PrimPol is required for the maintenance of efficient nuclear and mitochondrial DNA replication in human cells
PrimPol is required for the maintenance of efficient nuclear and mitochondrial DNA replication in human cells
复制标题
PrimPol 是维持人类细胞中有效的核和线粒体 DNA 复制所必需的
DOI:
10.1101/501304
复制
发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Bailey L
中科院分区:
文献类型:
--
作者:
Bailey L
Eukaryotic Primase-Polymerase (PrimPol) is an enzyme that maintains efficient DNA duplication by repriming replication restart downstream of replicase stalling lesions and structures. To elucidate the cellular requirements for PrimPol in human cells, we generated PrimPol-deleted cell lines and show that it plays key roles in maintaining active replication in both the nucleus and mitochondrion, even in the absence of exogenous damage. Human cells lacking PrimPol exhibit delayed recovery after UV-C damage and increased mutation frequency, micronuclei and sister chromatin exchanges but are not sensitive to genotoxins. PrimPol is also required during mitochondrial replication, with PrimPol-deficient cells having increased mtDNA copy number but displaying a significant decrease in replication. Deletion of PrimPol in XPV cells, lacking functional polymerase Eta, causes an increase in DNA damage sensitivity and pronounced fork stalling after UV-C treatment. We show that, unlike canonical TLS polymerases, PrimPol is important for allowing active replication to proceed, even in the absence of exogenous damage, thus preventing the accumulation of excessive fork stalling and genetic mutations. Together, these findings highlight the importance of PrimPol for maintaining efficient DNA replication in unperturbed cells and its complementary roles, with Pol Eta, in damage tolerance in human cells.
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DOI:
10.1016/j.bbadis.2015.05.016
发表时间:
2015-09
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Shokolenko IN;Alexeyev MF
通讯作者:
Alexeyev MF
DOI:
10.6084/m9.figshare.1627932
发表时间:
2016
期刊:
--
影响因子:
--
作者:
Bailey L
通讯作者:
Bailey L
DOI:
--
发表时间:
2017
期刊:
Frontiers in Bioscience
影响因子:
--
作者:
Alexis Stein;E. Sia
通讯作者:
E. Sia
DOI:
10.1007/978-1-59745-521-3_2
发表时间:
2009-01-01
期刊:
MITOCHONDRIAL DNA: METHODS AND PROTOCOLS
影响因子:
--
作者:
Reyes, Aurelio;Yasukawa, Takehiro;Holt, Ian J.
通讯作者:
Holt, Ian J.
影响因子:
3.5
作者:
Yang,JL;Maher,VM;McCormick,JJ
通讯作者:
McCormick,JJ