The role of catalytic and regulatory domains of human PrimPol in DNA binding and synthesis.
The role of catalytic and regulatory domains of human PrimPol in DNA binding and synthesis.
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DOI:
10.1093/nar/gkad507
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发表时间:
2023-08-11
影响因子:
14.9
通讯作者:
中科院分区:
文献类型:
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Human PrimPol possesses DNA primase and DNA polymerase activities and restarts stalled replication forks protecting cells against DNA damage in nuclei and mitochondria. The zinc-binding motif (ZnFn) of the C-terminal domain (CTD) of PrimPol is required for DNA primase activity but the mechanism is not clear. In this work, we biochemically demonstrate that PrimPol initiates de novo DNA synthesis in cis-orientation, when the N-terminal catalytic domain (NTD) and the CTD of the same molecule cooperate for substrates binding and catalysis. The modeling studies revealed that PrimPol uses a similar mode of initiating NTP coordination as the human primase. The ZnFn motif residue Arg417 is required for binding the 5′-triphosphate group that stabilizes the PrimPol complex with a DNA template-primer. We found that the NTD alone is able to initiate DNA synthesis, and the CTD stimulates the primase activity of NTD. The regulatory role of the RPA-binding motif in the modulation of PrimPol binding to DNA is also demonstrated.
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影响因子:
14.9
作者:
Guilliam TA;Bailey LJ;Brissett NC;Doherty AJ
通讯作者:
Doherty AJ
影响因子:
16
作者:
Bianchi, Julie;Rudd, Sean G.;Jozwiakowski, Stanislaw K.;Bailey, Laura J.;Soura, Violetta;Taylor, Elaine;Stevanovic, Irena;Green, Andrew J.;Stracker, Travis H.;Lindsay, Howard D.;Doherty, Aidan J.
通讯作者:
Doherty, Aidan J.
影响因子:
16.8
作者:
Mouron, Silvana;Rodriguez-Acebes, Sara;Mendez, Juan
通讯作者:
Mendez, Juan
影响因子:
4.8
作者:
Baranovskiy, Andrey G.;Zhang, Yinbo;Tahirov, Tahir H.
通讯作者:
Tahirov, Tahir H.
影响因子:
16
作者:
García-Gómez S;Reyes A;Martínez-Jiménez MI;Chocrón ES;Mourón S;Terrados G;Powell C;Salido E;Méndez J;Holt IJ;Blanco L
通讯作者:
Blanco L