Key result
The presence of nucleotides induced a transition in the actomyosin interface, altering the interaction between myosin subfragment 1 and actin as detected by Fab(1-7) antibodies.
Population
Actin and myosin subfragment 1 (S-1) proteins
Comparison
Nucleotides and Fab antibodies against the first… vs Absence of nucleotides (rigor conditions)
Design
Preclinical
Authors
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Caution against clinical translation from this Level 5 animal study; leaves open mechanistic extension to cardiac contractility models.
The study demonstrates a nucleotide-induced transition in the actomyosin interface, indicating different roles of the N-terminal segment of actin in binding S-1 depending on the presence of nucleotides.
Dasgupta et al. (1991) studied this question. Nucleotides (MgAMP.PNP, MgADP, MgPPi) vs. Absence of nucleotides was evaluated on Binding of myosin subfragment 1 (S-1) to actin. The presence of nucleotides induced a transition in the actomyosin interface, altering the interaction between myosin subfragment 1 and actin as detected by Fab(1-7) antibodies.
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