関連する実験動画
Updated: Jun 20, 2026

10:24
Two- and Three-Dimensional Live Cell Imaging of DNA Damage Response Proteins
Published on: September 28, 2012
DNA-PKcs-PIDDゾーム:G2/Mチェックポイントのメンテナンスに役割を果たす核カスパース-2活性化複合体
Mingan Shi1, Carolyn J Vivian, Kyung-Jong Lee
1Stowers Institute for Medical Research, Kansas City, MO 64110, USA.
Cell
|February 11, 2009
まとめ
核カスパース-2 (CASP2) の活性化は,DNA損傷によって調節されます. 新しいDNA-PKcs-PIDDosome複合体が形成され,DNA損傷のチェックポイントと修復を維持するためにCASP2をリン酸化および活性化します.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- Caspase-2 (CASP2) は細胞核に特異的に局所されているが,その機能は不明である.
- DNA損傷反応経路は,ゲノムの安定性を維持するために重要です.
研究 の 目的:
- 核カスパース-2局所化の機能的意義を調査する.
- DNA損傷への反応としてカスパース-2活性化のメカニズムを解明する.
主な方法:
- ガンマ放射線はDNAの損傷を誘導する.
- タンパク質のリン酸化と複合体の形成を検出するためのウェスタン・ブロッティングと免疫降水.
- DNA損傷のチェックポイントと修復を評価するための細胞アッセイ.
主要な成果:
- DNA損傷は,DNA-PKcs.によってS122の核カスパース-2のリン酸化を誘発する.
- カスパーゼ-2,PIDD,DNA-PKcsを含む核DNA-PKcs-PIDD複合体の形成.
- カスパース-2の活性化は,G2/MのDNA損傷チェックポイントの維持とNHEJのDNA修復に不可欠です.
結論:
- DNA-PKcs-PIDDosomeは,DNA損傷に反応してカスパース-2を活性化する新しい核複合体です.
- 核カスパース-2は,チェックポイント制御と修復を含むDNA損傷反応経路において重要な役割を果たします.
関連する概念動画
DNA Damage can Stall the Cell Cycle
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
Restarting Stalled Replication Forks
DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart, a...
Inhibition 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...
S-Cdk Initiates DNA Replication
The cell cycle is a series of events leading to DNA duplication followed by the division of cell content to form two daughter cells. The cell cycle progresses in four stages—the cell increases in size (gap 1 or G1-phase), duplicates its DNA (synthesis or S-phase), prepares to divide (gap 2 or G2-phase), and divides (mitosis or M-phase).
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.
DNA Damage Can Stall the Cell Cycle
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
S-Cdk Initiates DNA Replication
The cell cycle is a series of events leading to DNA duplication followed by the division of cell content to form two daughter cells. The cell cycle progresses in four stages—the cell increases in size (gap 1 or G1-phase), duplicates its DNA (synthesis or S-phase), prepares to divide (gap 2 or G2-phase), and divides (mitosis or M-phase).
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.

