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関連する概念動画

Replication in Eukaryotes01:29

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...
Replication in Eukaryotes02:31

Replication in Eukaryotes

Overview
Replication in Eukaryotes02:31

Replication in Eukaryotes

Overview
Replication in Eukaryotes01:29

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...
Replication in Prokaryotes01:32

Replication in Prokaryotes

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...
Replication in Prokaryotes02:35

Replication in Prokaryotes

Overview

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関連する実験動画

Updated: Jul 12, 2026

Hybrid Ensemble and Single-molecule Assay to Image the Motion of Fully Reconstituted CMG
10:11

Hybrid Ensemble and Single-molecule Assay to Image the Motion of Fully Reconstituted CMG

Published on: July 26, 2024

複製の起源の認識と変形は,ヘテロディメリックアーカイアルオーク1複合体によって行われます.

Erin L Cunningham Dueber1, Jacob E Corn, Stephen D Bell

  • 1Miller Institute for Basic Research in Science, 2536 Channing Way 5190, University of California, Berkeley, CA 94720, USA.

Science (New York, N.Y.)
|September 1, 2007
PubMed
まとめ

DNA複製の開始要因は,遺伝物質の複製に極めて重要です. 研究者らは,起源DNAに結合した古代のイニシアターの構造を明らかにし,DNAを認識し,複製を開始する方法を示しました.

科学分野:

  • 分子生物学は分子生物学である.
  • 構造生物学 構造生物学とは
  • 遺伝学 遺伝学とは

背景:

  • 忠実なDNA複製は,遺伝的安定性にとって極めて重要です.
  • DNA複製の開始要因は,複製の起源で高階構造に組み合わされる.
  • これらのイニシアターでは,アデノシントリフォスファート (ATP) を利用してDNAを改造し,複製機構の負荷を容易にします.

研究 の 目的:

  • DNA複製イニシアター機能の構造的基礎を解明する.
  • イニシエーターがどのように認識し,起源のDNAに結合するかを理解する.
  • イニシアター-DNA相互作用におけるAAA+ ATPaseドメインの役割を調査する.

主な方法:

  • 起源DNAに結合した古代のCdc6/Orc1ヘテロダイマーの3.4アングストロム解像度の結晶構造を決定しました.
  • AAA+/DNA接触のダイナミクスを研究するために生化学分析を行った.
  • 進化的な保全を評価するために比較分析を行った.

主要な成果:

  • この構造は,AAA+ ATPaseドメインが,従来のDNA結合要素に加えて,起源DNAを認識することを明らかにした.
  • これらの相互作用は,起源上のイニシアターアセンブリの極性を決定する.

さらに関連する動画

Visualizing the Interaction Between the Qdot-labeled Protein and Site-specifically Modified λ DNA at the Single Molecule Level
08:56

Visualizing the Interaction Between the Qdot-labeled Protein and Site-specifically Modified λ DNA at the Single Molecule Level

Published on: July 17, 2018

Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method
08:53

Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method

Published on: May 2, 2025

関連する実験動画

Last Updated: Jul 12, 2026

Hybrid Ensemble and Single-molecule Assay to Image the Motion of Fully Reconstituted CMG
10:11

Hybrid Ensemble and Single-molecule Assay to Image the Motion of Fully Reconstituted CMG

Published on: July 26, 2024

Visualizing the Interaction Between the Qdot-labeled Protein and Site-specifically Modified λ DNA at the Single Molecule Level
08:56

Visualizing the Interaction Between the Qdot-labeled Protein and Site-specifically Modified λ DNA at the Single Molecule Level

Published on: July 17, 2018

Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method
08:53

Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method

Published on: May 2, 2025

  • 起源DNA鎖の実質的な歪みは,イニシアター結合によって誘発された.
  • AAA+/DNAの接触は,ダイナミックで進化的に保存されていることが判明しました.

    • 結論:

    • 研究された考古学的Cdc6 / Orc1複合体は,基礎DNA複製開始機構のコアコンポーネントを表しています.
    • AAA+ドメインは,起源DNAのイニシアター認識において保存された役割を果たします.
    • この発見は,DNA複製の開始の基本的メカニズムについての洞察を提供します.