相关实验视频
Updated: Jun 23, 2026
10:55
Study of the DNA Damage Checkpoint using Xenopus Egg Extracts
Published on: November 5, 2012
Cdc6合成调节了Xenopus卵细胞中的复制能力
Elizabeth Whitmire1, Bettina Khan, Martine Coué
1Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, 3601 4th Street, Lubbock, Texas 79430, USA.
Nature
|October 18, 2002
概括
由于Cdc6蛋白质合成和生殖囊泡分解 (GVBD),卵细胞在半分裂过程中恢复了DNA复制能力. 这些因素对于恢复复制能力在发育性子细胞中至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 发育生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 胚胎的发育取决于卵细胞的DNA复制.
- 卵子细胞在半分裂过程中失去DNA复制能力.
- 恢复复制能力对于配体生产至关重要.
研究的目的:
- 研究卵细胞复制能力丧失的机制,并在化过程中恢复能力.
- 确定限制不成熟卵细胞中DNA复制的关键因素.
主要方法:
- 研究了Xenopus卵子细胞.
- 通过注射操纵Cdc6蛋白水平.
- 在激素刺激和GVBD的反应中观察到DNA复制.
主要成果:
- 由于缺乏Cdc6蛋白和特定蛋白质定位,不成熟的卵细胞无法复制DNA.
- 在不成熟的卵细胞中注射Cdc6并没有诱导复制.
- 在GVBD中将Cdc6注入卵细胞,诱导DNA复制而无需新蛋白质合成.
结论:
- 胚芽囊泡分解 (GVBD) 和Cdc6合成是介质变异期间卵细胞复制能力的唯一决定因素.
- Cdc6蛋白对于恢复卵细胞中DNA复制能力至关重要.
相关概念视频
02:31Replication in Eukaryotes
Overview
02:31Replication in Eukaryotes
Overview
02:38S-Cdk Initiates DNA Replication
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 replication.
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.
01:29Replication 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...
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
02:38S-Cdk Initiates DNA Replication
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 replication.
Two states at the origin of replication
In eukaryotes, the initiation of replication occurs at many sites on the chromosomes, called the origins of replication.
01:29Replication 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...
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...