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Updated: Aug 20, 2025

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
Published on: August 20, 2019
Aminoacylation-defective bi-allelic mutations in human EPRS1 associated with psychomotor developmental delay,
Danni Jin1, Sheree A Wek2, Ricardo A Cordova2
1Department of Chemistry and Biochemistry, Center for RNA Biology, Ohio State University, Columbus, Ohio, USA.
Abstract:
Aminoacyl-tRNA synthetases are enzymes that ensure accurate protein synthesis. Variants of the dual-functional cytoplasmic human glutamyl-prolyl-tRNA synthetase, EPRS1, have been associated with leukodystrophy, diabetes and bone disease. Here, we report compound heterozygous variants in EPRS1 in a 4-year-old female patient presenting with psychomotor developmental delay, seizures and deafness. Functional studies of these two missense mutations support major defects in enzymatic function in vitro and contributed to confirmation of the diagnosis.
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