複製の酵母起源は,S相の後半に活性化されます
B M Ferguson1, B J Brewer, A E Reynolds
1Department of Genetics SK-50, University of Washington, Seattle 98195.
Cell
|May 3, 1991
まとめ
大型の真核染色体領域は,レプリケーションの起源の遅い活性化による遅い複製であり,遅いフォークの動きではありません. この研究は,発射制御の複製パターンの起源のタイミングを明らかにします.
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
- 細胞生物学 細胞生物学
背景:
- ユカリオットのDNA複製のタイミングの調節を理解することは,ゲノム安定性と細胞サイクル制御を理解するために重要です.
- 大型の染色体ドメインはS相の後半に複製することが知られているが,その基礎となるメカニズムはほとんど不明のままである.
研究 の 目的:
- テロメアに隣接するDNAの遅い複製に起因するメカニズムの調査をeukaryotic染色体.
- 複製の遅延が遅い複製フォークの進行または複製の起源の遅い活性化によるものであるかどうかを判断する.
主な方法:
- 複製の活性起源を特定し,分析するために二次元ゲル電泳を用いた.
- 特定の染色体領域における複製フォークの動きの速度を測定するための運動分析を行った.
主要な成果:
- Saccharomyces cerevisiaeの染色体Vに67kbのテロメアに隣接する領域を特定し,S相の後半に複製する.
- この領域内のARS要素であるARS501が,複製の活性起源として機能することを確認しました.
- この後期複製領域における複製フォークの速度が,早期複製領域と比較できると示した.
結論:
- この染色体領域の遅延複製は,主にその複製起源 (ARS501) の遅延活性化によって引き起こされます.
- これらの発見は,起源活性化の時間的調節が,真核染色体で観察された早期および遅い複製のパターンを決定するという仮説を支持する.
関連する概念動画
Replication in Eukaryotes
Overview
Replication in Eukaryotes
Overview
S-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.
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...
S-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.
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...


