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相关概念视频

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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相关实验视频

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

由自我组织驱动的机械敏感自我复制.

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
概括
此摘要是机器生成的。

发现了两种新的自我复制分子,形成纳米结构. 像摇或动这样的机械力量影响了哪个分子占主导地位,证明了它们在分子进化和合成中的作用.

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

相关实验视频

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

科学领域:

  • * 研究生命起源的研究.
  • * 合成生物学 * 合成生物学
  • * 超分子化学

背景情况:

  • *自我复制的分子对于理解生命起源至关重要.
  • * 确定影响复制动态的因素是关键.
  • * 合成自我复制器为生命早期的过程提供了模型.

研究的目的:

  • * 调查影响自我复制分子之间的竞争因素.
  • * 探索机械力量在分子选择中的作用.
  • * 了解纳米结构的形成如何驱动复制.

主要方法:

  • * 创建一个由酸衍生宏循环组成的小型动态组合图书馆.
  • * 观察两个自我复制的宏循环,竞争一个共同的原料.
  • * 通过组合驱动的复制成β表稳定纤维的分析.
  • *对系统进行机械动 (摇动与动) 的应用.

主要成果:

  • *确定了两个不同的自我复制的基衍生宏循环.
  • *复制取决于自组装纳米结构 (纤维) 的形成.
  • * 一个复制者对另一个复制者的优势受到机械力量 (震动/动) 的显著影响.

结论:

  • * 机械力可以作为竞争的自我复制系统的选择压力.
  • * 共价合成的结果可以通过外部物理因素来调节.
  • *纳米结构的形成是一个关键的机制,驱动这个系统的自我复制.