Opposing effects of final population density and stress on Escherichia coli mutation rate.

Opposing effects of final population density and stress on Escherichia coli mutation rate.
复制标题

DOI:
10.1038/s41396-018-0237-3
复制
发表时间:
2018-12
期刊:
The ISME journal
影响因子:
--
通讯作者:
Knight CG
Knight CG
中科院分区:
其他
文献类型:
--
作者:
Krašovec R;Richards H;Gifford DR;Belavkin RV;Channon A;Aston E;McBain AJ;Knight CG

文献摘要

参考文献

相似文献

进化取决于突变。对于单个基因型,已知突变率在不同的应激源(应激诱变- sim)下增加,在高最终种群密度(密度相关突变率可塑性- damp)下减少。我们假设这两种形式的突变率可塑性会在营养梯度上产生相反的影响。在这里,我们测试了这个假设,在越来越丰富的培养基中培养大肠杆菌。我们通过SIM(依赖于容易出错的聚合酶Pol IV和Pol V)和DAMP(依赖于去除氧化G核苷酸的MutT)的相反作用来区分添加营养素的突变率增加。在中等营养水平(可支持7 × 108细胞ml - 1)下,DAMP和SIM的组合导致突变率最低。这些发现表明,生态因素——压力和人口密度——与所有进化的燃料——突变之间有着惊人的密切而微妙的关系。
Evolution depends on mutations. For an individual genotype, the rate at which mutations arise is known to increase with various stressors (stress-induced mutagenesis—SIM) and decrease at high final population density (density-associated mutation-rate plasticity—DAMP). We hypothesised that these two forms of mutation-rate plasticity would have opposing effects across a nutrient gradient. Here we test this hypothesis, culturing Escherichia coli in increasingly rich media. We distinguish an increase in mutation rate with added nutrients through SIM (dependent on error-prone polymerases Pol IV and Pol V) and an opposing effect of DAMP (dependent on MutT, which removes oxidised G nucleotides). The combination of DAMP and SIM results in a mutation rate minimum at intermediate nutrient levels (which can support 7 × 108 cells ml−1). These findings demonstrate a strikingly close and nuanced relationship of ecological factors—stress and population density—with mutation, the fuel of all evolution.
DOI: 10.1007/s00285-016-0995-3
发表时间: 2016-12
影响因子: 1.9
作者:
Belavkin, Roman V.;Channon, Alastair;Aston, Elizabeth;Aston, John;Krasovec, Rok;Knight, Christopher G.
通讯作者: Knight, Christopher G.
DOI: 10.1085/jgp.28.2.103
发表时间: 1944-01-01
期刊: JOUR GEN PHYSIOL
影响因子: --
作者:
Myers, Jack;Clark, L. B.
通讯作者: Clark, L. B.
DOI: 10.1126/science.aan0797
发表时间: 2018-03-16
期刊: SCIENCE
影响因子: 56.9
作者:
Robert, Lydia;Ollion, Jean;Elez, Marina
通讯作者: Elez, Marina
大肠杆菌K-12的构造框架,单基因敲除突变体:Keio Collection。
DOI: 10.1038/msb4100050
发表时间: 2006
影响因子: 9.9
作者:
通讯作者: --
DOI: 10.1038/nrmicro2259
发表时间: 2010-01
期刊: Nature reviews. Microbiology
影响因子: --
作者:
通讯作者: --