title: Identification of a novel MYBPC3 gene variant in a patient with hypertrophic cardiomyopathy.
abstract: Hypertrophic cardiomyopathy (HCM) is a genetic disorder characterized by cardiac hypertrophy caused by mutations in sarcomere protein genes. MYBPC3 mutations are reported as a frequent cause of HCM. We aimed to identify the gene mutation underlying HCM in an Italian patient and his family composed of 13 relatives. Mutation screening of 658 known mutations was performed using a rapid and efficient mutation detection system based on semiautomated MALDI-TOF mass spectrometry using the Sequenom MassArray System and iPLEX Gold genotyping chemistry. Subsequently, direct sequencing of the coding exons and flanking intronic regions was performed for the most suitable HCM genes (MYBPC3, MYH7, TNNT2, TNNI3, and TPM1) in the index patient. We found a novel MYBPC3 gene mutation: G13999T (Gln689His). No other sarcomere gene mutation was found in this family. This genetic variant, which changes the last amino acid of MYBPC3 exon 21, affects a highly conserved residue. Furthermore, the Gln689His does not appear in public databases and has never been described as a polymorphism. The potential pathogenic role of this novel mutation was underlined by its absence in a sample of healthy subjects (n = 122) from the general Italian population. In summary, a novel MYBPC3 gene mutation has been identified in a patient affected by HCM, whereas it was absent in 244 reference alleles.
authors.affiliation: Hospital-University Complex of Santiago, Santiago de Compostela, Spain.
authors.forename: Maria
authors.initials: M
authors.lastname: Brion
authors.forename: Catarina
authors.initials: C
authors.lastname: Allegue
authors.forename: Rocio
authors.initials: R
authors.lastname: Gil
authors.forename: Alejandro
authors.initials: A
authors.lastname: Blanco-Verea
authors.forename: Angel
authors.initials: A
authors.lastname: Carracedo
authors.forename: Erika
authors.initials: E
authors.lastname: Pagannone
authors.forename: Anna
authors.initials: A
authors.lastname: Evangelista
authors.forename: Sara
authors.initials: S
authors.lastname: Di Castro
authors.forename: Simona
authors.initials: S
authors.lastname: Marchitti
authors.forename: Rosita
authors.initials: R
authors.lastname: Stanzione
authors.forename: Massimo
authors.initials: M
authors.lastname: Volpe
authors.forename: Speranza
authors.initials: S
authors.lastname: Rubattu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002312:Cardiomyopathy, Hypertrophic / Q000235:genetics* / Q000473:pathology; D002352:Carrier Proteins / Q000235:genetics*; D004452:Echocardiography; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics*; D010375:Pedigree; D011379:Prognosis; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D055815:Young Adult; D000099163:Myosin Binding Protein C
chemical_list: D002352:Carrier Proteins; D000099163:Myosin Binding Protein C