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A substitution mutation in the myosin binding protein C gene in ragdoll hypertrophic cardiomyopathy

Kathryn M Meurs1, Michelle M Norgard, Martina M Ederer

  • 1Department of Veterinary Clinical Sciences, Washington State University College of Veterinary Medicine, Pullman, WA 99164, USA. Meurs@vetmed.wsu.edu

Genomics
|May 25, 2007
PubMed

Insights

Two distinct MYBPC3 gene mutations cause hypertrophic cardiomyopathy (HCM) in unrelated cat breeds. This research identifies a new mutation in Ragdoll cats, highlighting independent genetic events in feline HCM.

Area of Science:

  • Genetics
  • Cardiology
  • Veterinary Medicine

Background:

  • Familial hypertrophic cardiomyopathy (HCM) is a common inherited heart disease.
  • Mutations in sarcomeric genes, such as MYBPC3, are known causes of HCM.
  • Feline HCM serves as a relevant large-animal model for studying human disease.

Purpose of the Study:

  • To identify the genetic cause of HCM in Ragdoll cats.
  • To investigate the specific MYBPC3 gene mutation in this breed.
  • To compare this mutation with previously identified feline MYBPC3 mutations.

Main Methods:

  • Genetic sequencing of the MYBPC3 gene in affected Ragdoll cats.
  • Analysis of mutation effects on protein structure and function.
  • Comparison of mutation location and breed lineage with previously identified feline HCM mutations.

Main Results:

  • A novel mutation in the MYBPC3 gene was identified in Ragdoll cats with HCM.
  • This mutation involves a change from arginine to tryptophan, altering protein structure.
  • The mutation is distinct from the one found in Maine Coon cats, indicating independent origins.

Conclusions:

  • Two separate, de novo MYBPC3 mutations cause HCM in unrelated feline breeds.
  • This underscores the genetic heterogeneity of feline HCM.
  • The MYBPC3 gene is a significant locus for inherited cardiomyopathies in both humans and cats.

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