関連する実験動画
Updated: Jul 21, 2026

16:41
A Protocol for Computer-Based Protein Structure and Function Prediction
Published on: November 3, 2011
タンパク質機能のゲノム全体の予測のための結合アルゴリズム
E M Marcotte1, M Pellegrini, M J Thompson
1Molecular Biology Institute, UCLA-DOE Laboratory of Structural Biology and Molecular Medicine, University of California, Los Angeles 90095, USA.
Nature
|November 26, 1999
まとめ
研究者は,相関する進化,遺伝子発現,ドメイン融合を分析することによって,酵母タンパク質の機能をマッピングしました. これは93,000以上の機能的リンクを特定し,これまで特徴づけられなかった酵母タンパク質の半分以上に機能を割り当てました.
科学分野:
- プロテオミクスはプロテオミクスを用います.
- バイオインフォマティックス
- システム生物学 システム生物学
背景:
- ゲノミクスの進歩は,タンパク質の機能と相互作用の発見に対する新しいアプローチを可能にします.
- タンパク質ネットワークの理解は,細胞メカニズムを解読する上で極めて重要です.
研究 の 目的:
- Saccharomyces cerevisiaeのタンパク質間の機能的関係を特定する.
- 以前は特徴づけられていなかった酵母タンパク質に機能を割り当てること.
主な方法:
- タンパク質は,相関する進化に基づいてグループ化されました.
- メッセンジャーRNA発現パターンの相関性を分析した.
- タンパク質領域融合のパターンを調べました.
- これらの統合データから,機能的なリンクが推論されました.
主要な成果:
- 機能的に関連した酵母タンパク質の間のペアウェイズリンクが93,000以上発見されました.
- 機能的な役割は,これまで特徴づけられていない酵母タンパク質の50%以上 (2557種類のタンパク質) に割り当てられました.
- 具体的な例としては,新しいタンパク質ファミリー,がん関連のタンパク質ホモログ,酵母プリオンSup35.5が挙げられます.
結論:
- 進化的,発現的,構造的データの統合分析により,タンパク質の機能的ネットワークが効果的に明らかになる.
- このアプローチは,特に特徴づけられていないタンパク質のプロテオームの注釈を大幅に強化します.
- 特定されたリンクは,さらなる実験的検証と生物学的発見のための基盤を提供します.
関連する概念動画
Protein Families
Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism. Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members. If these new proteins contain similar amino acids in key locations, protein...
Conservation of Protein Domains Over Different Proteins
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
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...
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,...
Genome Annotation and Assembly
The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
Proteomics
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...

