Abstract |
Cystinuria, one of the first inborn errors of metabolism, is characterized by hyperexcretion of cystine, arginine, lysine, and ornithine into urine. Cystinuria is genetically classified into types A and B. Mutations in the SLC3A1 gene lead to type A, and type B is caused by mutations in the SLC7A9 gene. We described a 19-year-old woman that had early onset of cystine calculus formation at the age of 3 years. After DNA extraction and polymerase chain reaction, direct sequencing was performed. By these methods, a novel nucleotide substitution c.177G>A in exon 3 of the SLC7A9 gene was found, which had not been reported elsewhere previously. This nucleotide substitution occurs in the extracellular domain of the SLC7A9 gene. In addition, a previously described intron variant c.1136+2/3delT (intron 6 of SLC3A1) in homozygosity status was detected in the patient. To our knowledge, this is the first report of novel nucleotide substitution c.177G>A in exon 3 of the SLC7A9 gene.
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Authors | Leila Koulivand, Mehrdad Mohammadi, Behrouz Ezatpour, Majid Kheirollahi |
Journal | Iranian journal of kidney diseases
(Iran J Kidney Dis)
Vol. 9
Issue 1
Pg. 63-6
(Jan 2015)
ISSN: 1735-8604 [Electronic] Iran |
PMID | 25599739
(Publication Type: Case Reports, Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Amino Acid Transport Systems, Basic
- SLC7A9 protein, human
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Topics |
- Amino Acid Transport Systems, Basic
(genetics)
- Cystinuria
(diagnosis, genetics)
- DNA Mutational Analysis
- Exons
- Female
- Genetic Predisposition to Disease
- Heterozygote
- Homozygote
- Humans
- Introns
- Mutation
- Phenotype
- Young Adult
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