Functional interactions and signaling properties of mammalian DNA mismatch repair proteins - PubMed (original) (raw)

Review

. 2001 Nov;8(11):1076-92.

doi: 10.1038/sj.cdd.4400948.

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• PMID: 11687886
• DOI: 10.1038/sj.cdd.4400948

Review

Functional interactions and signaling properties of mammalian DNA mismatch repair proteins

A Bellacosa. Cell Death Differ. 2001 Nov.

Abstract

The mismatch repair (MMR) system promotes genomic fidelity by repairing base-base mismatches, insertion-deletion loops and heterologies generated during DNA replication and recombination. This function is critically dependent on the assembling of multimeric complexes involved in mismatch recognition and signal transduction to downstream repair events. In addition, MMR proteins coordinate a complex network of physical and functional interactions that mediate other DNA transactions, such as transcription-coupled repair, base excision repair and recombination. MMR proteins are also involved in activation of cell cycle checkpoint and induction of apoptosis when DNA damage overwhelms a critical threshold. For this reason, they play a role in cell death by alkylating agents and other chemotherapeutic drugs, including cisplatin. Inactivation of MMR genes in hereditary and sporadic cancer is associated with a mutator phenotype and inhibition of apoptosis. In the future, a deeper understanding of the molecular mechanisms and functional interactions of MMR proteins will lead to the development of more effective cancer prevention and treatment strategies.

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