该ORFIUS复合体调节在复制起源的ORC2定位.
Zelei Yang1, Saie Mogre1, Ruiyang He1
1Department of Medical Oncology and Division of Molecular and Cellular Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA.
NAR cancer
|January 30, 2024
概括
在卵巢癌中,BRD1通过形成ORFIUS复合体来抑制复制应激,该复合体调节DNA复制起源. 在高度血清性卵巢癌 (HGSC) 中,这种复合物的失调可能会推动瘤的存活率.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 遗传学 遗传学 是一个
背景情况:
- 高度血清性卵巢癌 (HGSC) 的特点是高复制压力 (RS) 和受损的DNA损伤反应.
- 了解调节压力下DNA复制起源的机制对于开发新的癌症疗法至关重要.
研究的目的:
- 调查含原蛋白蛋白1 (BRD1) 在调节HGSC.在复制应激期间的复制起源中的作用.
- 确定参与压力下原产地调节的蛋白质复合物及其在HGSC病原发生中的潜在作用.
主要方法:
- 共同免疫沉以确定蛋白质相互作用.
- 免疫光显微镜用于评估在复制起源的蛋白质定位.
- 基于细胞的测试来评估原始发射和DNA损伤反应.
主要成果:
- BRD1与HBO1,BRCA1和BARD1.1一起形成了压力下源源复合体 (ORFIUS).
- BRD1和HBO1支持原产地许可蛋白质ORC2的本地化,促进原产地发射.
- 在HGSC细胞中,ORFIUS复合体是失调的,仍然与原点相关,对压力信号无反应,导致尽管DNA受损,但原点发射增加.
结论:
- BRD1是ORFIUS复合物的关键组成部分,通过调节DNA复制起源来抑制复制应激.
- 在HGSC中ORFIUS复杂失调有助于瘤细胞生存,允许在DNA损伤下持续复制和细胞周期进展.
- ORFIUS综合体代表了HGSC.的潜在治疗目标.
相关概念视频
Replication in Eukaryotes
13.8K
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...
13.8K
S-Cdk Initiates DNA Replication
4.7K
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...
4.7K
Chromosome Replication
8.7K
Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins. This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin...
8.7K
Replication in Prokaryotes
24.9K
DNA replication has three main steps: initiation, elongation, and termination. Replication in prokaryotes begins when initiator proteins bind to the single origin of replication (ori) on the cell's circular chromosome. Replication then proceeds around the entire circle of the chromosome in each direction from the two replication forks, resulting in two DNA molecules.
Many Proteins Work Together to Replicate the Chromosome
Replication is coordinated and carried out by a host of specialized...
Many Proteins Work Together to Replicate the Chromosome
Replication is coordinated and carried out by a host of specialized...
24.9K
Chromosome Structure
22.8K
A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
22.8K
The DNA Replication Fork
36.0K
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...
36.0K


