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関連する概念動画

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...
Protein and Protein Structure02:15

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...
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...
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...
Diversity in Cell Signaling Responses01:22

Diversity in Cell Signaling Responses

The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity. 
Graded and Abrupt Responses
Some signaling systems generate...

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関連する実験動画

Updated: Jun 2, 2026

Single-Molecule Measurement of Protein Interaction Dynamics Within Biomolecular Condensates
06:48

Single-Molecule Measurement of Protein Interaction Dynamics Within Biomolecular Condensates

Published on: January 5, 2024

シングレット酸素の反応は,タンパク質のダイナミクスに反応する.

Rasmus Lybech Jensen1, Jacob Arnbjerg, Henrik Birkedal

  • 1Center for Oxygen Microscopy and Imaging, Chemistry Department, Aarhus University, DK-8000, Århus, Denmark.

Journal of the American Chemical Society
|April 16, 2011
PubMed
まとめ

タンパク質によるシングレット酸素除去は,タンパク質構造によって影響を受けます. デナチュレーションやリガンド結合などのタンパク質構造の変化は,シングレット酸素消火の速度を変え,細胞プロセスに影響を与えます.

科学分野:

  • バイオケミストリー バイオケミストリー
  • 化学生物学 化学生物学とは
  • 細胞生物学 細胞生物学

背景:

  • シングレット分子酸素 (O2 (a)) は,細胞死を含む生物学的プロセスに関与しています.
  • シングレット酸素とタンパク質の間の反応は,タンパク質の振る舞いを変化させることができます.
  • シングレット酸素の行動に対するタンパク質構造の影響はあまり研究されていない.

研究 の 目的:

  • タンパク質の構造の変化がシングレット酸素除去の速度にどのように影響するかを調査する.
  • シングレット酸素運動を用いてタンパク質の動態をモニタリングする可能性を調査する.

主な方法:

  • 様々なタンパク質によるシングレット酸素除去の速度定数を研究した.
  • デナチュレーション,マクロ分子混雑,リガンド結合,およびポリメリゼーションによるタンパク質構造の操作.

主要な成果:

  • タンパク質の非自然化,混雑,リガンド結合,およびポリメリゼーションは,シングレット酸素除去の速度定数を大幅に変化させます.
  • アミノ酸残留を露出または隠すタンパク質構造の変化は,単一酸素消火率に測定可能な影響を与える.

結論:

さらに関連する動画

Utilizing Time-Resolved Protein-Induced Fluorescence Enhancement to Identify Stable Local Conformations One α-Synuclein Monomer at a Time
07:56

Utilizing Time-Resolved Protein-Induced Fluorescence Enhancement to Identify Stable Local Conformations One α-Synuclein Monomer at a Time

Published on: May 30, 2021

Using Three-color Single-molecule FRET to Study the Correlation of Protein Interactions
11:22

Using Three-color Single-molecule FRET to Study the Correlation of Protein Interactions

Published on: January 30, 2018

関連する実験動画

Last Updated: Jun 2, 2026

Single-Molecule Measurement of Protein Interaction Dynamics Within Biomolecular Condensates
06:48

Single-Molecule Measurement of Protein Interaction Dynamics Within Biomolecular Condensates

Published on: January 5, 2024

Utilizing Time-Resolved Protein-Induced Fluorescence Enhancement to Identify Stable Local Conformations One α-Synuclein Monomer at a Time
07:56

Utilizing Time-Resolved Protein-Induced Fluorescence Enhancement to Identify Stable Local Conformations One α-Synuclein Monomer at a Time

Published on: May 30, 2021

Using Three-color Single-molecule FRET to Study the Correlation of Protein Interactions
11:22

Using Three-color Single-molecule FRET to Study the Correlation of Protein Interactions

Published on: January 30, 2018

  • タンパク質の構造的ダイナミクスは,シングレット酸素反応性を調節する上で重要な役割を果たします.
  • これらの相互作用を理解することは,シングレット酸素媒介細胞イベントとその細胞機能への影響を理解するために不可欠です.