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関連する概念動画

Assembly of Cytoskeletal Filaments01:18

Assembly of Cytoskeletal Filaments

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...
The Structure of Intermediate Filaments01:19

The Structure of Intermediate Filaments

The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm).  These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate filaments...
Formation of Intermediate Filaments00:57

Formation of Intermediate Filaments

Intermediate filaments are cytoskeletal proteins with higher tensile strength and flexibility than microfilaments and microtubules. Unlike the other two cytoskeletal proteins, intermediate filament formation lacks the enzymatic activity to hydrolyze nucleotides like ATP and GTP to generate energy for polymerization. Therefore, the formation of intermediate filaments is multistep self-assembly. The involvement of any accessory proteins in intermediate filament formation has not yet been reported.
Self-Locking Screw01:16

Self-Locking Screw

A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
Fimbriae, Pili, and Axial Filaments01:28

Fimbriae, Pili, and Axial Filaments

Fimbriae and pili are specialized bacterial surface structures that play pivotal roles in adhesion, genetic exchange, and motility. Composed primarily of pilin protein, these hairlike appendages are crucial for bacterial survival and pathogenicity in various environments.Fimbriae: Adhesion and PathogenicityFimbriae are fine, filamentous structures measuring 2–10 nanometers in diameter and are densely distributed on the bacterial cell surface. They facilitate bacterial adhesion to abiotic...

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関連する実験動画

Updated: Jul 20, 2026

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

五重ヘリクから組み立てられた相互接続されたキラルナノチューブ.

Yong Cui1, Suk Joong Lee, Wenbin Lin

  • 1Department of Chemistry, CB #3290, University of North Carolina, Chapel Hill 27599, USA.

Journal of the American Chemical Society
|June 6, 2003
PubMed
まとめ

研究者らは,ナノチューブに自己組み立てられる新しいホモキラル螺旋状の鎖を作り出した. これらのキラルナノチューブは,アロマティック分子に対する高い親和性を示し,エナチオセレクティブの応用のために機能化することができます.

科学分野:

  • 超分子化学 超分子化学
  • マテリアルサイエンス 材料科学
  • ナノテクノロジー ナノテクノロジー

背景:

  • キラルな超分子構造の発達は,先進的な材料にとって極めて重要です.
  • ホモキラル・ヘリカル・アセンブリは,ユニークな構造と機能の特性を有しています.

研究 の 目的:

  • 新規のホモキラル螺旋鎖を合成し,特徴づけること.
  • これらの鎖の自己組み立てをナノチューブルアーキテクチャに探求する.
  • これらのナノチューブの分子認識と分離における可能性を調査する.

主な方法:

  • C2対称の1,1-ビナフチル-6,6'-ビピリジンのリガンドの合理的合成.
  • Ni ((acac) 2) と協調してホモキラスの螺旋鎖を形成する.
  • パラレル関連ナノチューブへの自己組み立ての観察.
  • ナノチューブの壁にキラル・クラウン・エーサーを組み込む.

主要な成果:

  • ホモキラル螺旋鎖の合成に成功しました.
  • パラレルアソシエーションによる2x2nmナノチューブの形成.
  • ナノチューブをナノメートルスケールのチャネルを備えた秩序ある相互接続したアーキテクチャに絡める.

さらに関連する動画

Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control
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Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control

Published on: February 11, 2018

Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum
07:49

Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum

Published on: January 22, 2019

関連する実験動画

Last Updated: Jul 20, 2026

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control
06:16

Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control

Published on: February 11, 2018

Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum
07:49

Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum

Published on: January 22, 2019

  • アロマティック分子に対するナノチューブの高い親和性を実証した.
  • キラル・クラウン・エーサーの成功併用.

    • 結論:

    • 定義された寸法とチャネルを持つ新しいホモキラル螺旋ナノチューブが合成されました.
    • これらのナノチューブルアーキテクチャは,アロマティック分子の選択的結合を示す.
    • キラル・クラウン・エーサーの組み込みは,エナチオセレクティブ・プロセスのための新しいキラル・ゼオリート材料の可能性を開きます.