Formation and repair of unavoidable, endogenous interstrand cross-links in cellular DNA.

Formation and repair of unavoidable, endogenous interstrand cross-links in cellular DNA.
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细胞DNA中不可避免的内源性链间交联的形成和修复。

DOI:
10.1016/j.dnarep.2020.103029
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发表时间:
2021-03
期刊:
影响因子:
3.8
通讯作者:
Gates KS
Gates KS
中科院分区:
医学3区
文献类型:
--
作者:
Housh K;Jha JS;Haldar T;Amin SBM;Islam T;Wallace A;Gomina A;Guo X;Nel C;Wyatt JW;Gates KS

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基因组完整性对生命至关重要,因此,DNA修复系统进化为从细胞DNA中去除不可避免的DNA损伤。许多生命形式都具有从其基因组中去除链间DNA交联(ICL)的能力,但驱动这些DNA修复系统在各种生命形式中进化和保留的天然内源性底物的身份仍然不确定。在这篇综述中,我们描述了十几种化学过程,内源性ICLs可通过这些过程引入细胞DNA。大多数涉及DNA降解过程,将醛残基引入双螺旋或DNA与内源性低分子量醛代谢物的反应。少量的交联过程涉及由氧化产生的DNA自由基的反应。
Genome integrity is essential for life and, as a result, DNA repair systems evolved to remove unavoidable DNA lesions from cellular DNA. Many forms of life possess the capacity to remove interstrand DNA cross-links (ICLs) from their genome but the identity of the naturally-occurring, endogenous substrates that drove the evolution and retention of these DNA repair systems across a wide range of life forms remains uncertain. In this review, we describe more than a dozen chemical processes by which endogenous ICLs plausibly can be introduced into cellular DNA. The majority involve DNA degradation processes that introduce aldehyde residues into the double helix or reactions of DNA with endogenous low molecular weight aldehyde metabolites. A smaller number of the cross-linking processes involve reactions of DNA radicals generated by oxidation.
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