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関連する概念動画

Enzyme Kinetics01:19

Enzyme Kinetics

Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction.
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
Dynamic Equilibrium02:20

Dynamic Equilibrium

A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:

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酵素無核酸ダイナミックシステム

Niranjan Srinivas1, James Parkin2, Georg Seelig3

  • 1Computation and Neural Systems, California Institute of Technology, Pasadena, CA 91125, USA. niranjan@dna.caltech.edu david.soloveichik@utexas.edu.

Science (New York, N.Y.)
|December 16, 2017
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まとめ
この要約は機械生成です。

研究者は DNAベースの分子プログラミング言語を開発し 複雑な化学的動態を設計しました この突破は 単純なDNAの相互作用が 複雑な振る舞いを自律的に生み出し 分子システムに 新たな道を開くことを示しています

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科学分野:

  • 分子生物学
  • 化学工学
  • システム化学

背景:

  • 複雑な化学的動態は 遺伝子制御ネットワークのような自然系で観察されますが 設計は困難です
  • 既存の合成アプローチはしばしば複雑な酵素に依存し,プログラム性が欠けている.
  • 複雑なダイナミクスのためのよりシンプルな,新しい分子メカニズムが課題です.

研究 の 目的:

  • シンプルな分子メカニズムが 複雑でダイナミックな振る舞いを 示すことができるか調べる
  • 合成化学反応ネットワークを設計するための分子プログラミング言語を開発する.
  • DNAの構成要素を用いた 自律的な分子システムの実現可能性を実証する.

主な方法:

  • 複雑なダイナミクスのプログラミング言語として抽象化学反応ネットワークを提案した.
  • これらのネットワークを体系的に構築するために合成DNA分子を実装しました.
  • 重要な設計原理に基づいて設計プロセスを自動化するためのコンパイラを開発しました.

主要な成果:

  • DNAコンポーネントだけを使って オシレータを成功裏に設計し 作りました
  • ワトソン・クリックの塩基配列の相互作用が複雑な化学動力学に十分であることを確認した.
  • 自律的な動的システムを作るための分子プログラミングの概念を検証した.

結論:

  • 単純な分子プログラミング言語は 複雑な化学的動態を生み出します
  • 自律的な分子システムは 合成DNAと計算ツールを使って設計できます
  • この研究は,新しい分子機械と機能を設計するための基礎を提供します.