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関連する概念動画

Conjugated Proteins02:50

Conjugated Proteins

Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Protein-protein Interfaces02:04

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
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 Networks02:26

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Conjugated Proteins02:50

Conjugated Proteins

Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
Protein Denaturation01:28

Protein Denaturation

The function of proteins depends on their native three-dimensional structure, which is dictated by the amino acid sequence of the specific protein. Folding of the polypeptide chain takes place under specific conditions that energetically favor the folded conformation. In contrast, protein denaturation occurs spontaneously under unfavorable conditions that disrupt the integrity of the folded conformation. Thus, the chemical and physical environment of a protein, such as significant changes in pH...

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関連する実験動画

Updated: Jul 7, 2026

Genetic and Biochemical Approaches for In Vivo and In Vitro Assessment of Protein Oligomerization: The Ryanodine Receptor Case Study
12:43

Genetic and Biochemical Approaches for In Vivo and In Vitro Assessment of Protein Oligomerization: The Ryanodine Receptor Case Study

Published on: July 27, 2016

酸化窒素に依存するタンパク質対タンパク質相互作用のスクリーニング

Akio Matsumoto1, Karrie E Comatas, Limin Liu

  • 1Howard Hughes Medical Institute and Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.

Science (New York, N.Y.)
|August 2, 2003
PubMed
まとめ

酸化窒素 (NO) は,タンパク質とタンパク質の相互作用を媒介することによって,細胞の信号伝達を調節する. 研究者らは,プロカスパゼ-3,酸スフィンゴミエリナーゼ,およびNOシンタゼを含むNO依存相互作用を特定し,ニトロシル化が重要な規制メカニズムであることを示唆しました.

科学分野:

  • セルラー・シグナリング
  • 分子生物学は分子生物学である.
  • バイオケミストリー バイオケミストリー

背景:

  • 酸化窒素 (NO) は,細胞シグナル伝達において多様な役割を担う分子です.
  • タンパク質とタンパク質の相互作用は,細胞機能とシグナル伝達経路にとって極めて重要です.
  • NOがこれらの相互作用にどのように影響するかを理解することは,細胞の調節を解読する鍵です.

研究 の 目的:

  • タンパク質とタンパク質の相互作用を調節する窒素酸化物 (NO) の役割を調査する.
  • 改良された酵母2ハイブリッドシステムを用いて,プロカスペーゼ-3の新規のNO依存型結合パートナーを特定する.

主な方法:

  • NO依存の相互作用を検出するために酵母2ハイブリッドシステムの変更.
  • プロカスペーゼ-3の結合パートナーのスクリーニング
  • 哺乳類の細胞における識別された相互作用の検証.

主要な成果:

  • NOに依存する複数のタンパク質-タンパク質相互作用が特定されました.
  • プロカスペーゼ-3,酸性スフィンゴミエリナーゼ,およびNOシンタゼの間の特定のNO依存相互作用は,哺乳類の細胞で確認されました.
  • 証拠は,ニトロシル化がタンパク質の相互作用を調節するメカニズムであることを示唆しています.

さらに関連する動画

Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry
10:24

Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry

Published on: June 7, 2018

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
08:31

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition

Published on: October 3, 2018

関連する実験動画

Last Updated: Jul 7, 2026

Genetic and Biochemical Approaches for In Vivo and In Vitro Assessment of Protein Oligomerization: The Ryanodine Receptor Case Study
12:43

Genetic and Biochemical Approaches for In Vivo and In Vitro Assessment of Protein Oligomerization: The Ryanodine Receptor Case Study

Published on: July 27, 2016

Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry
10:24

Defining Hsp33's Redox-regulated Chaperone Activity and Mapping Conformational Changes on Hsp33 Using Hydrogen-deuterium Exchange Mass Spectrometry

Published on: June 7, 2018

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
08:31

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition

Published on: October 3, 2018

結論:

  • 酸化窒素 (NO) は,タンパク質とタンパク質の相互作用を調節する上で重要な役割を果たします.
  • ニトロシル化は,タンパク質複合体の形成を調節する潜在的広範なメカニズムとして浮上しています.
  • 制御された再酸化条件下でのさらなるタンパク質学的研究は,追加のNO媒介相互作用を明らかにするために正当化されています.