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Protein Complex Assembly02:41

Protein Complex Assembly

16.8K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
16.8K
Protein Complex Assembly02:41

Protein Complex Assembly

2.6K
2.6K
Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

1.8K
Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
1.8K
Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

6.6K
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
6.6K
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

2.9K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.9K
Reaction Yield02:22

Reaction Yield

59.9K
The theoretical yield of a reaction is the amount of product estimated to form based on the stoichiometry of the balanced chemical equation. The theoretical yield assumes the complete conversion of the limiting reactant into the desired product. The amount of product that is obtained by performing the reaction is called the actual yield, and it may be less than or (very rarely) equal to the theoretical yield.
59.9K

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関連する実験動画

Updated: Feb 2, 2026

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
09:35

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling

Published on: April 1, 2017

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原生膜から直接放出されるタンパク質組は,質量スペクトロメトリ用の複合体を生成する.

Dror S Chorev1, Lindsay A Baker2, Di Wu1

  • 1Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK.

Science (New York, N.Y.)
|November 17, 2018
PubMed
まとめ

研究者たちは 化学的破壊なしに 完ぺきな膜タンパク質を 研究する新しい方法を開発しました この技術により 細胞の相互作用や機能が保たれ 細胞のプロセスに より深い洞察が得られます

さらに関連する動画

Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies
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Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies

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Analyzing Large Protein Complexes by Structural Mass Spectrometry
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Analyzing Large Protein Complexes by Structural Mass Spectrometry

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関連する実験動画

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Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
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Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling

Published on: April 1, 2017

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Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies
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Analyzing Large Protein Complexes by Structural Mass Spectrometry
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Analyzing Large Protein Complexes by Structural Mass Spectrometry

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科学分野:

  • 生物化学
  • 分子生物学
  • 細胞生物学

背景:

  • 膜タンパク質は細胞機能に不可欠ですが,脂質二層環境のため研究することは困難です.
  • 伝統的な抽出方法では タンパク質複合体とその本来の相互作用を 破壊することがよくあります
  • 細胞メカニズムを解明する鍵となるのは 膜タンパク質の整合性を理解することです

研究 の 目的:

  • 無傷の膜タンパク質を分離するための非破壊的方法を開発する.
  • 質量スペクトロメトリーを用いて原生膜タンパク質複合体の構成と相互作用を特徴付ける.
  • タンパク質の機能と安定性に対する原生膜環境の重要性を調査する.

主な方法:

  • 脂質二層から無傷の膜タンパク質を化学溶解なしに排出する新技術を開発した.
  • 質量スペクトロメトリーを使って 放出された組成物を分析した.
  • 細菌 (Escherichia coli) と真核生物 (Bos taurus) の膜にこの方法を適用した.

主要な成果:

  • E. coli のベータ・バレル・アセンブリ・メカニズム内の 健全なチャペロン・ポリン・コンプレックスと 脂質の相互作用を成功裏に特定した.
  • 細菌の内外膜に広がる流出ポンプを観察した.
  • E. coliの内膜におけるATP合成と関連したペンタメリクTonB孔とSecYEGチャネルを特徴づけました.
  • ボス・タウルスミトコンドリアから脂肪酸に結合した分離された呼吸器複合体とADP/ATPトランスロカゼジマー.

結論:

  • 非破壊的分離法では,原生タンパク質とタンパク質と脂質の相互作用が保存されます.
  • 本来の膜環境は,小分子結合,サブユニット結合,およびチャペロン相互作用の維持に不可欠である.
  • このアプローチは,ネイティブの膜タンパク質とその機能的複合体を研究するための強力なツールを提供します.