Temporal dynamics of base excision/single-strand break repair protein complex assembly/disassembly are modulated by the PARP/NAD(+)/SIRT6 axis.
Temporal dynamics of base excision/single-strand break repair protein complex assembly/disassembly are modulated by the PARP/NAD(+)/SIRT6 axis.
复制标题
碱基切除/单链破裂修复蛋白复合物组件/拆卸的时间动力学由PARP/NAD(+)/SIRT6轴调节。
DOI:
10.1016/j.celrep.2021.109917
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发表时间:
2021-11-02
期刊:
影响因子:
8.8
通讯作者:
Sobol RW
中科院分区:
文献类型:
--
作者:
Koczor CA;Saville KM;Andrews JF;Clark J;Fang Q;Li J;Al-Rahahleh RQ;Ibrahim M;McClellan S;Makarov MV;Migaud ME;Sobol RW
Assembly and disassembly of DNA repair protein complexes at DNA damage sites are essential for maintaining genomic integrity. Investigating factors coordinating assembly of the base excision repair (BER) proteins DNA polymerase β (Polβ) and XRCC1 to DNA lesion sites identifies a role for Polβ in regulating XRCC1 disassembly from DNA repair complexes and, conversely, demonstrates Polβ’s dependence on XRCC1 for complex assembly. LivePAR, a genetically encoded probe for live-cell imaging of poly(ADP-ribose) (PAR), reveals that Polβ and XRCC1 require PAR for repair-complex assembly, with PARP1 and PARP2 playing unique roles in complex dynamics. Further, BER complex assembly is modulated by attenuation/augmentation of NAD+ biosynthesis. Finally, SIRT6 does not modulate PARP1 or PARP2 activation but does regulate XRCC1 recruitment, leading to diminished Polβ abundance at sites of DNA damage. These findings highlight coordinated yet independent roles for PARP1, PARP2, and SIRT6 and their regulation by NAD+ bioavailability to facilitate BER. Koczor et al. use quantitative confocal microscopy to characterize DNA-damage-induced poly(ADP-ribose) (PAR) formation and assembly/disassembly kinetics in human cells. These studies highlight the coordinated yet independent roles for XRCC1, POLΒ, PARP1, PARP2, and SIRT6 (and regulation by NAD+) to facilitate BER/SSBR protein complex dynamics.
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影响因子:
11.4
作者:
Kubota, Y;Nash, RA;Lindahl, T
通讯作者:
Lindahl, T
影响因子:
2.9
作者:
Menge, KL;Hostomsky, Z;Hostomska, Z
通讯作者:
Hostomska, Z
影响因子:
7.4
作者:
Abbotts R;Wilson DM 3rd
通讯作者:
Wilson DM 3rd
DOI:
10.3791/56265
发表时间:
2017-09-05
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
作者:
Holton NW;Andrews JF;Gassman NR
通讯作者:
Gassman NR
影响因子:
14.9
作者:
Fang, Qingming;Andrews, Joel;Sobol, Robert W.
通讯作者:
Sobol, Robert W.