POLE Mutation Spectra Are Shaped by the Mutant Allele Identity, Its Abundance, and Mismatch Repair Status.
POLE Mutation Spectra Are Shaped by the Mutant Allele Identity, Its Abundance, and Mismatch Repair Status.
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DOI:
10.1016/j.molcel.2020.05.012
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发表时间:
2020-06-18
期刊:
影响因子:
16
通讯作者:
Pursell ZF
中科院分区:
文献类型:
--
作者:
Hodel KP;Sun MJS;Ungerleider N;Park VS;Williams LG;Bauer DL;Immethun VE;Wang J;Suo Z;Lu H;McLachlan JB;Pursell ZF
Human tumors with exonuclease domain mutations in POLE, the gene encoding DNA polymerase ε, have incredibly high mutation burdens. These errors arise in four unique mutation signatures occurring in different relative amounts, the etiologies of which remain poorly understood. We used CRISPR/Cas9 to engineer human cell lines expressing POLE tumor variants, with and without mismatch repair (MMR). Whole exome sequencing of these cells after defined numbers of population doublings permitted analysis of nascent mutation accumulation. Unlike an exonuclease active site mutant that we previously characterized, POLE cancer mutants readily drive signature mutagenesis in the presence of functional MMR. Comparison of cell line and human patient data suggests that the relative abundance of mutation signatures partitions POLE tumors into distinct subgroups dependent on the nature of the POLE allele, its expression level and MMR status. These results suggest that different POLE mutants have previously unappreciated differences in replication fidelity and mutagenesis. Hodel et al. demonstrate that POLE cancer variants generate intense POLE hotspot error mutagenesis in human cells even in the face of functional post-replication MMR. The relative abundance of mutation signatures stratifies human POLE mutant tumors into discrete subgroups based on specific alleles and MMR status.
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影响因子:
11.2
作者:
Kane DP;Shcherbakova PV
通讯作者:
Shcherbakova PV
DOI:
10.1158/1541-7786.mcr-09-0502
发表时间:
2010-03
期刊:
Molecular cancer research : MCR
影响因子:
--
作者:
Gardner LB
通讯作者:
Gardner LB
影响因子:
64.8
作者:
通讯作者:
--
DOI:
10.3109/10409238.2011.620941
发表时间:
2011-12
影响因子:
6.5
作者:
Herr AJ;Williams LN;Preston BD
通讯作者:
Preston BD
影响因子:
4
作者:
Alexandrov, Ludmil B.;Stratton, Michael R.
通讯作者:
Stratton, Michael R.