PMID: 9535554Apr 16, 1998Paper

Identification of two novel mutations in the ventricular regulatory myosin light chain gene (MYL2) associated with familial and classical forms of hypertrophic cardiomyopathy

Journal of Molecular Medicine : Official Organ of the Gesellschaft Deutscher Naturforscher Und Ärzte
J FlavignyB Hainque

Abstract

Five disease genes encoding sarcomeric proteins and associated with familial and classical forms of hypertrophic cardiomyopathy have been determined since 1989. In 1996 two other genes encoding ventricular regulatory and essential myosin light chains were shown to be associated with a particular phenotype of the disease characterized by mid left ventricular obstruction. The aim of the present study was to search for mutations in the ventricular regulatory myosin light chain gene (MYL2), located on chromosome 12q23q24.3, in a panel of 42 probands presenting a classical phenotype of familial hypertrophic cardiomyopathy. Single-strand conformation polymorphism analysis was used to search for mutations in the coding segments of the MYL2 gene, and the abnormal products were sequenced. Two novel missense mutations, Phe18Leu in exon 2 and Arg58Gln in exon 4 were identified in three unrelated families. None of the affected patients had hypertrophy localized only at the level of the papillary muscle with mid left ventricular obstruction. By analysis of genetic recombinations, one of these mutations identified in a large family allowed us to refine the localization of the MYL2 gene on the genetic map, in an interval of 6 cM containing si...Continue Reading

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