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DNA mismatch repair system. Classical and fresh roles
Sung-Hoon Jun1, Tae Gyun Kim, Changill Ban
1Department of Chemistry and Division of Molecular & Life Science, Pohang University of Science and Technology, Korea.
The FEBS Journal
|April 21, 2006
Summary
The DNA mismatch repair (MMR) system
Area of Science:
- Molecular biology
- Genetics
- Biochemistry
Background:
- The molecular mechanisms of DNA mismatch repair (MMR) have been elucidated, particularly in prokaryotes.
- Prokaryotic MMR protein functions provide a foundation for studying eukaryotic MMR systems due to evolutionary conservation.
- Eukaryotic MMR proteins exhibit diverse roles beyond basic repair, especially in multicellular organisms.
Purpose of the Study:
- To summarize recent advancements in understanding both prokaryotic and eukaryotic MMR systems.
- To describe novel functions of MMR proteins in areas like DNA damage surveillance and antibody diversification.
Main Methods:
- Comparative analysis of MMR systems across prokaryotes and eukaryotes.
- Review of recent research on MMR protein functions.
Main Results:
- Conservation of MMR protein functions from bacteria to humans.
- Eukaryotic MMR proteins have evolved specialized roles, leading to pleiotropic phenotypes.
- New functions include DNA damage surveillance and antibody diversification.
Conclusions:
- MMR systems are conserved but have evolved diverse functions in eukaryotes.
- MMR proteins play critical roles in genomic stability and adaptive immunity.