Alterations in Multi-Scale Cardiac Architecture in Association With Phosphorylation of Myosin Binding Protein-C.

ABSTRACT:

Background

The geometric organization of myocytes in the ventricular wall comprises the structural underpinnings of cardiac mechanical function. Cardiac myosin binding protein-C (MYBPC3) is a sarcomeric protein, for which phosphorylation modulates myofilament binding, sarcomere morphology, and myocyte alignment in the ventricular wall. To elucidate the mechanisms by which MYBPC3 phospho-regulation affects cardiac tissue organization, we studied ventricular myoarchitecture using generalized Q-space imaging (GQI). GQI assessed geometric phenotype in excised hearts that had undergone transgenic (TG) modification of phospho-regulatory serine sites to nonphosphorylatable alanines (MYBPC3(AllP-/(t/t))) or phospho-mimetic aspartic acids (MYBPC3(AllP+/(t/t))).

Methods and results

My

SUBMITTER: Taylor EN 

PROVIDER: S-EPMC4943261 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature