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Mechanisms and functions of DNA mismatch repair Li GMCell Res 2008[Jan]; 18 (1): 85-98DNA mismatch repair (MMR) is a highly conserved biological pathway that plays a key role in maintaining genomic stability. The specificity of MMR is primarily for base-base mismatches and insertion/deletion mispairs generated during DNA replication and recombination. MMR also suppresses homeologous recombination and was recently shown to play a role in DNA damage signaling in eukaryotic cells. Escherichia coli MutS and MutL and their eukaryotic homologs, MutSalpha and MutLalpha, respectively, are key players in MMR-associated genome maintenance. Many other protein components that participate in various DNA metabolic pathways, such as PCNA and RPA, are also essential for MMR. Defects in MMR are associated with genome-wide instability, predisposition to certain types of cancer including hereditary non-polyposis colorectal cancer, resistance to certain chemotherapeutic agents, and abnormalities in meiosis and sterility in mammalian systems.|*DNA Mismatch Repair[MESH]|Animals[MESH]|DNA/metabolism[MESH]|Humans[MESH]|Metabolic Networks and Pathways/physiology[MESH]|Models, Biological[MESH]|Neoplasms/genetics[MESH]|Signal Transduction/physiology[MESH] |
