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Related Concept Videos

Tension Response at Adherens Junctions01:26

Tension Response at Adherens Junctions

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The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
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Cell-matrix's Response to Mechanical Forces01:13

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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
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Transducer Mechanism: Nuclear Receptors01:31

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Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
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Mechanical Protein Functions01:58

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Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force. 
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Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
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Energy to Drive Translocation01:37

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Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
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Related Experiment Video

Updated: Feb 27, 2026

Combining 3D Magnetic Force Actuator and Multi-Functional Fluorescence Imaging to Study Nucleus Mechanobiology
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Combining 3D Magnetic Force Actuator and Multi-Functional Fluorescence Imaging to Study Nucleus Mechanobiology

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Nuclear mechanotransduction: sensing the force from within.

Avathamsa Athirasala1, Nivi Hirsch2, Amnon Buxboim3

  • 1Alexander Grass Center for Bioengineering, School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.

Current Opinion in Cell Biology
|June 23, 2017
PubMed
Summary

The cell nucleus senses physical forces and stiffness, converting mechanical tension into biochemical signals. This nuclear mechanotransduction influences cell fate decisions through intricate regulatory networks.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Mechanobiology

Background:

  • The cell nucleus, central to eukaryotic life, regulates gene expression, DNA replication, and repair.
  • Beyond molecular functions, the nucleus possesses physical properties enabling mechanical tasks.
  • Nuclear mechanotransduction integrates external forces and matrix stiffness via cytoskeletal and nucleoskeletal connections.

Purpose of the Study:

  • To elucidate the mechanisms of nuclear mechanotransduction.
  • To understand how the nucleus senses and responds to physical cues.
  • To explore the role of nuclear mechanics in cell-fate determination.

Main Methods:

  • Investigating the physical connectivity from the extracellular environment to the nucleoskeleton.
  • Analyzing the role of nuclear mechanosensor elements in force transduction.
  • Examining mechanoregulatory networks involving lamins, chromatin, and cytoskeletal elements.

Main Results:

  • Nuclear mechanotransduction pathways are activated by external forces and matrix stiffness.
  • Nuclear mechanosensors translate mechanical tension into biochemical signaling.
  • Mechanoregulatory networks stabilize cellular states and provide feedback to cellular components.

Conclusions:

  • The nucleus actively senses and responds to mechanical stimuli.
  • Nuclear mechanics plays a crucial role in cell-fate decision-making.
  • Understanding nuclear mechanotransduction offers insights into cellular regulation and disease.