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Updated: Mar 15, 2026

Preparation of the Mgm101 Recombination Protein by MBP-based Tagging Strategy
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Mgm101: A double-duty Rad52-like protein.

Jana Rendeková1, Thomas A Ward2, Lucia Šimoničová3

  • 1a Department of Genetics , Cancer Research Institute, Biomedical Research Center, Slovak Academy of Science , Bratislava , Slovak Republic.

Cell Cycle (Georgetown, Tex.)
|September 17, 2016
PubMed
Summary

Mgm101 protein aids in DNA repair and replication. It functions similarly to Rad52, particularly at telomeres, promoting DNA repair and telomere elongation in yeast.

Keywords:
DNA interstrand cross-link repairFanconi anemiaMgm101Rad52mitochondrial DNAtelomereyeast

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Area of Science:

  • Molecular Biology
  • Genetics
  • DNA Repair

Background:

  • Mgm101 is known for mitochondrial DNA repair and replication.
  • Recent studies implicate Mgm101 in nuclear DNA metabolism, specifically in an S-phase DNA interstrand cross-link repair pathway.
  • This pathway involves Fanconi anemia-like proteins and redundantly functions with Pso2 exonuclease.

Purpose of the Study:

  • To elucidate the precise role of Mgm101 in the Fanconi anemia-like DNA repair pathway.
  • To investigate the functional overlap between Mgm101 and Rad52.
  • To determine Mgm101's function at telomeres.

Main Methods:

  • Investigated Mgm101's interaction with Mph1 helicase and MutSα heterodimer.
  • Assessed functional overlap between Mgm101 and Rad52.
  • Examined Mgm101's role in telomere elongation in rad52-defective cells.

Main Results:

  • Mgm101 shows functional overlap with Rad52, supporting their classification as a protein family with similar functions.
  • Mgm101 is essential for telomere elongation in rad52-defective cells.
  • Mgm101 may bind and stabilize single-stranded DNA, mediating homologous recombination.

Conclusions:

  • Mgm101 possesses a Rad52-like function in DNA repair and telomere maintenance.
  • Mgm101 stabilizes single-stranded DNA structures at replication forks, broken chromosomes, and telomeres.
  • This stabilization facilitates homologous recombination, preventing the formation of toxic DNA structures.