Key result
The R453C mutation in human β-cardiac myosin caused a ~30% decrease in maximum ATPase and in vitro velocity, but a 50% increase in intrinsic motor force compared with wild type.
Why the study?
Does the R453C mutation alter the biomechanical properties of human β-cardiac myosin compared to wild type?
Does the R453C mutation alter the biomechanical properties of human β-cardiac myosin compared to wild type?
The R453C mutation in human β-cardiac myosin increases intrinsic force by 50%, predicting a hypercontractile state in the heart muscle of patients with hypertrophic cardiomyopathy.
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May support hypercontractile HCM phenotype; hypothesis-generating for myosin-targeted therapies, pending human data.
Sommese et al. (2013) studied Hypertrophic cardiomyopathy. R453C mutation in human β-cardiac myosin vs. Wild type was evaluated on Biomechanical properties (maximum ATPase, in vitro velocity, intrinsic force). The R453C mutation in human β-cardiac myosin caused a ~30% decrease in maximum ATPase and in vitro velocity, but a 50% increase in intrinsic motor force compared with wild type.
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