関連する実験動画
Updated: Jun 6, 2026

10:59
Visualizing and Quantifying Endonuclease-Based Site-Specific DNA Damage
Published on: August 21, 2021
DNAの損傷に対する反応として,遺伝ネットワークの再配線が行われます
Sourav Bandyopadhyay1, Monika Mehta, Dwight Kuo
1Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA.
まとめ
研究者は,DNA損傷に反応する酵母細胞のダイナミックな遺伝子相互作用をマッピングしました. この微分エピスタシスのマッピングは,以前未知の遺伝子機能とDNA修復経路を明らかにしました.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 細胞生物学 細胞生物学
背景:
- セルラーネットワークは通常,静的な地図として研究され,ダイナミックな変化を捉えることができない.
- ダイナミックな遺伝子相互作用を理解することは,DNA損傷のような刺激に対する細胞の反応を理解するために不可欠です.
研究 の 目的:
- ダイナミックな遺伝子の相互作用を明らかにするために,新しい方法である微分エピスタシスマッピングを開発し,適用する.
- 静的分析で見逃されたDNA損傷に対する細胞応答に関与する遺伝子機能と経路を特定する.
主な方法:
- 酵母キナーゼ,フォスファタゼ,および転写因子の間の遺伝的相互作用を分析するために,微分エピスタシスマッピングを使用しました.
- DNA損傷の条件下で遺伝子相互作用の変化を調査した.
主要な成果:
- DNA損傷を経験する酵母細胞内の遺伝子相互作用における広範なダイナミックな変化を発見した.
- Slt2キナーゼ,Pph3フォスファタゼ,Htz1ヒストン変異を含む特定の遺伝子の新しいDNA修復経路と損傷依存の役割が特定されました.
- 安定したタンパク質複合体を観察したが,細胞の混乱の間にそれらの間の機能的関係を再編成した.
結論:
- 微分エピスタシスマッピングは,ダイナミックな細胞プロセスと遺伝子機能を明らかにするための強力なアプローチを提供します.
- この方法は,刺激に対する細胞の反応を理解し,複雑な遺伝的景観をマッピングするために貴重なものです.
- この研究は,遺伝ネットワークのダイナミックな性質と,DNA修復と細胞の調節におけるその重要性を強調しています.
関連する概念動画
Overview of DNA Repair
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
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Overview of DNA Repair
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
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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...
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...
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Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
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