ENZYMES ACTING AT STRAND INTERRUPTIONS IN DNA

被引:31
作者
LINDAHL, T
SATOH, MS
DIANOV, G
机构
[1] Imperial Cancer Research Fund, Clare Hall Laboratories, Hertfordshire, South Mimms
关键词
D O I
10.1098/rstb.1995.0009
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Endogenous and environmental DNA-damaging agents often generate single-strand interruptions in DNA. The lesions trigger a complex set of cellular reactions. In most eukaryotic cells, cellular poly(ADP-ribose) formation is the most acute response to such damage. Recently, such events have been amenable to study with soluble cell-free extracts of human cells. These investigations clarify the modulating role on DNA repair by poly (ADP-ribose), and suggest that the primary function of this unusual polymer is to act as an antirecombinant agent. Similar biochemical studies of subsequent repair events have revealed a branched pathway for the ubiquitous DNA base excision-repair process. The alternative pathway provides the cell with back-up functions for individual steps in this essential form of DNA repair.
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收藏
页码:57 / 62
页数:6
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