Related Experiment Video
Updated: Dec 24, 2025

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
Published on: August 20, 2019
A New Mutation in IDS Gene Causing Hunter Syndrome: A Case Report
Caio Perez Gomes1, Maryana Mara Marins1, Fabiana Louise Motta1
1Center for Research and Molecular Diagnosis of Genetic Diseases, Department of Biophysics, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil.
Mucopolysaccharidosis type II (Hunter syndrome) is a genetic disorder caused by a deficiency in the iduronate-2-sulfatase (I2S) enzyme. A novel mutation in the IDS gene was identified as pathogenic, explaining the patient's severe symptoms.
Area of Science:
- Genetics
- Biochemistry
- Pediatrics
Background:
- Mucopolysaccharidosis type II (Hunter syndrome) is an X-linked disorder resulting from iduronate-2-sulfatase (I2S) deficiency.
- Clinical features include skeletal deformities, airway obstruction, cardiomyopathy, and neurological decline.
Observation:
- A 5-year-old boy presented with developmental delay, hearing loss, hepatosplenomegaly, and skeletal dysplasia.
- Diagnosis of mucopolysaccharidosis type II was confirmed via clinical, biochemical, and genetic evaluations.
Findings:
- A novel hemizygous mutation (c.879-1210_1007-218del) was identified in the IDS gene.
- This mutation was classified as pathogenic, correlating with the patient's mucopolysaccharidosis type II phenotype.
Implications:
- This finding expands the known spectrum of IDS gene mutations.
- Highlights the importance of genetic analysis in diagnosing rare genetic disorders like Hunter syndrome.
More Related Videos
03:45Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
12:49Mutagenesis and Analysis of Genetic Mutations in the GC-rich KISS1 Receptor Sequence Identified in Humans with Reproductive Disorders
Published on: September 4, 2011
Related Concept Videos
Incomplete Dominance
Lethal Alleles
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Single Nucleotide Polymorphisms-SNPs
Genetic Lingo
Pleiotropy
Exon Recombination
Exon shuffling follows “splice frame rules.” Each exon...