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Updated: Jun 23, 2026

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Identification of Kinase-substrate Pairs Using High Throughput Screening
Published on: August 29, 2015
古典的なヒトタンパク質チロシン・フォスファトームの大規模構造分析
Alastair J Barr1, Emilie Ugochukwu, Wen Hwa Lee
1University of Oxford, Structural Genomics Consortium, Old Road Campus Research Building, Roosevelt Drive, Headington, Oxford, OX3 7DQ, UK. alastair.barr@sgc.ox.ac.uk
Cell
|January 27, 2009
まとめ
この研究は,タンパク質チロシンフォスファタゼ (PTP) 家族内の多様な構造と機能を明らかにしています. 触媒的に無効なPTPを特定し,PTPの調節と基板結合のための新しいモデルを提案しています.
科学分野:
- バイオケミストリー バイオケミストリー
- 構造生物学 構造生物学とは
- 分子生物学は分子生物学である.
背景:
- タンパク質チロシンファスファターゼ (PTPs) は,デフォスフォリレーションを通じて細胞プロセスを調節する重要な酵素です.
- PTPの多様性を理解することは,複雑な細胞信号伝達経路を解読する鍵です.
研究 の 目的:
- 構造的・機能的データを用いて,古典的なヒトPTPファミリーを包括的に分析する.
- PTPの多様性,触媒活性,基板認識,および規制メカニズムを調査する.
主な方法:
- 22の新規および既存のヒトPTP結晶構造の分析.
- 構造的な比較により,保存され,多様な特徴を特定する.
- 触媒活性を決定する酵素測定法.
- PTPの二分化と調節のモデリング.
主要な成果:
- 人間のPTPは,保存された折りたたみにもかかわらず,多様な表面特性を示す.
- 二次基板結合ポケットが頻繁に観察され,基板認識と阻害剤設計に影響を与えます.
- 4つの異なる触媒ループ (WPD) の形状が特定され,ループの閉塞メカニズムを示唆した.
- PTPD1,PTPD2およびHDPTPは,触媒的に無効であることが確認されました.
- RPTPgamma/zetaのための新しい"頭から足まで"の二分化モデルが提案され",阻害性"モデルとは異なる.
結論:
- PTPファミリーは,構造,活動,および規制において,家族内での有意な多様性を示しています.
- 構造的な洞察は,基板結合の理解と選択的阻害剤の開発を容易にする.
- PTP自己調節のための新しいモデルは,抑制メカニズムのための分子基盤を提供します.
関連する概念動画
Phosphorylation
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
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 Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...

