タンパク質の構造と機能の制御は,ナノ粒子のスケーフードによる表面認識によって調整されます
Rui Hong1, Nicholas O Fischer, Ayush Verma
1Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Journal of the American Chemical Society
|January 22, 2004
まとめ
チオアルキル化オリゴ ((エチレングリコール)) リガンドを用い,キモトリプシンと認識された機能化されたナノ粒子基板. 異なるリガンド終結は,制御された酵素相互作用,抑制,および可逆的な活性回復を可能にしました.
科学分野:
- ナノテクノロジー ナノテクノロジー
- バイオケミストリー バイオケミストリー
- 表面化学について
背景:
- オリゴ ((エチレングリコール)) (OEG) リガンドは,ナノ粒子機能化に不可欠です.
- 表面認識と制御された相互作用は,バイオセンシングと薬物投与の鍵です.
研究 の 目的:
- 水に溶けるカドミウムセレニド (CdSe) のナノ粒子構造物を製造するために.
- 機能化されたナノ粒子・スキャファードを使用してキモトリプシン (ChT) の表面認識を達成する.
- 異なるレベルの相互作用とその可逆性を調査する.
主な方法:
- 多様な鎖末端機能を持つチオアルキルおよびチオアルキル化OEGリガンドの合成.
- これらのリガンドを使用した水溶性CdSeナノ粒子構造物の製造.
- 表面認識とキモトリプシン (ChT) との相互作用の実証.
主要な成果:
- リガンドの終結に基づいて,ChTとの3つの異なる相互作用レベルが達成されました:相互作用なし,変性化による阻害,構造的保持による可逆的阻害.
- カーボキシラート末端のOEGリガンドは,可逆性ChT阻害を可能にし,イオン強度を増やすことで活性が回復しました.
- ハイドロキシル末端のOEGは相互作用を示さなかったが,カルボキシラート末端のチオアルキルリガンドはデナチュレーションによる阻害を引き起こした.
結論:
- 機能化されたナノ粒子構造は,酵素の相互作用を正確に制御することができます.
- リガンドの設計は,特定の結合,阻害,および酵素活動の可逆的調節を達成するために重要である.
- このプラットフォームは,高度なバイオセンサと制御された酵素配送システムを開発する可能性を秘めています.
関連する概念動画
Protein Folding
Overview
Protein and Protein Structure
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme can...
A protein's shape is critical to its function. For example, an enzyme can...
Ligand Binding Sites
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-protein Interfaces
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
Protein Folding
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Assembly of Signaling Complexes
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.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...


