A new intragenic polymorphism detected by the single-strand conformation polymorphism (SSCP) assay in the dystrophin gene.
We have employed the single strand conformation polymorphism (SSCP) technique to examine a group of patients with Duchenne or Becker muscular dystrophy who do not contain deletions detectable by multiplex PCR or Southern/cDNA, in an attempt to identify uncommon mutations within the dystrophin gene. In SSCP analysis, a mutated sequence can be detected as a change of mobility in a nondenaturing polyacrylamide gel. During the course of this investigation, we detected and characterized a new polymorphism at the 3' end of intron 16. The G-to-T base change creates a TaqI restriction site which allows for rapid typing of the polymorphism by restriction digestion and electrophoresis of PCR amplified products. Its localization inside the 5' region of the dystrophin gene and its high heterozygosity makes it a useful and easy tool for rapid carrier and prenatal diagnosis.
Tuffery
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INSERM U249, CRBM/CNRS UPR 8402, Laboratoire de Biochimie Génétique, Montpellier, France.
Demaille
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Claustress
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D001483:Base Sequence; D004247:DNA / Q000235:genetics; D004252:DNA Mutational Analysis; D015252:Deoxyribonucleases, Type II Site-Specific; D016189:Dystrophin / Q000235:genetics*; D005260:Female; D005821:Genetic Techniques; D006801:Humans; D007438:Introns; D008297:Male; D008969:Molecular Sequence Data; D009136:Muscular Dystrophies / Q000175:diagnosis / Q000235:genetics*; D010375:Pedigree; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic
D016189:Dystrophin; D004247:DNA; D015252:Deoxyribonucleases, Type II Site-Specific; C027046:TCGA-specific type II deoxyribonucleases