タンパク質相関プロファイリングによるヒトセンターソームのプロテオミック特徴付け
Jens S Andersen1, Christopher J Wilkinson, Thibault Mayor
1Center for Experimental BioInformatics, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
Nature
|December 5, 2003
まとめ
研究者らは,質量スペクトロメトリを用いて,ヒトセンターソームの新種のタンパク質を特定した. この研究は,細胞生物学におけるセンターソームの組成と機能の理解を前進させる.
科学分野:
- 細胞生物学 細胞生物学
- プロテオミクス プロテオミクスは,プロテオミクスの
背景:
- センターソームは,動物細胞のマイクロチューブル組織の中心である.
- 細胞の形状,極性,運動性に影響し,ミトスのスパインドルを形成することによって細胞分裂に不可欠です.
- その重要性にもかかわらず,センターソームの構造と組成はほとんど不明のままです.
研究 の 目的:
- 人間のセンターソームの新しいタンパク質成分を特定する.
- インターフェーズ中のセンターソーム内のタンパク質を定量的にプロファイルする.
- センターソームの構造と機能の理解を深めること.
主な方法:
- マススペクトロメトリーに基づくヒトセンターソームのプロテオミック分析.
- 遠心分離分子の間でタンパク質の定量プロファイリング.
- 特定されたタンパク質の,既知のセンターソーマタンパク質との相関性,およびin vivo局所化による検証.
主要な成果:
- 23種類の新しいセンターソーマルタンパク質を特定し,検証しました.
- さらに41の候補タンパク質が特定されました.
- 既知のセンターソーマルタンパク質の圧倒的多数と,非特異性タンパク質の大きな背景を特徴づけた.
結論:
- タンパク質相関プロファイリングは,大規模な多タンパク質複合体を分析するのに有効です.
- この研究は,ヒトセンターソームの既知の構成を大幅に拡張しています.
- センターソームの機能と調節に関するさらなる研究のための基盤を提供します.
関連する概念動画
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,...
Histone Variants at the Centromere
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3 variants are also...
Centrosome Duplication
The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
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...
Centrosome Duplication
The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
Centrioles and Centrosomes
Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or "prometaphase,"...
Near the end of the prophase, also called late prophase or "prometaphase,"...


