Motor Protein Myosin
Motor Protein Myosin - Related Videos
10:12
A Sensitive and Specific Quantitation Method for Determination of Serum Cardiac Myosin Binding Protein-C by Electrochemiluminescence Immunoassay
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Cited by 16 •
2013
Measuring biomarkers in complex biological samples is increasingly guiding clinical decision-making. We describe a highly sensitive method to simultaneously measure cardiac myosin binding protein-C, creatine kinase MB, and cardiac troponin I in serum samples from subjects with myocardial infarction and healthy control subjects.
03:39
Inverted Motility Assay: An In Vitro Technique to Visualize Myosin Movement on Immobilized Actin Filaments
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2025
In this video, we perform an in vitro motility assay to analyze the actin-myosin interactions. The gliding movement of actin filaments on immobilized myosin molecules is visualized using fluorescence microscopy.
01:32
Microtubule Associated Motor Proteins
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2023
Eukaryotic cells have different motor proteins for transporting various cargo within the cell. These motor proteins differ based on the filament they associate with, the direction they move within the cell, and the type of cargo they transport. Motor proteins that associate with microtubules are known as microtubule-associated motor proteins. There are two families of microtubule-associated motor proteins —Kinesins and Dyneins. Both these proteins assist in the transport of cellular cargos...
06:01
The Gliding Actin Filament Assay: An In Vitro Motility Assay to Study Translocation of Actin Filaments on Immobilized Myosins
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2025
In this video, we perform an in vitro motility assay to analyze the actin-myosin interactions. The gliding movement of actin filaments on immobilized myosin molecules is visualized using fluorescence microscopy.
02:55
Immunoprecipitation of Target Protein-DNA Complexes from Motor Neuron Lysate
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2025
This video demonstrates the immunoprecipitation of DNA fragments crosslinked with target protein from stem cell-derived motor neuron lysates using target protein-specific antibody-coated magnetic beads.
FAQs
Motor protein myosin converts chemical energy from ATP hydrolysis into mechanical action through changes in head conformation. When the heads interact with actin filaments, these changes can produce directed sliding, which is important for force generation, or support cargo transport within the cell. Thus, ATP availability and head movement connect molecular chemistry with larger-scale cellular motion.
Different myosin classes support distinct cellular roles because their molecular activities are adapted to different transport and force-generating tasks. Some participate in filament sliding, while others help move cargo. This diversity allows cells to use related ATP-powered machines for organization, membrane trafficking, migration, cytokinesis, and mechanosensing rather than relying on one universal myosin function.
Actin filaments provide the structures with which myosin heads interact, allowing conformational changes to generate directed movement. Depending on the cellular context, that interaction can slide filaments relative to one another or move cargo through the cell. Examining myosin-actin interactions therefore helps connect molecular force production with cellular organization, transport, and tissue-level function.
In muscle, myosin-generated force contributes to contraction through directed sliding involving actin filaments. During cytokinesis, the same general capacity to produce force and movement supports the physical organization required when a cell divides. These roles illustrate how myosin activity can operate in specialized tissues and in fundamental cellular processes, linking molecular mechanics to tissue function and cell reproduction.
Studying myosin structure shows how its molecular components support force generation and movement, while examining regulation helps explain how activity is controlled in different cellular settings. Analyzing interactions with actin connects these properties to cellular organization and transport. Together, these investigations provide a framework for explaining how molecular forces shape cells and tissues.
Myosin is relevant to research on cell migration, membrane trafficking, mechanosensing, and muscle function because it links ATP use to directed cellular activity. Its roles also make it important for investigating disorders involving muscle and cytoskeletal function. Comparing myosin behavior across these contexts can clarify how altered molecular force production affects cells, tissues, and overall biological function.