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2017 ; 18
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): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
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English Wikipedia
Regulation of DNA Repair Mechanisms: How the Chromatin Environment Regulates the
DNA Damage Response
#MMPMID28783053
Stadler J
; Richly H
Int J Mol Sci
2017[Aug]; 18
(8
): ä PMID28783053
show ga
Cellular DNA is constantly challenged by damage-inducing factors derived from
exogenous or endogenous sources. In order to maintain genome stability and
integrity, cells have evolved a wide variety of DNA repair pathways which
counteract different types of DNA lesions, also referred to as the DNA damage
response (DDR). However, DNA in eukaryotes is highly organized and compacted into
chromatin representing major constraints for all cellular pathways, including DNA
repair pathways, which require DNA as their substrate. Therefore, the chromatin
configuration surrounding the lesion site undergoes dramatic remodeling to
facilitate access of DNA repair factors and subsequent removal of the DNA lesion.
In this review, we focus on the question of how the cellular DNA repair pathways
overcome the chromatin barrier, how the chromatin environment is rearranged to
facilitate efficient DNA repair, which proteins mediate this re-organization
process and, consequently, how the altered chromatin landscape is involved in the
regulation of DNA damage responses.