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Mismatch Repair01:36

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Mismatch Repair01:36

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Homologous Recombination02:31

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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...
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DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart, a...
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Updated: May 11, 2026

Preparation of the Mgm101 Recombination Protein by MBP-based Tagging Strategy
11:40

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Published on: June 25, 2013

The MRE11 complex: starting from the ends.

Travis H Stracker1, John H J Petrini

  • 1Institute for Research in Biomedicine Barcelona, C/ Baldiri Reixac 10, 08028 Barcelona, Spain. travis.stracker@irbbarcelona.org

Nature Reviews. Molecular Cell Biology
|January 22, 2011
PubMed
Summary
This summary is machine-generated.

The DNA damage response (DDR) network maintains genome stability by repairing DNA double-strand breaks. Defects in this essential repair process, involving the MRE11 complex, lead to cancer and developmental disorders.

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Last Updated: May 11, 2026

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Genome stability is crucial for preventing diseases like cancer.
  • The DNA damage response (DDR) network orchestrates DNA repair pathways.
  • The MRE11 complex is a key component of the DDR, essential for managing DNA double-strand breaks.

Purpose of the Study:

  • To elucidate the structure and function of the MRE11 complex within the DDR.
  • To understand the implications of MRE11 complex dysfunction in human pathologies.
  • To investigate the role of the DDR in preventing genomic instability and cancer.

Main Methods:

  • In vitro structural analysis of the MRE11 complex.
  • Studies utilizing animal models with deficient DDR pathways.
  • Biochemical assays to assess DNA repair mechanisms.

Main Results:

  • Recent structural insights into the MRE11 complex have been obtained.
  • Studies in animal models highlight the critical role of the MRE11 complex in DDR.
  • Defects in the DDR, particularly involving MRE11, are linked to human diseases.

Conclusions:

  • The MRE11 complex is central to maintaining genome stability through the DDR.
  • Understanding MRE11 complex function is vital for addressing hereditary pathologies and cancer.
  • Further research into DDR mechanisms will advance therapeutic strategies for DNA damage-related diseases.