Key result
Selective mutation of troponin C (e.g., E60A/E61A) abolished the activating effect of troponin while retaining its inhibitory function in Ca2+-dependent regulation of muscle contraction.
Population
Rabbit fast skeletal muscle troponin C (TnC)
Design
Preclinical
Authors
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May inform selective troponin modulation strategies; leaves open translation to human cardiac disease models.
Selective mutation of conserved acidic residues in the N-terminal domain of troponin C can abolish the activating effect of troponin while retaining its inhibitory function, revealing complex protein-protein interactions in muscle contraction regulation.
Kobayashi et al. (1999) studied Muscle contraction regulation. Site-directed mutagenesis of troponin C (TnC) was evaluated on Actomyosin S1 ATPase activity and ternary complex formation. Selective mutation of troponin C (e.g., E60A/E61A) abolished the activating effect of troponin while retaining its inhibitory function in Ca2+-dependent regulation of muscle contraction.
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