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相关概念视频

Translesion DNA Polymerases02:10

Translesion DNA Polymerases

11.0K
Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
TLS polymerases are found in all three domains of life - archaea, bacteria, and eukaryotes. Of the different classes of TLS polymerases, members of the Y family are fitted with specialized structures that...
11.0K
DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

10.0K
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...
10.0K
DNA Damage Can Stall the Cell Cycle02:36

DNA Damage Can Stall the Cell Cycle

3.0K
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...
3.0K
Telomeres and Telomerase02:41

Telomeres and Telomerase

26.9K
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded...
26.9K
Telomeres and Telomerase02:41

Telomeres and Telomerase

7.0K
7.0K
Replication in Eukaryotes01:29

Replication in Eukaryotes

17.1K
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...
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Rad51 filaments assembled in the absence of the complex formed by the Rad51 paralogs Rad55 and Rad57 are outcompeted by translesion DNA polymerases on UV-induced ssDNA gaps.

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相关实验视频

Updated: Jan 18, 2026

Detection of Post-Replicative Gaps Accumulation and Repair in Human Cells Using the DNA Fiber Assay
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Detection of Post-Replicative Gaps Accumulation and Repair in Human Cells Using the DNA Fiber Assay

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在DNA损伤耐受性因子Rad5和端粒复制.

Stefano Mattarocci1

  • 1Université Paris-Saclay, Université Paris-Cité, CEA, Institut de biologie François Jacob, UMR Stabilité Génétique Cellules Souches et Radiations, Fontenay-aux-Roses, Inserm, France. stefano.mattarocci@inserm.fr.

Current genetics
|May 26, 2025
PubMed
概括

DNA损伤耐受性 (DDT) 途径使用Rad5来帮助复制过去的DNA块. Rad5与端粒结合,这表明它在端粒复制和DNA修复中的作用.

科学领域:

  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.
  • 细胞生物学 细胞生物学

背景情况:

  • DNA复制需要克服阻碍的机制,例如DNA损伤耐受性 (DDT) 途径.
  • PCNA无处不在是DDT的核心,它调解无错误或容易发生错误的DNA损伤绕道.
  • Rad5是酵母Saccharomyces cerevisiae的一个关键因素,影响DDT通路和与端粒相互作用.

研究的目的:

  • 审查目前对Rad5和端粒之间的联系的理解.
  • 提供Rad5与酵母端粒结合的证据.
  • 探索端粒复制和DNA损伤耐受性之间的功能相互作用.

主要方法:

  • 在DNA损伤耐受性Rad5功能的文献综述.
  • 实验证据表明Rad5与Saccharomyces cerevisiae中的端粒结合.
  • 在端粒复制过程中对Rad5丰富的分析.

主要成果:

  • Rad5在DDT中扮演着双重的角色,通过PCNA多基化促进无错绕道,并与聚合酶相互作用,用于易发生错误的绕道.
  • Rad5 显示与酵母端粒结合.
  • Rad5 显示了端粒的丰富,特别是在它们的复制过程中.
关键词:
这就是ALT ALT.细胞命运 细胞命运通过DNA修复途径进行修复.复制DNA复制DNA复制DNA复制Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5 Rad5泰洛米尔 (Telomere) 是一种电离体.

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相关实验视频

Last Updated: Jan 18, 2026

Detection of Post-Replicative Gaps Accumulation and Repair in Human Cells Using the DNA Fiber Assay
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Detection of Post-Replicative Gaps Accumulation and Repair in Human Cells Using the DNA Fiber Assay

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Visualizing and Quantifying Endonuclease-Based Site-Specific DNA Damage
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Visualizing and Quantifying Endonuclease-Based Site-Specific DNA Damage

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结论:

  • Rad5在功能上与酵母中的端粒有关.
  • 这些发现表明,端粒复制和DNA损伤耐受机制之间存在新的联系.
  • 需要进一步的研究来阐明Rad5在复制过程中的端粒中的确切作用.