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Updated: Sep 25, 2025

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
Published on: August 20, 2019
Novel IL2RG Gene Mutation in One of Dizygotic Twins Causing Profound Changes of Receptor Structure
Magdalena Rutkowska-Zapała1, Anna Szaflarska1, Anna Kluczewska1
1Department of Clinical Immunology, Institute of Paediatrics, Jagiellonian University Medical College, Kraków, Poland.
Abstract:
In this study, we report a 4-month-old boy with T-B+NK- severe combined immunodeficiency (SCID) due to a novel mutation in exon 2 of IL2RG, the gene encoding the interleukin (IL) common gamma chain (γc) of the cytokine receptors for IL-2, IL-4, IL-7, IL-9, IL-15, and IL-21. The patient was born from a twin pregnancy. He manifested recurrent infections of the gastrointestinal tract, whereas his twin brother was asymptomatic with no immune defects. In order to evaluate the effect of this unreported variant on the protein structure, a structural modeling process was performed showing prominent biochemical alterations of the protein features, including molecular weight, isoelectric charge, and possible changes to its secondary and tertiary structure.
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