分散型DNAベースのシステムの持続的,可逆的,適応的非均衡の安定状態
James D Nicholas1,2, Erica Del Grosso3, Andrew J deMello4
1Departament de Ciència de Materials i Química Física, Universitat de Barcelona, C/ Martí i Franquès, 1-11, Barcelona, 08028, Spain.
Angewandte Chemie (International ed. in English)
|August 30, 2025
まとめ
研究者は自然を模倣する新しいDNAシステムを開発し,継続的な非均衡の安定状態 (NESS) を達成するために継続的な燃料供給を使用しました. これは従来のバッチ方法とは異なり,リアルタイムの適応と制御を可能にします.
科学分野:
- 超分子化学
- 化学システム生物学
- DNA ナノテクノロジー
背景:
- 自然は,適応可能な非均衡の安定状態 (NESS) を維持するために,継続的なエネルギー分散を利用します.
- 既存の化学燃料駆動の 超分子システムは しばしばバッチ添加に依存し 暫定的な状態につながります
- DNAベースのシステムは エネルギー散布メカニズムを調査しています
研究 の 目的:
- 消散性DNA鎖移転反応における持続的な非均衡安定状態 (NESS) を実証する.
- 生物の適応性を模倣するシステムを 開発する
- DNAナノシステムに即時制御を 実現するために
主な方法:
- 消散性DNA鎖移動反応を利用した.
- 継続的なRNA燃料供給のためのカスタム自動化されたオープンセミバッチ原子炉を使用した.
- 実行可能な調節可能な燃料注入率と現地分析
- 反応ネットワークを分析し,安定状態を確認するために,運動モデリングを適用した.
主要な成果:
- 継続的なRNA燃料注入によって持続的な非均衡の安定状態 (NESS) を達成した.
- 燃料供給の変動にリアルタイムでダイナミックに適応し,生物学的システムに似ています.
- 観測された安定状態は,運動モデリングによる真の非均衡組成を表していることが確認されました.
- バッチ条件と比較して優れたオン・ザ・フライ制御を示した.
結論:
- DNAナノシステムの持続的なNESSは,オープンな原子炉での継続的な燃料供給によって達成できます.
- このアプローチは ダイナミックな適応力と 精密な制御を 提供し 生物学的システムを反映します
- 開発されたシステムは,先進的なDNAベースのナノテクノロジーと化学生物学のための新しいプラットフォームを提供します.
関連する概念動画
Non-equilibrium in the Cell
4.8K
An important concept in studying metabolism and energy is that of chemical equilibrium. Most chemical reactions are reversible. They can proceed in both directions, releasing energy into their environment in one direction, and absorbing it from the environment in the other direction. The same is true for the chemical reactions involved in cell metabolism, such as the breaking down and building up of proteins into and from individual amino acids, respectively. Reactants within a closed system...
4.8K
Entropy within the Cell
11.4K
A living cell's primary tasks of obtaining, transforming, and using energy to do work may seem simple. However, the second law of thermodynamics explains why these tasks are harder than they appear. None of the energy transfers in the universe are completely efficient. In every energy transfer, some amount of energy is lost in a form that is unusable. In most cases, this form is heat energy. Thermodynamically, heat energy is defined as the energy transferred from one system to another that...
11.4K
Dynamic Equilibrium
53.3K
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;...
53.3K
Entropy Change in Reversible Processes
2.7K
In the Carnot engine, which achieves the maximum efficiency between two reservoirs of fixed temperatures, the total change in entropy is zero. The observation can be generalized by considering any reversible cyclic process consisting of many Carnot cycles. Thus, it can be stated that the total entropy change of any ideal reversible cycle is zero.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
2.7K
Overview of DNA Repair
31.6K
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
Chemically...
31.6K
DNA Topoisomerases
32.0K
Topoisomerases are enzymes that relax overwound DNA molecules during various cell processes, including DNA replication and transcription. These enzymes regulate positive and negative DNA supercoiling without changing the nucleotide sequence. DNA overwinding in a clockwise direction results in positively supercoiled DNA, whereas underwinding in a counterclockwise direction produces negatively supercoiled DNA.
Types and Mechanism of action
Topoisomerases are divided into two main types. ...
Types and Mechanism of action
Topoisomerases are divided into two main types. ...
32.0K


