相关实验视频
Updated: Jan 10, 2026

07:55
Visualization of DNA Repair Proteins Interaction by Immunofluorescence
Published on: June 26, 2020
10.9K
核DAB2IP通过激活PLK1介导的HBO1酸化来调节DNA复制的启动
Zeng-Fu Shang1, Lan Yu2, Ciara Newman1
1Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas TX 75390, United States.
Nucleic acids research
|November 20, 2025
概括
禁用同源2相互作用蛋白 (DAB2IP) 促进DNA复制的启动,并保持基因组的稳定性. 它与HBO1的相互作用和CDK1的酸化对DNA复制和细胞平衡至关重要.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学是一种遗传学.
背景情况:
- 禁用同源2相互作用蛋白 (DAB2IP) 是一种已知的瘤抑制剂,参与细胞循环调节.
- 之前的研究将DAB2IP与通过PLK1.1的线粒分裂进展联系起来.
- DAB2IP在DNA复制中的确切作用尚不清楚.
研究的目的:
- 为了研究DAB2IP在DNA复制原始发射中的新功能.
- 阐明DAB2IP在DNA复制中的作用背后的分子机制.
- 了解DAB2IP如何帮助维护基因组完整性.
主要方法:
- 对DAB2IP的核定位和相互作用研究.
- 对HBO1和PLK1相互作用和酸化的分析.
- 评估基因组H3乙化 (H3K14Ac) 和MCM复合物的负载.
- 研究DAB2IP酸化的ATR和CDK1调节.
- 评估基因组不稳定性标记在DAB2IP剥离或酸化缺陷时.
主要成果:
- DAB2IP与核中的HBO1相互作用,增强HBO1-PLK1相互作用和PLK1介导的HBO1酸化.
- HBO1指导的H3K14Ac促进了微染色体维护 (MCM) 对染色体的复杂负载.
- 通过ATR调节的CDK1-介导的DAB2IP酸化对于HBO1-PLK1复合体的形成和激活至关重要.
- 丢失DAB2IP酸化导致基因组不稳定性,不完整的DNA复制,以及超细桥梁和53BP1体的积累.
结论:
- 通过调节HBO1活动,DAB2IP在启动DNA复制方面发挥着至关重要的作用.
- 通过CDK1化DAB2IP对于DNA复制和基因组稳定至关重要.
- 这些发现揭示了DAB2IP在通过DNA复制控制维持细胞平衡的新机制.
相关概念视频
Restarting Stalled Replication Forks
6.2K
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,...
6.2K
S-Cdk Initiates DNA Replication
5.3K
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...
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of...
5.3K
DNA Damage can Stall the Cell Cycle
9.9K
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...
9.9K
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
The Replisome
38.0K
DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with...
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with...
38.0K
Replication in Eukaryotes
17.0K
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...
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
17.0K

