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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 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
Chromosome Structure02:40

Chromosome Structure

A functional eukaryotic chromosome must contain three elements: a centromere, telomeres, and numerous origins of replication.
The centromere is a DNA sequence that links sister chromatids. This is also where kinetochores, protein complexes to which spindle microtubules attach, are constructed after the chromosome is replicated. The kinetochores allow the spindle microtubules to move the chromosomes within the cell during cell division.
Telomeres consist of non-coding repetitive nucleotide...
The Replisome03:01

The Replisome

DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with the...

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Updated: Jun 14, 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

自己組織によって駆動される機械感性自己複製.

Jacqui M A Carnall1, Christopher A Waudby, Ana M Belenguer

  • 1University of Cambridge, Department of Chemistry, Lensfield Road, Cambridge CB2 1EW, UK.

Science (New York, N.Y.)
|March 20, 2010
PubMed
まとめ
この要約は機械生成です。

ナノ構造を形成する2つの新しい自己複製分子が発見されました. 振動や振動のような機械的な力は,どの分子が優位であったかを影響し,分子進化と合成におけるその役割を実証した.

さらに関連する動画

In Vitro Reconstitution of Self-Organizing Protein Patterns on Supported Lipid Bilayers
08:10

In Vitro Reconstitution of Self-Organizing Protein Patterns on Supported Lipid Bilayers

Published on: July 28, 2018

Self-Assembly of Microtubule Tactoids
08:49

Self-Assembly of Microtubule Tactoids

Published on: June 23, 2022

関連する実験動画

Last Updated: Jun 14, 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

In Vitro Reconstitution of Self-Organizing Protein Patterns on Supported Lipid Bilayers
08:10

In Vitro Reconstitution of Self-Organizing Protein Patterns on Supported Lipid Bilayers

Published on: July 28, 2018

Self-Assembly of Microtubule Tactoids
08:49

Self-Assembly of Microtubule Tactoids

Published on: June 23, 2022

科学分野:

  • *生命の起源に関する研究
  • * 合成生物学について
  • * 超分子化学について

背景:

  • *自己複製する分子は,生命の起源を理解する上で極めて重要です.
  • * 複製ダイナミクスに影響を与える要因を特定することが鍵となる.
  • * 合成自己複製器は,生命の初期過程のモデルを提供します.

研究 の 目的:

  • *自己複製分子間の競争に影響を与える要因を調査する.
  • * 分子選択における機械力の役割を調査する.
  • * ナノ構造の形成がどのように複製を促すかを理解する.

主な方法:

  • *ペプチド由来マクロサイクルの小さなダイナミックな組み合わせライブラリを作成.
  • * 2つの自己複製マクロサイクルが共通の原料のために競争している観測.
  • * ペプチドアセンブリによってベータシートで安定した繊維に誘発された複製の分析.
  • * 機械的な振動 (振動と振動) をシステムに適用する.

主要な成果:

  • *2つの異なる自己複製ペプチド由来マクロサイクルが特定されました.
  • *複製は,自己組み立てナノ構造 (繊維) の形成に依存していた.
  • * あるレプリカーターが他のレプリカーターを優位にすることは,機械的な力 (振動/振動) によって著しく影響を受けた.

結論:

  • * 機械的な力は,競合する自己複製システムにおける選択圧力として作用する.
  • * 協和合成の結果は,外部の物理的要因によって調節され得る.
  • * ナノ構造の形成は,このシステムにおける自己複製を推進する重要なメカニズムです.