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2013 ; 5
(4
): a012633
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Postreplicative mismatch repair
#MMPMID23545421
Jiricny J
Cold Spring Harb Perspect Biol
2013[Apr]; 5
(4
): a012633
PMID23545421
show ga
The mismatch repair (MMR) system detects non-Watson-Crick base pairs and strand
misalignments arising during DNA replication and mediates their removal by
catalyzing excision of the mispair-containing tract of nascent DNA and its
error-free resynthesis. In this way, MMR improves the fidelity of replication by
several orders of magnitude. It also addresses mispairs and strand misalignments
arising during recombination and prevents synapses between nonidentical DNA
sequences. Unsurprisingly, MMR malfunction brings about genomic instability that
leads to cancer in mammals. But MMR proteins have recently been implicated also
in other processes of DNA metabolism, such as DNA damage signaling, antibody
diversification, and repair of interstrand cross-links and oxidative DNA damage,
in which their functions remain to be elucidated. This article reviews the
progress in our understanding of the mechanism of replication error repair made
during the past decade.
|*Base Pair Mismatch
[MESH]
|*DNA Mismatch Repair
[MESH]
|*DNA Repair
[MESH]
|Amino Acid Sequence
[MESH]
|Animals
[MESH]
|DNA Damage
[MESH]
|DNA/metabolism
[MESH]
|Escherichia coli Proteins/genetics
[MESH]
|Escherichia coli/genetics/metabolism
[MESH]
|Humans
[MESH]
|Molecular Sequence Data
[MESH]
|MutS DNA Mismatch-Binding Protein/genetics
[MESH]