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Related Concept Videos

Assembly of Complex Microtubule Structures01:32

Assembly of Complex Microtubule Structures

Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Protein Complex Assembly02:41

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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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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
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Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
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Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
12:33

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Published on: February 4, 2013

Hierarchical self-assembly of complex polyhedral microcontainers.

David J Filipiak1, Anum Azam, Timothy G Leong

  • 1Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, Maryland 21218.

Journal of Micromechanics and Microengineering : Structures, Devices, and Systems
|February 18, 2010
PubMed
Summary
This summary is machine-generated.

Researchers explored hierarchical self-assembly for creating complex 3D microstructures. This method, using self-correction, reduces errors in fabricating patterned polyhedra like dodecahedra and octahedra.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Microfabrication

Background:

  • Self-assembly is a key strategy for fabricating microstructures.
  • Previous work focused on simpler polyhedral shapes like cubes and pyramids.
  • Complex structures present challenges in error propagation during self-assembly.

Purpose of the Study:

  • To investigate hierarchical self-assembly of complex polyhedral microstructures.
  • To evaluate the effectiveness of hierarchical design and self-correction mechanisms.
  • To demonstrate a method for mass-producing patterned 3D microstructures.

Main Methods:

  • Utilizing surface tension-driven self-assembly.
  • Designing and fabricating regular dodecahedra and octahedra microstructures.
  • Implementing hierarchical design and self-correction strategies.

Main Results:

  • Observed successful hierarchical self-assembly of complex polyhedra (dodecahedra, octahedra).
  • Demonstrated significant reduction in self-assembly error propagation.
  • Achieved mass production of patterned 3D microstructures.

Conclusions:

  • Hierarchical self-assembly with self-correction is effective for complex microstructures.
  • This approach enables parallel and cost-effective fabrication.
  • Potential applications include cargo encapsulation and assembly of complex systems.