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- W2015016514 abstract "Cardiac Troponin T (cTnT) is a central modulator of thin filament regulation of myofilament activation. The lack of structural data for the TNT1 tail domain, a proposed α-helical region, makes the functional implications of the FHC mutations difficult to determine. Studies have suggested that flexibility of TNT1 is important in normal protein-protein interactions within the thin filament. Our groups have previously shown through Molecular Dynamics (MD) simulations that some FHC mutations, Arg92Leu(R92L) and Arg92Trp(R92W), result in increased flexibility at a critical hinge region 12 residues distant from the mutation. To explain this distant effect and its implications for FHC mutations, we characterized the dynamics of wild type and mutational segments of cTnT using MD. Our data shows an opening of the helix between residues 105-110 in mutants. Consequently, the dihedral angles of these residues correspond to non-α-helical regions on Ramachandran plots. We hypothesize the removal of a charged residue decreases electrostatic repulsion between the point mutation and surrounding residues resulting in local helical compaction. Constrained ends of the helix and localized compaction results in expansion within the nearest non-polar helical turn from the mutation site, residues 105-109." @default.
- W2015016514 created "2016-06-24" @default.
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- W2015016514 date "2007-09-01" @default.
- W2015016514 modified "2023-09-26" @default.
- W2015016514 title "COMPUTATIONAL CHARACTERIZATION OF MUTATIONS IN CARDIAC TROPONIN T KNOWN TO CAUSE FAMILIAL HYPERTROPHIC CARDIOMYOPATHY" @default.
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- W2015016514 doi "https://doi.org/10.1142/s0219633607003271" @default.
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