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Updated: May 18, 2026

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Identification of protein complexes with quantitative proteomics in S. cerevisiae
Published on: March 4, 2009
酵母菌Saccharomyces cerevisiaeのタンパク質複合体のグローバルランドスケープ
Nevan J Krogan1, Gerard Cagney, Haiyuan Yu
1Banting and Best Department of Medical Research, Terrence Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, 160 College St, Toronto, Ontario M5S 3E1, Canada.
Nature
|March 24, 2006
まとめ
研究者は,質量スペクトロメトリと機械学習を使用して,酵母におけるタンパク質とタンパク質の相互作用をマッピングしました. この研究は,何千もの相互作用を特定し,細胞プロセスに不可欠な何百ものタンパク質複合体を明らかにしました.
科学分野:
- 分子生物学は分子生物学である.
- プロテオミクス プロテオミクスは,プロテオミクスの
- システム生物学 システム生物学
背景:
- タンパク質とタンパク質の相互作用は,細胞のプロセスにとって根本的なものです.
- これらの相互作用を理解することは,タンパク質の機能と生物学的メカニズムを解読するための鍵です.
- 多くの細胞機能は,安定したタンパク質複合体によって実行されます.
研究 の 目的:
- 酵母菌Saccharomyces cerevisiaeにおけるタンパク質対タンパク質の相互作用を体系的に特定し,マッピングする.
- タンパク質複合体とそのサブユニット構成に関する包括的なデータセットを構築する.
- 機能的ゲノミクスとシステム生物学の研究のための貴重なリソースを提供すること.
主な方法:
- タグ付けされたタンパク質を酵母から分離するために,タンデム・アフィニティ・ピューリフィケーションを使用しました.
- タンパク質の識別のために,マトリックスアシストレーザー脱吸収/イオン化飛行時間 (MALDI-TOF) と液体染色学タンデム質量スペクトロメトリ (LC-MS/MS) を採用した.
- マススペクトロメトリーデータを統合し,相互作用確率を割り当てるために機械学習アルゴリズムを適用しました.
主要な成果:
- 4,562個のタグされたタンパク質を成功裏に浄化し分析しました.
- 2,708種類のタンパク質を含む7,123種類の高信頼性タンパク質相互作用が特定されました.
- 547のタンパク質複合体と,複合体間の429の相互作用を発見し,多くの複合体は以前は分類されていなかった.
結論:
- この研究は,酵母タンパク質とタンパク質の相互作用とタンパク質複合体の大規模な地図を提供します.
- この包括的なデータセットは,細胞機能を理解し,システム生物学を進めるための貴重なリソースです.
- この発見は,個々のタンパク質と複雑な生物学的経路に関する将来の研究を促進します.
関連する概念動画
Protein Complex Assembly
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...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Protein Complexes with Interchangeable Parts
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 to...
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 to...
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,...
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,...
Protein Complex Assembly
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...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Protein Complexes with Interchangeable Parts
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 to...
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 to...
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,...
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,...

