DNA methylation and mutator genes in Escherichia coli K-12.

DNA methylation and mutator genes in Escherichia coli K-12.
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DOI:
10.1016/j.mrrev.2010.05.001
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发表时间:
2010-10
影响因子:
5.3
通讯作者:
Marinus, Martin G.
Marinus, Martin G.
中科院分区:
医学2区
文献类型:
--
作者:
Marinus, Martin G.

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大肠杆菌的突变菌株已被用于定义染色体复制和染色体稳定性高保真的机制。复制后错配修复缺陷的突变株显示出与纠正由复制错误引起的错配的作用一致的强增变子表型。编码DNA腺嘌呤甲基转移酶的基因(dam)的失活导致与错配修复过程中DNA甲基化在链辨别中的作用一致的增变表型。本文就E.大肠杆菌中的突变体及其与错配修复和突变体表型的关系。
Mutator strains of Escherichia coli have been used to define mechanisms that account for the high fidelity of chromosome duplication and chromosome stability. Mutant strains defective in post-replicative mismatch repair display a strong mutator phenotype consistent with a role for correction of mismatches arising from replication errors. Inactivation of the gene (dam) encoding DNA adenine methyltransferase results in a mutator phenotype consistent with a role for DNA methylation in strand discrimination during mismatch repair. This review gives a personal perspective on the discovery of dam mutants in E. coli and their relationship to mismatch repair and mutator phenotypes.
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