title: Genetic analysis of Japanese patients with myophosphorylase deficiency (McArdle's disease): single-codon deletion in exon 17 is the predominant mutation.
abstract: We report molecular genetic analysis of 11 Japanese patients with myophosphorylase deficiency (McArdle's disease). Four reported mutations, frequently observed in patients with McArdle's disease, in exons 1, 5, 14 and 17 were investigated. Seven patients out of 11 were homozygous for a single-codon deletion at codon 708/709 in exon 17 and one patient was heterozygous for a single-codon deletion with an unknown mutant allele. In contrast, the predominant mutation reported in US and UK patients (CGA to TGA at codon 49 in exon 1), accounting for 75% and 83% of the cases, respectively, was not found in any of the Japanese patients. Results suggest that the predominant mutation in Japanese patients is a single-codon deletion at codon 708/709 in exon 17 (found in 73% of our patients) and differs from the most common mutation in US or UK patients.
authors.affiliation: Department of Pediatric Neurology, Hamamatsu City Medical Center for Developmental Medicine, Shizuoka, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Sugie
authors.forename: Y
authors.initials: Y
authors.lastname: Sugie
authors.forename: M
authors.initials: M
authors.lastname: Ito
authors.forename: T
authors.initials: T
authors.lastname: Fukuda
authors.forename: I
authors.initials: I
authors.lastname: Nonaka
authors.forename: Y
authors.initials: Y
authors.lastname: Igarashi
mesh_terms: D000293:Adolescent; D000328:Adult; D001483:Base Sequence; D003062:Codon; D004247:DNA / Q000032:analysis*; D004591:Electrophoresis, Polyacrylamide Gel; D005091:Exons; D005260:Female; D017353:Gene Deletion; D006012:Glycogen Storage Disease Type V / Q000235:genetics*; D006801:Humans; D007564:Japan; D008297:Male; D008969:Molecular Sequence Data; D009132:Muscles / Q000201:enzymology; D009154:Mutation; D006005:Phosphorylases / Q000032:analysis / Q000172:deficiency / Q000235:genetics*; D017384:Sequence Deletion
chemical_list: D003062:Codon; D004247:DNA; D006005:Phosphorylases