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Updated: Jul 27, 2026
12:19
Analysis of Cell Cycle Position in Mammalian Cells
Published on: January 21, 2012
c-Ablチロシンキナーゼの細胞周期調節によるDNAへの結合
1Department of Biology, University of California San Diego, La Jolla 92093-0116.
Science (New York, N.Y.)
|April 17, 1992
まとめ
プロトオンコゲンc-Ablタンパク質チロシンキナーゼは,そのカルボキシル末端ドメイン経由でDNAを結合する. このDNA結合はc-Abl機能に不可欠であり,リン酸化によりミトーシス中に失われます.
科学分野:
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
- 腫瘍生成 (オンコゲネシス) について
背景:
- プロトオンコゲンc-Ablは,細胞質と核の両方の局所化を持つタンパク質チロシンキナーゼをコードする.
- c-Ablは細胞のプロセスに役割を果たしますが,その正確な機能,特に核の役割については,さらなる解明が必要です.
- c-Ablの活性調節の理解は,がんの発症におけるその関与を理解するために重要である.
研究 の 目的:
- c-Ablタンパク質チロシンキナーゼのDNA結合能力を調べるために.
- c-Ablの染色体との関連におけるカルボキシル末端ドメインの役割を決定する.
- 細胞サイクル,特にミトーシス中のc-AblDNA結合活動の調節を探求する.
主な方法:
- バイオケミカルアッセイは,c-Ablタンパク質内のDNA結合ドメインを識別する.
- DNAとc-Ablの相互作用を確認するためのクロマチンの関連研究.
- cdc2キナーゼを用いたインビトロキナーゼアッセイで,DNA結合活性に対するリン酸化の影響を研究する.
- c-Abl DNA結合ドメインが欠けている変異性マウスの分析.
主要な成果:
- c-Ablのカルボキシル末端セグメントには,染色体結合に不可欠なDNA結合ドメインが含まれています.
- c-AblのDNA結合活動は,carboxyl-terminalセグメントをcdc2キナーゼによってリン酸化した後のミトーシス中に廃止される.
- c-Abl DNA結合ドメインを欠いたホモジゴス型変異性マウスは,出生時に致命的な発達障害を呈する.
結論:
- c-AblのDNA結合ドメインは,その生物学的機能に極めて重要です.
- ミトーシス中のリン酸化によるc-AblDNA結合の調節は,その活動を制御する重要なメカニズムです.
- c-AblのDNAとの相互作用は,正常な発達と生存に不可欠である.
関連する概念動画
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02:36DNA Damage can Stall the Cell Cycle
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02:34Inhibition of Cdk Activity
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02:36DNA Damage Can Stall the Cell Cycle
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02:34Inhibition of CDK Activity
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...