Georg F.,
Haack Tobias B.,
Syrbe Steffen
Publication year - 2021
Publication title -
human mutation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.981
H-Index - 162
eISSN - 1098-1004
pISSN - 1059-7794
DOI - 10.1002/humu.24245
Subject(s) - biology , frameshift mutation , haploinsufficiency , missense mutation , genetics , epilepsy , phenotype , intellectual disability , neurodevelopmental disorder , autism spectrum disorder , rna binding protein , autism , neuroscience , gene , rna , psychology , psychiatry
SYNCRIP encodes for the Synaptotagmin‐binding cytoplasmic RNA‐interacting protein, involved in RNA‐binding and regulation of multiple cellular pathways. It has been proposed as a candidate gene for neurodevelopmental disorders (NDDs) with autism spectrum disorder (ASD), intellectual disability (ID), and epilepsy. We ascertained genetic, clinical, and neuroradiological data of three additional individuals with novel de novo SYNCRIP variants. All individuals had ID. Autistic features were observed in two. One individual showed myoclonic‐atonic epilepsy. Neuroradiological features comprised periventricular nodular heterotopia and widening of subarachnoid spaces. Two frameshift variants in the more severely affected individuals, likely result in haploinsufficiency. The third missense variant lies in the conserved RNA recognition motif (RRM) 2 domain likely affecting RNA‐binding. Our findings support the importance of RRM domains for SYNCRIP functionality and suggest genotype‐phenotype correlations. Our study provides further evidence for a SYNCRIP ‐associated NDD characterized by ID and ASD sporadically accompanied by malformations of cortical development and myoclonic‐atonic epilepsy.

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