Recessive VARS2 mutation underlies a novel syndrome with epilepsy, mental retardation, short stature, growth hormone deficiency, and hypogonadism.

Abstract:

BACKGROUND:Most mitochondrial and cytoplasmic aminoacyl-tRNA synthetases (aaRSs) are encoded by nuclear genes. Syndromic disorders resulting from mutation of aaRSs genes display significant phenotypic heterogeneity. We expand aaRSs-related phenotypes through characterization of the clinical and molecular basis of a novel autosomal-recessive syndrome manifesting severe mental retardation, ataxia, speech impairment, epilepsy, short stature, microcephaly, hypogonadism, and growth hormone deficiency. RESULTS:A G>A variant in exon 29 of VARS2 (c.3650G>A) (NM_006295) was identified in the index case. This homozygous variant was confirmed by Sanger sequencing and segregated with disease in the family studied. The c.3650G>A change results in alteration of arginine to histidine at residue 1217 (R1217H) of the mature protein and is predicted to be pathogenic. CONCLUSIONS:These findings contribute to a growing list of aaRSs disorders, broadens the spectrum of phenotypes attributable to VARS2 mutations, and provides new insight into genotype-phenotype correlations among the mitochondrial synthetase genes.

journal_name

Hum Genomics

journal_title

Human genomics

authors

Alsemari A,Al-Younes B,Goljan E,Jaroudi D,BinHumaid F,Meyer BF,Arold ST,Monies D

doi

10.1186/s40246-017-0124-4

subject

Has Abstract

pub_date

2017-11-14 00:00:00

pages

28

issue

1

eissn

1473-9542

issn

1479-7364

pii

10.1186/s40246-017-0124-4

journal_volume

11

pub_type

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