化学的に同一の足を持つ小分子ウォーカーの酵素媒介型方向輸送
Christopher J Martin1, Alan T L Lee1, Ralph W Adams1
1School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom.
Journal of the American Chemical Society
|August 2, 2017
まとめ
この研究では 酵素触媒を用いて 軌道に沿って方向的に移動する 分子ウォーカーが紹介されています この新しいメカニズムは 選択的な水解と足の再結合によって 方向的な動きを実現します
科学分野:
- 化学工学
- バイオテクノロジー
- 材料科学
背景:
- 分子機械はナノスケールの応用の可能性を備えています
- 分子レベルで 方向性のある動きを制御することは 依然として課題です
研究 の 目的:
- 小分子ウォーカーの設計と実証
- 精密な分子運動制御のための酵素触媒を使用します.
主な方法:
- カーボキシル酸の足を持つ二足の小分子ウォーカーが合成されました
- 移動は,エステル結合形成と断裂によって,ポリエーテル線に沿って達成された.
- リパースAS酵素は,エステル結合の選択的水解を触媒化し,情報ラッチとして作用した.
主要な成果:
- この酵素はマクロサイクライズされたウォーカーの裏足を 選択的に水解した.
- 再結合時に (S) ステレオセンターが形成され,水解が防止され,方向的な進行が確認された.
- 繰り返しマクロサイクリングと水解により,歩行者の68%が3つの足場を持つコースで2つの方向のステップを取った.
結論:
- 酵素触媒による選択的水解は,方向性分子運動のメカニズムを提供します.
- 開発されたウォーカーは 効率的な歩行能力と 軌道に沿った制御された動きを示しています
- この研究は 自律的な分子機械の設計に 新しいアプローチを提示しています
関連する概念動画
Drug Absorption Mechanism: Carrier-Mediated Membrane Transport
6.6K
Certain large, lipid-insoluble drug molecules that resemble amino acids, peptides, or glucose, require specialized carrier proteins to facilitate their diffusion across cell membranes. This transport can occur through either facilitated diffusion, which does not require energy input, or active transport, which does require energy input.
Facilitated diffusion is a passive process that utilizes human Solute Carrier (SLC) transporters. These transporters bind to the drug, undergo structural...
Facilitated diffusion is a passive process that utilizes human Solute Carrier (SLC) transporters. These transporters bind to the drug, undergo structural...
6.6K
The Movement of Organelles and Vesicles
6.8K
In eukaryotic cells, cytoskeletal filaments such as actin, microtubules, and intermediate filaments form a mesh-like cytoskeletal network. These filaments serve as tracks for transporting cellular cargo. Specialized motor proteins use the chemical energy stored in adenosine triphosphate (ATP) for this transport. During interphase, microtubules are polarized, with the plus-end towards the cell periphery and the minus-end towards the cell center. Two microtubule-associated motor proteins,...
6.8K
Facilitated Diffusion
1.4K
The plasma membrane, a critical structure in cellular biology, houses an array of transporters, or carrier proteins, interspersed within its lipid bilayer. These proteins play a crucial role in solute transport through facilitated diffusion, a form of passive diffusion that uses transporters to move the molecules across the membrane.
In this process, substrates such as organic compounds and ions interact with a transporter on one side, triggering conformational changes in proteins that enable...
In this process, substrates such as organic compounds and ions interact with a transporter on one side, triggering conformational changes in proteins that enable...
1.4K
Chemotaxis and Direction of Cell Migration
5.9K
Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
5.9K
Facilitated Transport
18.9K
The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
18.9K
Facilitated Transport
153.1K
The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
153.1K


