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Error-prone repair DNA polymerases in prokaryotes and eukaryotes
1Department of Biological Sciences and Chemistry, Hedco Molecular Biology Laboratory, University of Southern California, Los Angeles, California 90089-1340, USA. mgoodman@mizar.usc.edu
Annual Review of Biochemistry
|June 5, 2002
Summary
Y-family DNA polymerases are key to DNA repair, enabling cells to replicate through damage. These error-prone enzymes play vital roles in mutagenesis and immunoglobulin gene hypermutation.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- DNA repair is essential for all life forms.
- Y-family DNA polymerases have been recently discovered.
- These polymerases exhibit unique replication properties, including low accuracy and ability to bypass DNA damage.
Purpose of the Study:
- To review the error-prone Y-family DNA polymerases.
- To discuss their roles in various DNA repair pathways.
- To explore the implications of their involvement in multiple pathways.
Main Methods:
- Mechanistic studies of Y-family DNA polymerases.
- Review of literature on DNA repair pathways involving these enzymes.
- Discussion of enzyme targeting and trafficking.
Main Results:
- Y-family polymerases are error-prone, favoring non-Watson-Crick base pairs and efficient mismatch extension.
- They are crucial for replicating through DNA damage.
- These enzymes are involved in UV-induced mutagenesis, adaptive mutation, skin cancer avoidance, and immunoglobulin gene hypermutation.
Conclusions:
- Y-family DNA polymerases are critical for diverse DNA repair processes.
- Their error-prone nature is essential for specific repair outcomes.
- Further research is needed to understand their complex roles in targeting and trafficking within replication-repair factories.