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相关概念视频

Homologous Recombination02:31

Homologous Recombination

50.5K
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
50.5K
Fixing Double-strand Breaks02:04

Fixing Double-strand Breaks

12.6K
The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
12.6K
Restarting Stalled Replication Forks02:37

Restarting Stalled Replication Forks

5.8K
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,...
5.8K
Base Excision Repair01:54

Base Excision Repair

22.3K
One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
22.3K
Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

14.1K
For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
14.1K
Base-pairing and DNA Repair02:27

Base-pairing and DNA Repair

64.7K
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相关实验视频

Updated: Jun 25, 2025

Identifying the Effects of BRCA1 Mutations on Homologous Recombination using Cells that Express Endogenous Wild-type BRCA1
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Identifying the Effects of BRCA1 Mutations on Homologous Recombination using Cells that Express Endogenous Wild-type BRCA1

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(单链DNA) 在理解BRC的存在方面的差距.

Anne Schreuder1, Tiemen J Wendel1, Carlo G V Dorresteijn2

  • 1Leiden University Medical Center, Department of Human Genetics, Leiden, The Netherlands; Oncode Institute, Utrecht, The Netherlands.

Trends in genetics : TIG
|May 24, 2024
PubMed
概括
此摘要是机器生成的。

BRCA1和BRCA2蛋白通过同源重组,复制保护和单链 (ss) DNA间隙抑制来抑制瘤. 这些功能是相互连接的,而不是分开的,影响基因组不稳定性和癌症治疗.

关键词:
这就是BRCA1的原因.这就是BRCA2的原因.DNA双链断裂修复的修复方法同类的重组组合.复制压力是复制的压力.单链DNA的缺口是单链DNA的缺口.

更多相关视频

gDNA Enrichment by a Transposase-based Technology for NGS Analysis of the Whole Sequence of BRCA1, BRCA2, and 9 Genes Involved in DNA Damage Repair
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gDNA Enrichment by a Transposase-based Technology for NGS Analysis of the Whole Sequence of BRCA1, BRCA2, and 9 Genes Involved in DNA Damage Repair

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Characterizing DNA Repair Processes at Transient and Long-lasting Double-strand DNA Breaks by Immunofluorescence Microscopy
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相关实验视频

Last Updated: Jun 25, 2025

Identifying the Effects of BRCA1 Mutations on Homologous Recombination using Cells that Express Endogenous Wild-type BRCA1
08:53

Identifying the Effects of BRCA1 Mutations on Homologous Recombination using Cells that Express Endogenous Wild-type BRCA1

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gDNA Enrichment by a Transposase-based Technology for NGS Analysis of the Whole Sequence of BRCA1, BRCA2, and 9 Genes Involved in DNA Damage Repair
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gDNA Enrichment by a Transposase-based Technology for NGS Analysis of the Whole Sequence of BRCA1, BRCA2, and 9 Genes Involved in DNA Damage Repair

Published on: October 6, 2014

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Characterizing DNA Repair Processes at Transient and Long-lasting Double-strand DNA Breaks by Immunofluorescence Microscopy
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科学领域:

  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.
  • 癌症研究 癌症研究

背景情况:

  • BRCA1和BRCA2蛋白质是关键的瘤抑制剂.
  • 它们的作用传统上分为同源重组,复制叉保护和ssDNA缺口抑制.
  • 讨论了这些功能的相对重要性和相互作用.

研究的目的:

  • 审查ssDNA缺口的起源和解决方案.
  • 讨论了解BRCA1/2在ssDNA缺口抑制中的作用的最新进展.
  • 为了评估BRCA1/2的瘤抑制功能的相互联系.

主要方法:

  • 对BRCA1/2功能现有研究的文献综述.
  • 分析数据,将ssDNA差距积累与基因组不稳定性和化学敏感性联系起来.
  • 讨论剖析单个BRCA1/2功能所面临的挑战.

主要成果:

  • 在BRCA1/2缺乏细胞中的ssDNA间隙积累与基因组不稳定性和化学敏感性相关.
  • 差距抑制及其与其他BRCA1/2功能分离的确切因果作用尚不清楚.
  • 同类重组的BRCA1/2功能,复制分叉保护和差距抑制密切交织在一起.

结论:

  • BRCA1和BRCA2的瘤抑制功能并不相互排斥.
  • 这些功能深深地相互联系,并且很可能协同工作.
  • 了解这种相互作用是理解BRCA1/2在基因组稳定性和癌症治疗反应中的作用的关键.