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Related Concept Videos

DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
DNA Damage Can Stall the Cell Cycle02:36

DNA Damage Can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
Homologous Recombination02:31

Homologous Recombination

The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
Homologous Recombination02:31

Homologous Recombination

The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
Fixing Double-strand Breaks02:04

Fixing Double-strand Breaks

The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
Fixing Double-strand Breaks02:04

Fixing Double-strand Breaks

The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...

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Related Experiment Video

Updated: Jun 15, 2026

Visualization of DNA Repair Proteins Interaction by Immunofluorescence
07:55

Visualization of DNA Repair Proteins Interaction by Immunofluorescence

Published on: June 26, 2020

StIKKing together: do multiple IKK pathways cooperate in the DNA-damage response?

David F Allison1, Marty W Mayo

  • 1Department of Biochemistry and Molecular Genetics, Box 800733, University of Virginia, Charlottesville, VA 22908, USA.

Molecular Cell
|March 2, 2010
PubMed
Summary

Genotoxic stress activates IKK-epsilon, a key kinase, through SUMOylation to control NF-kappaB transcription and cell survival. This study elucidates the role of IKK-related kinases in DNA-damage response pathways.

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Last Updated: Jun 15, 2026

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Area of Science:

  • Molecular biology
  • Cellular signaling
  • Immunology

Background:

  • IKK-related kinases are recognized for their role in immune system regulation.
  • The involvement of these kinases in DNA-damage response pathways remained largely unexplored prior to this study.

Discussion:

  • Renner et al. demonstrate that genotoxic stress necessitates SUMOylated IKK-epsilon.
  • This SUMOylated form of IKK-epsilon is crucial for regulating NF-kappaB transcription.
  • The study highlights a novel mechanism linking DNA damage to cell survival pathways.

Key Insights:

  • IKK-epsilon, when SUMOylated, plays a critical role in the cellular response to DNA damage.
  • The regulation of NF-kappaB transcription by IKK-epsilon is a key finding.
  • This research establishes a link between genotoxic stress, kinase SUMOylation, and cell fate.

Outlook:

  • Further investigation into the precise mechanisms of IKK-epsilon SUMOylation in DNA damage.
  • Exploring therapeutic strategies targeting this pathway for cancer treatment.
  • Understanding the broader implications of IKK-related kinases in cellular stress responses.