A de novo synonymous variant in EFTUD2 disrupts normal splicing and causes mandibulofacial dysostosis with microcephaly: case report.

Abstract:

BACKGROUND:Mandibulofacial dysostosis with microcephaly (MFDM) is a rare autosomal dominant genetic disease characterized by intellectual and growth retardations, as well as major microcephaly, induced by missense and splice site variants or microdeletions in the EFTUD2 gene. CASE PRESENTATION:Here, we investigate the case of a young girl with symptoms of MFDM and a normal karyotype. Whole-exome sequencing of the family was performed to identify genetic alterations responsible for this phenotype. We identified a de novo synonymous variant in the EFTUD2 gene. We demonstrated that this synonymous variant disrupts the donor splice-site in intron 9 resulting in the skipping of exon 9 and a frameshift that leads to a premature stop codon. CONCLUSIONS:We present the first case of MFDM caused by a synonymous variant disrupting the donor splice site, leading to exon skipping.

journal_name

BMC Med Genet

journal_title

BMC medical genetics

authors

Jacob A,Pasquier J,Carapito R,Auradé F,Molitor A,Froguel P,Fakhro K,Halabi N,Viot G,Bahram S,Rafii A

doi

10.1186/s12881-020-01121-y

subject

Has Abstract

pub_date

2020-09-17 00:00:00

pages

182

issue

1

issn

1471-2350

pii

10.1186/s12881-020-01121-y

journal_volume

21

pub_type

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