ArticleBiochemical and biophysical research communications2019
Electrostatic interactions in the force-generating region of the human cardiac myosin modulate ADP dissociation from actomyosin.
Article in Biochemical and biophysical research communications, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 7 citations in OpenAlex.
- Myosin Post-Translational Modifications Associated With Critical Illness Myopathy.Acta physiologica (Oxford, England) · 2026Article
- Unraveling Mutation-Induced Protein Communication Pathways in the Actomyosin Complex: Insights from Comprehensive Metadynamics Simulations.The journal of physical chemistry. B · 2025Article
- Virus-free transfection, transient expression, and purification of human cardiac myosin in mammalian muscle cells for biochemical and biophysical assays.Scientific reports · 2023Article
- Electrostatic interaction of loop 1 and backbone of human cardiac myosin regulates the rate of ATP induced actomyosin dissociation.Journal of muscle research and cell motility · 2022Article
- The Local Environment of Loop Switch 1 Modulates the Rate of ATP-Induced Dissociation of Human Cardiac Actomyosin.International journal of molecular sciences · 2022Article
- Electrostatic interactions in the SH1-SH2 helix of human cardiac myosin modulate the time of strong actomyosin binding.Journal of muscle research and cell motility · 2021Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
Human cardiac myosin has two isoforms, alpha and beta, sharing significant sequence similarity, but different in kinetics: ADP release from actomyosin is an order of magnitude faster in the alpha myosin isoform. Apparently, small differences in the sequence are responsible for distinct local inter-residue interactions within alpha and beta isoforms, leading to such a dramatic difference in the rate of ADP release. Our analysis of structural kinetics of alpha and beta isoforms using molecular dynamics simulations revealed distinct dynamics of SH1:SH2 helix within the force-generation region of myosin head. The simulations showed that the residue R694 of the helix forms two permanent salt bridges in the beta isoform, which are not present in the alpha isoform. We hypothesized that the isoform-specific electrostatic interactions play a role in the difference of kinetic properties of myosin isoforms. We prepared R694N mutant in the beta isoform background to destabilize electrostatic interactions in the force-generating region of the myosin head. Our experimental data confirm faster ADP release from R694N actomyosin mutant, but is not as dramatic as the difference of kinetics of ADP release in the alpha and beta isoforms.
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