関連する実験動画
Updated: Jul 11, 2026

07:27
Direct Restart of a Replication Fork Stalled by a Head-On RNA Polymerase
Published on: April 30, 2010
酵母リボソームRNA遺伝子の3'端にある複製フォークバリア
1Department of Genetics, University of Washington, Seattle 98195.
Cell
|November 18, 1988
まとめ
レプリケーションフォークは,酵母菌のリボソームDNA (rDNA) のリピートにおけるトランスクリプションとともに移動する. トランスクリプションは,遺伝子の3'端で複製フォークバリア (RFB) を生成し,反対のフォークを停止させます.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- イースト生物学 イースト生物学
背景:
- 酵母菌のリボソームRNA遺伝子 (rDNA) は,約200個のタンデムリピートで構成されています.
- 複製は,rDNAの重複のサブセットの中で開始されます.
- 転写と複製はrDNAの繰り返しで同時に発生する.
研究 の 目的:
- イーストのrDNA遺伝子群内の複製フォークの動きを調査する.
- rDNAにおける転写と複製の相互作用を理解する.
主な方法:
- 二次元 (2D) アガロースゲル電泳を用いた.
- 複製中介物質を分析するために,分岐DNA構造に基づく区別された分子.
主要な成果:
- 複製フォークは,主にRNAポリメラーゼIトランスクリプションと同じ方向に移動します.
- 複製フォークバリア (RFB) は,転写ユニットの3'端で特定されました.
- RFBは特定の枝分かれした中間物質を蓄積し,停滞したフォークを示します.
結論:
- 転写は,酵母rDNAにおける複製フォークの進行に影響を与える.
- 活発に転写された遺伝子の3'端は,対抗する複製フォークに対する障壁として作用する.
- これは,遺伝子クラスターにおける複製と転写を調整するメカニズムを示唆している.
関連する概念動画
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...

