均衡外動的共電化学による折り畳み器と自己複製器の同時形成
Ankush Sood1, Pradeep K Mandal2, Jim Ottelé1
1Centre for Systems Chemistry, Stratingh Institute for Chemistry, Nijenborgh 3, 9747 AGGroningen,The Netherlands.
Journal of the American Chemical Society
|November 26, 2024
まとめ
この研究は 単一のブロックが 自己複製体と 折り畳み体の両方を 形成する方法を示しています 分散化学により 生命のようなシステムが 化学燃料によって制御され 均衡状態から外れた状態で共存できるのです
科学分野:
- システム化学
- 合成生物学
- 化学的自己組み立て
背景:
- システム化学は,組み立て経路の制御を必要とする,生命のような分子システムを創造することを目的としています.
- 分散性化学燃料は 暫定的な構造の形成を可能にします
研究 の 目的:
- 一つのブロックから 合成ダイナミック・コンビネトリアル・ライブラリを作成します
- 競合する経路で自己複製体と折り畳み体の出現を証明する.
- 分散化学を用いてこれらの集合体の共存を制御する.
主な方法:
- ダイナミックなコンビネトリアルライブラリを形成するために,単一の,構造的にシンプルなブロックを使用しました.
- 自己複製器の存在下で一時的にフォルダマーを生成する燃料化学反応サイクルを使用しています.
- 化学燃料濃度を調整することによって,制御された経路分割と反応期間.
- 絶え間なく動かすタンク用原子炉を用いて,均衡状態の外の安定状態を達成した.
主要な成果:
- 単一のブロックから自己複製器 (分子間組立) と 折り畳み器 (分子内組立) が生まれました
- フォルダマー形成は一時的であり,化学燃料によって制御可能であった.
- 化学燃料の調整により ブロックの区切りが制御されました
- 安定した共存は 均衡状態とは違って 均衡状態から外れた状態で達成された.
結論:
- 消散性非均衡化学を用いた合成システムにおける折り畳みと自己複製を結びつける.
- エネルギーが供給されると,単一の構成要素から,折りたたみ器と自己複製器の安定した共存を証明する.
- 複雑なシステムの形成における均衡の限界を克服する消散化学の役割を強調する.
関連する概念動画
Protein Folding
7.8K
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...
7.8K
The Replisome
33.0K
DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with...
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with...
33.0K
Molecular Chaperones and Protein Folding
17.7K
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...
17.7K
Noncovalent Attractions in Biomolecules
49.0K
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
49.0K
The DNA Replication Fork
35.5K
An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork. Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication...
35.5K
Restarting Stalled Replication Forks
5.8K
DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart,...
5.8K


