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Related Concept Videos

Introduction to the Cytoskeleton01:33

Introduction to the Cytoskeleton

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Overview of the Cytoskeleton
The cytoskeleton is a network of protein filaments present within the cell, having three distinct filaments ̶   microfilaments, microtubules, and intermediate filaments. Each has characteristic features that distinguish them, including the dynamics of their assembly and disassembly, mechanical properties, polarity, and the type of molecular motors associated with them. Earlier, they were thought to be present only in eukaryotic cells; however, their...
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Synthetic Biology02:55

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Synthetic biology is an interdisciplinary science that involves using principles from disciplines such as engineering, molecular biology, cell biology, and systems biology. It involves remodeling existing organisms from nature or constructing completely new synthetic organisms for applications such as protein or enzyme production, bioremediation, value-added macromolecule production, and the addition of desirable traits to crops, to name a few.
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Assembly of Cytoskeletal Filaments01:18

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Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
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The cytoplasm consists of organelles and a framework of protein scaffolds called the cytoskeleton suspended in an aqueous solution, the cytosol. The cytosol is a rich broth of water, ions, salts, and various organic molecules.
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The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments in the cytoskeleton determines their ability to perform various functions within the cell. It can undergo rapid reorganization during processes like cell division or remain stable for several hours as in the interphase. The adaptability of these filaments depends on stringent regulatory mechanisms. The microfilament and microtubules of the...
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Studying the Cytoskeleton01:17

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The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...
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Related Experiment Video

Updated: Sep 7, 2025

Author Spotlight: Developing Synthetic Cells from Programmable Amphiphilic DNA Nanostructures
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Functional DNA-based cytoskeletons for synthetic cells.

Pengfei Zhan1,2, Kevin Jahnke3,4, Na Liu5,6

  • 12nd Physics Institute, University of Stuttgart, Stuttgart, Germany.

Nature Chemistry
|June 20, 2022
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Researchers created functional DNA-based cytoskeletons in cell-sized compartments. These synthetic structures mimic natural cell components, enabling programmable assembly and transport for synthetic cell development.

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Area of Science:

  • Biotechnology
  • Synthetic Biology
  • Nanotechnology

Background:

  • The cell's cytoskeleton is crucial for shape, organization, and function.
  • Developing synthetic cytoskeletons is key for bottom-up synthetic cell construction.
  • DNA nanotechnology offers programmability for creating biomimetic structures.

Purpose of the Study:

  • To demonstrate functional DNA-based cytoskeletons within microfluidic cell-sized compartments.
  • To engineer synthetic filaments mimicking natural cytoskeleton properties.
  • To explore applications in vesicle transport and nanoparticle delivery within confined environments.

Main Methods:

  • Self-assembly of DNA tiles into filament networks within cell-sized compartments.
  • Rational design of DNA filaments for controlled reversible assembly and polymerization.
  • Utilizing DNA hybridization and aptamer-target interactions for dynamic control.
  • Investigating guided vesicle and gold nanoparticle transport.

Main Results:

  • Successfully created functional DNA-based cytoskeletons in microfluidic compartments.
  • Demonstrated reversible assembly and ATP-triggered polymerization of synthetic filaments.
  • Showcased engineerable characteristics for controlled assembly and disassembly.
  • Explored autonomous transport of gold nanoparticles and guided vesicle movement.

Conclusions:

  • DNA nanotechnology provides a powerful platform for building functional synthetic cytoskeletons.
  • These synthetic cytoskeletons can mimic key features of natural systems.
  • This work advances the development of bottom-up synthetic cells.