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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
Genome Copying Errors02:46

Genome Copying Errors

DNA replication is a well-evolved process that copies millions of base pairs with high fidelity during each cell division. Occasionally a wrong base or a long stretch of wrong bases may get added to the daughter strands. If the errors are left unchecked, cells might accumulate several mutations that might endanger their  survival. Therefore, the copying errors are checked and repaired at three levels.
The DNA Replication Fork01:02

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...

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Video Experimental Relacionado

Updated: May 30, 2026

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique
07:18

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique

Published on: October 27, 2011

Los genes atados se comprueban durante la replicación.

Jiri Lukas1, Jiri Bartek

  • 1Centre for Genotoxic Stress Research, Danish Cancer Society, Strandboulevarden 49, DK-2100 Copenhagen, Denmark. jil@cancer.dk

Cell
|July 26, 2011
PubMed
Resumen
Este resumen es generado por máquina.

Los puntos de control de estrés de replicación mantienen la integridad del genoma. Bermejo y otros. (2011) revelan un vínculo entre la función de punto de control y el alivio de la tensión topológica en los genes cercanos a los poros nucleares.

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Chromosome Replicating Timing Combined with Fluorescent In situ Hybridization
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Chromosome Replicating Timing Combined with Fluorescent In situ Hybridization

Published on: December 10, 2012

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Last Updated: May 30, 2026

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique
07:18

Visualization of DNA Replication in the Vertebrate Model System DT40 using the DNA Fiber Technique

Published on: October 27, 2011

Chromosome Replicating Timing Combined with Fluorescent In situ Hybridization
17:14

Chromosome Replicating Timing Combined with Fluorescent In situ Hybridization

Published on: December 10, 2012

Área de la Ciencia:

  • Biología celular Biología celular.
  • La genómica es la genómica.
  • Biología Molecular Biología Molecular

Sus antecedentes:

  • El estrés de replicación es crucial para la activación del punto de control.
  • Es esencial mantener la integridad del genoma replicante.
  • Los mecanismos precisos no se comprenden completamente.

Objetivo del estudio:

  • Identificar un nuevo mecanismo que conecte la activación del punto de control con la resolución de la tensión topológica.
  • Para dilucidar cómo las células mantienen la integridad de la replicación de los genomas bajo estrés.

Principales métodos:

  • El estudio realizado por Bermejo et al. (2011) investigó la relación entre la replicación del ADN, el control del punto de control y la estabilidad del genoma.
  • Se analizaron vías moleculares específicas para comprender el papel del alivio de la tensión topológica.

Principales resultados:

  • Se identificó un vínculo directo entre la función del punto de control y el alivio de la tensión topológica.
  • Este mecanismo opera en genes atados a poros nucleares, lo que sugiere un componente espacial para el mantenimiento del genoma.

Conclusiones:

  • Los hallazgos revelan una nueva vía para mantener la integridad del genoma durante el estrés de la replicación.
  • Este mecanismo pone de relieve la importancia de la gestión de la tensión topológica para prevenir la inestabilidad genómica.