相关实验视频
Updated: Jul 11, 2026

07:27
Direct Restart of a Replication Fork Stalled by a Head-On RNA Polymerase
Published on: April 30, 2010
在酵母核糖体RNA基因的3'端的复制分叉屏障
1Department of Genetics, University of Washington, Seattle 98195.
Cell
|November 18, 1988
概括
复制分叉移动与转录在酵母核糖体DNA (rDNA) 重复. 转录在基因的3'端创建复制分叉屏障 (RFB),阻止对立的分叉.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 酵母生物学的酵母生物学
背景情况:
- 酵母菌的核糖体RNA基因 (rDNA) 包含200个连续重复.
- 复制开始在rDNA重复的子集内.
- 转录和复制在rDNA重复中同时发生.
研究的目的:
- 为了研究酵母rDNA基因集群中的复制叉运动.
- 了解rDNA中转录和复制之间的相互作用.
主要方法:
- 使用二维 (2D) 糖凝电泳.
- 基于分支DNA结构的独特分子,用于分析复制中间体.
主要成果:
- 复制分叉主要以与RNA聚合酶I转录相同的方向移动.
- 在转录单元的3'端发现了一种复制分叉屏障 (RFB).
- RFB积累了特定的分支中间体,表明停滞的叉子.
结论:
- 转录影响了酵母rDNA中的复制叉的进展.
- 活跃转录的基因的3'端作为对抗复制叉的障碍.
- 这表明在基因集群中协调复制和转录的机制.
相关概念视频
Replication in Eukaryotes
Overview
Replication in Eukaryotes
Overview
The DNA Replication Fork
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 forks, one in...
The DNA Replication Fork
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 forks, one in...
Replication 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...
Replication 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...

