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Replication in Eukaryotes01:29

Replication in Eukaryotes

In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
Replication in Eukaryotes02:31

Replication in Eukaryotes

Overview
Replication in Eukaryotes01:29

Replication in Eukaryotes

In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
Replication in Eukaryotes02:31

Replication in Eukaryotes

Overview
Genome Copying Errors02:46

Genome Copying Errors

DNA replication is a well-evolved process that copies millions of base pairs with high fidelity during each cell division. Occasionally a wrong base or a long stretch of wrong bases may get added to the daughter strands. If the errors are left unchecked, cells might accumulate several mutations that might endanger their  survival. Therefore, the copying errors are checked and repaired at three levels.
The DNA Replication Fork01:02

The DNA Replication Fork

An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork.   Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication forks, one in...

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Updated: May 30, 2026

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique
07:18

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique

Published on: October 27, 2011

結合遺伝子は,複製の過程でチェックされます.

Jiri Lukas1, Jiri Bartek

  • 1Centre for Genotoxic Stress Research, Danish Cancer Society, Strandboulevarden 49, DK-2100 Copenhagen, Denmark. jil@cancer.dk

Cell
|July 26, 2011
PubMed
まとめ
この要約は機械生成です。

複製ストレスのチェックポイントは,ゲノムの完全性を維持します. ベルメジョ et al. ほか (2011) は,チェックポイント機能と,核毛孔近くの遺伝子におけるトポロジカルな緊張を和らげるとの関連性を明らかにした.

さらに関連する動画

Chromosome Replicating Timing Combined with Fluorescent In situ Hybridization
17:14

Chromosome Replicating Timing Combined with Fluorescent In situ Hybridization

Published on: December 10, 2012

関連する実験動画

Last Updated: May 30, 2026

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique
07:18

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique

Published on: October 27, 2011

Chromosome Replicating Timing Combined with Fluorescent In situ Hybridization
17:14

Chromosome Replicating Timing Combined with Fluorescent In situ Hybridization

Published on: December 10, 2012

科学分野:

  • 細胞生物学 細胞生物学
  • ゲノミクスゲノミクスとは
  • 分子生物学は分子生物学である.

背景:

  • 複製ストレスは,チェックポイントの活性化に不可欠です.
  • 複製するゲノムの完全性を維持することは不可欠です.
  • 正確なメカニズムは完全に理解されていません.

研究 の 目的:

  • トポロジカルテンションの解消とチェックポイントの活性化を結びつける新しいメカニズムを特定する.
  • 細胞がストレス下での複製ゲノムの完全性を維持する方法を解明する.

主な方法:

  • ベルメホ氏らによる研究. (2011) は,DNA複製,チェックポイント制御,およびゲノム安定性との関係を調査した.
  • トポロジカルな緊張緩和の役割を理解するために,特定の分子経路が分析されました.

主要な成果:

  • チェックポイントの機能とトポロジカル・テンションの緩和の間の直接的なリンクが特定されました.
  • このメカニズムは,核毛孔結合遺伝子で作用し,ゲノム維持に空間的な要素があることを示唆しています.

結論:

  • この発見は,複製ストレス中にゲノム整合性を維持するための新しい経路を明らかにしています.
  • このメカニズムは,ゲノム不安定を防ぐために,トポロジカル・テンション・マネジメントの重要性を強調しています.