Myosin Contractility
Myosin Contractility - Related Videos
07:15
A Cell-based Assay to Investigate Non-muscle Myosin II Contractility via the Folded-gastrulation Signaling Pathway in Drosophila S2R+ Cells
0 Views •
2018
Here we describe a contractility assay using Drosophila S2R+ cells. The application of an exogenous ligand, folded gastrulation (Fog), leads to the activation of the Fog signaling pathway and cellular contractility. This assay can be used to investigate the regulation of cellular contractility proteins in the Fog signaling pathway.
02:15
The Contractile Ring
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2023
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle. A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
02:15
The Contractile Ring
0 Views •
2021
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle. A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
08:08
Measurement of Cytosolic Ca2+ in Isolated Contractile Lymphatics
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Cited by 24 •
2011
We introduce an approach to evaluate the cytosolic Ca2+ concentration in isolated lymphatics to study Ca2+-dependent and Ca2+-sensitizing mechanisms of lymphatic smooth muscle contraction.
09:49
Procedures for Rat in situ Skeletal Muscle Contractile Properties
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Cited by 18 •
2011
This video demonstrates the surgical preparation and procedures needed to study the contractile responses of the rat medial gastrocnemius muscle preparation in situ. This preparation allows measurement of skeletal muscle contractile properties under physiological conditions. The animal is anesthetized and the muscle is separated from surrounding tissue at its distal end. The Achilles tendon is attached to a force transducer, allowing measurement of the muscle’s contractile response at 37...
FAQs
ATP hydrolysis supplies the energy that myosin heads use for force-producing conformational changes. After binding actin filaments, these changes promote filament sliding, so chemical energy becomes mechanical work. The resulting force depends on coordinated motor activity, because individual molecular events can combine into tension across an actomyosin network. This conversion links molecular chemistry to cellular and tissue-scale mechanics.
Motor coordination determines whether actin filaments merely rearrange or whether the network develops measurable tension. When myosin activity is organized across the network, local filament sliding can produce larger-scale contraction, supporting cell shape changes, tissue deformation, or movement. Network organization therefore provides a mechanistic bridge between molecular motors and collective behavior.
Mechanical environment becomes experimentally meaningful when force output is interpreted together with actomyosin organization. Measuring contractile force can show how strongly the system generates tension, while examining network organization indicates how that activity is spatially arranged. In bioengineering, comparing these readouts helps connect cellular mechanical responses with changes in the surrounding physical context.
A conceptual bioengineering workflow can study myosin motor activity, evaluate actomyosin network organization, measure contractile force, and relate those observations to cell shape, tissue deformation, or movement. This sequence connects molecular-scale events to macroscopic mechanics without treating force as an isolated readout. It also supports analysis of how cells respond to mechanical environments.
The process supports three complementary design areas: contractile cells, engineered tissues, and biomimetic materials. In each case, researchers can use myosin-driven force generation and actomyosin organization as variables for analyzing how the construct produces tension or changes form. This makes the mechanism useful for linking biological activity to the mechanical behavior of engineered systems.
Force and network measurements provide different but connected views of the same system. Contractile-force data report the mechanical output, whereas organization data reveal how actomyosin structure is arranged while producing that output. Considering both helps researchers interpret whether observed cell or tissue behavior reflects molecular motor activity, network-level coordination, or their combined effect.