A Mutation in DNA Polymerase α Rescues WEE1(KO) Sensitivity to HU.

A Mutation in DNA Polymerase α Rescues WEE1(KO) Sensitivity to HU.
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DOI:
10.3390/ijms22179409
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发表时间:
2021-08-30
影响因子:
5.6
通讯作者:
De Veylder L
De Veylder L
中科院分区:
生物学2区
文献类型:
--
作者:
Eekhout T;Pedroza-Garcia JA;Kalhorzadeh P;De Jaeger G;De Veylder L

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在DNA复制过程中,WEE 1激酶负责通过磷酸化并因此抑制细胞周期蛋白依赖性激酶(CDK)来保护基因组完整性,CDK是细胞周期的驱动力。因此,wee 1突变体植物不能正确地响应DNA复制过程中出现的问题,并对复制应激高度敏感。在这里,我们报告的polα-2突变体,在DNA聚合酶α的催化亚基突变,作为wee 1的抑制突变体的鉴定。突变的蛋白质似乎不太稳定,导致失去与其亚基的相互作用,并导致S期延长。
During DNA replication, the WEE1 kinase is responsible for safeguarding genomic integrity by phosphorylating and thus inhibiting cyclin-dependent kinases (CDKs), which are the driving force of the cell cycle. Consequentially, wee1 mutant plants fail to respond properly to problems arising during DNA replication and are hypersensitive to replication stress. Here, we report the identification of the polα-2 mutant, mutated in the catalytic subunit of DNA polymerase α, as a suppressor mutant of wee1. The mutated protein appears to be less stable, causing a loss of interaction with its subunits and resulting in a prolonged S-phase.
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