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Related Concept Videos

Mechanical Protein Functions01:58

Mechanical Protein Functions

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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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Protein Diffusion in the Membrane01:24

Protein Diffusion in the Membrane

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Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
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Actin Polymerization and Cell Motility01:13

Actin Polymerization and Cell Motility

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Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate....
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Role of Myosin in Cell Migration01:18

Role of Myosin in Cell Migration

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Myosins are multimeric motor proteins involved in various cellular processes such as migration, adhesion, and proliferation. Myosin II is the most common type in animal cells, which binds and cross-links actin filaments.
Myosin II  is a hexamer comprising two heavy chains with globular heads and coiled-coil tails, two regulatory light chains, and two essential light chains. The ATPase sites on the myosin heads hydrolyze ATP, and the released phosphate generates the force for contraction....
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Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

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The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
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Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications
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Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications

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Emerging area: biomaterials that mimic and exploit protein motion.

William L Murphy1

  • 1Departments of Biomedical Engineering, Pharmacology, Orthopedics and Rehabilitation, University of Wisconsin, Madison, WI, 53706, USA.

Soft Matter
|September 13, 2014
PubMed
Summary

Researchers are developing new dynamic hydrogels that mimic natural protein movements for advanced bio-responsive materials. This approach promises highly specific responses to biochemical triggers for applications in medicine and engineering.

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Area of Science:

  • Biomaterials Science
  • Protein Engineering
  • Hydrogel Chemistry

Background:

  • Traditional dynamic hydrogels respond to simple physicochemical changes (pH, temperature).
  • A need exists for hydrogels with more specific biological responsiveness.
  • Nature's proteins offer a model for sophisticated bio-responsive materials due to their conformational changes.

Purpose of the Study:

  • To review the emerging strategy of using protein motions for designing dynamic hydrogels.
  • To highlight early examples of hydrogels harnessing protein dynamics.
  • To discuss challenges and future directions in this field.

Main Methods:

  • Focus on reviewing literature concerning protein motions in hydrogel design.
  • Analysis of early examples of dynamic hydrogels utilizing protein dynamics.
  • Discussion of challenges and future research avenues.

Main Results:

  • Early examples demonstrate the feasibility of using protein motions in synthetic hydrogels.
  • Protein-based hydrogels show potential for specific and multiplexed responses to biochemical triggers.
  • This approach leverages the inherent dynamic properties of natural proteins.

Conclusions:

  • Harnessing protein motions offers a novel paradigm for creating advanced dynamic hydrogels.
  • Protein-based hydrogels are promising for applications like drug delivery, biosensing, bioactuation, and tissue engineering.
  • This field holds potential for developing highly specific, biologically responsive materials.