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Circadian Rhythms and Gene Regulation02:19

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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
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Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
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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.
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Many receptor binding ligands are hydrophilic; they do not cross the cell membrane but bind to cell-surface receptors. Thus, their message must be relayed by second messengers present in the cell cytoplasm. There are several second messenger pathways, each with its own way of relaying information. For example, the G protein-coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol pathway is active when the receptor induces...
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Updated: Jul 10, 2025

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ペプチド ベースの オシレータ

Dharm Dev1, Nathaniel Wagner1, Bapan Pramanik1

  • 1Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.

Journal of the American Chemical Society
|November 20, 2023
PubMed
まとめ
この要約は機械生成です。

研究者はペプチドベースの振動器を開発し 生命のリズムを模倣しました この合成システムは,連続的に振動するタンクリアクター (CSTR) でコイル・コイル複製を用いて,持続的な振動を示し,生命の初期とバイオナノテクノロジーの洞察を提供します.

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関連する実験動画

Last Updated: Jul 10, 2025

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06:31

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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
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科学分野:

  • 生物化学
  • 化学運動学
  • 合成生物学

背景:

  • 生命は波動的でリズミカルな行動を示します
  • 合成オシレータが開発され,バッチまたは継続的なオシレーションを表示しています.
  • ペプチドは初期の化学的進化と 現代的なバイオナノテクノロジーにおいて 重要な役割を果たしています

研究 の 目的:

  • 新しいペプチドベースの振動器を明らかにし,特徴づけること.
  • ペプチドベースの振動における超分子組立と基板相互作用の役割を調査する.
  • 継続的に振動するタンクリアクター (CSTR) の持続的な振動と環境条件への依存を調査する.

主な方法:

  • 巻き巻きベースのペプチド複製をイニシアーションと阻害経路と結合する.
  • 継続的に振動するタンクリアクター (CSTR) を利用し,持続的な振動力学を行います.
  • 初期複製抑制のダイナミクスを研究するためにバッチモード反応を使用します.
  • 異なるフロー,pH,および酸化還元条件下で実験的および理論的な特徴づけを行う.

主要な成果:

  • ペプチドベースの振動器が成功裏に設計され,実装されました.
  • 超分子組立と特定の基板の相互作用は,振動にとって重要なものとして特定されました.
  • バッチ反応は単一の減圧サイクルを生み出し,CSTR実験は持続的な振動を示した.
  • CSTRの様々な流れと環境条件下で振動が持続した.

結論:

  • ペプチドベースのシステムは 持続的な振動を示し 生物学的リズムを模倣します
  • この研究は,ペプチドを用いた堅牢な振動ネットワークの設計の可能性を強調しています.
  • 単純なペプチドから複雑な酵素と セルラー行動への進化の経路を示唆しています