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Genotyping microsatellite DNA markers at putative disease loci in inbred/multiplex families with respiratory chain complex I deficiency allows rapid identification of a novel nonsense mutation (IVS1nt −1) in the NDUFS4 gene in Leigh syndrome
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Genotyping microsatellite DNA markers at putative disease loci in inbred/multiplex families with respiratory chain complex I deficiency allows rapid identification of a novel nonsense mutation (IVS1nt −1) in the NDUFS4 gene in Leigh syndrome
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Genotyping microsatellite DNA markers at putative disease loci in inbred/multiplex families with respiratory chain complex I deficiency allows rapid identification of a novel nonsense mutation (IVS1nt −1) in the NDUFS4 gene in Leigh syndrome
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Journal Article
Genotyping microsatellite DNA markers at putative disease loci in inbred/multiplex families with respiratory chain complex I deficiency allows rapid identification of a novel nonsense mutation (IVS1nt −1) in the NDUFS4 gene in Leigh syndrome
2003
Overview
Complex I deficiency, the most common cause of mitochondrial disorders, accounts for a variety of clinical symptoms and its genetic heterogeneity makes identification of the disease genes particularly tedious. Indeed, most of the 43 complex I subunits are encoded by nuclear genes, only seven of them being mitochondrially encoded. In order to offer urgent prenatal diagnosis, we have studied an inbred/multiplex family with complex I deficiency by using microsatellite DNA markers flanking the putative disease loci. Microsatellite DNA markers have allowed us to exclude the NDUFS7, NDUFS8, NDUFV1 and NDUFS1 genes and to find homozygosity at the NDUFS4 locus. Direct sequencing has led to identification of a homozygous splice acceptor site mutation in intron 1 of the NDUFS4 gene (IVS1nt -1, G-->A); this was not found in chorion villi of the ongoing pregnancy. We suggest that genotyping microsatellite DNA markers at putative disease loci in inbred/multiplex families helps to identify the disease-causing mutation. More generally, we suggest giving consideration to a more systematic microsatellite analysis of putative disease loci for identification of disease genes in inbred/multiplex families affected with genetically heterogeneous conditions.
Publisher
Springer,Springer Nature B.V
Subject
Biological and medical sciences
/ DNA
/ Female
/ Fundamental and applied biological sciences. Psychology
/ Genes
/ Humans
/ Male
/ Mitochondrial Diseases - genetics
/ Molecular and cellular biology
/ Muscle, Skeletal - enzymology
/ Muscle, Skeletal - metabolism
/ NADH, NADPH Oxidoreductases - deficiency
/ NADH, NADPH Oxidoreductases - genetics
/ Pedigree
