Transgenic mouse comprising a myosin heavy chain atpase loop 1 mutation
The invention provides a transgenic mouse that is a model for myocardial function. Also provided are methods for using the transgenic mouse model to study heart muscle, cardiac disease and identify compounds effective in treating or preventing cardiac disease.
1. A homozygous transgenic mouse having incorporated into its genome a transgene comprising a nucleic acid encoding a mouse cardiac alpha myosin heavy chain comprising an S342G mutation in ATPase loop 1 of the cardiac alpha myosin heavy chain, which reduces electrostatic interaction between ATPase loop 1 and interactive micro-domain of said cardiac alpha myosin heavy chain, thereby reducing an ADP dissociation rate of said mouse cardiac alpha heavy chain, wherein said mouse exhibits: (a) reduced contractility; and (b) increased power generating work capacity resulting in the transgenic mouse exhibiting a reduced heart rate.