分离漂移阻碍了多类复制品抗生素耐药性的演变
Ana Garoña1, Mario Santer1,2, Nils F Hülter1
1Institute of General Microbiology, Kiel University, Kiel, Germany.
PLoS genetics
|August 3, 2023
概括
微生物性水平显著影响抗生素耐药性. 细菌中较高的性导致抵抗等位基因的频繁丧失,阻碍它们在种群中建立.
科学领域:
- 微生物学 微生物学
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
背景情况:
- 抗生素耐药性的出现取决于耐药性等位基因的可用性和建立.
- 染色体和染色体外遗传元素都可以编码新的抗性等位基因,可能存在多个副本.
- 多聚性对抗生素耐药性出现的影响尚未得到充分理解.
研究的目的:
- 调查性水平对微生物群体中抗生素耐药性等位基的建立的影响.
- 确定分离漂移如何影响多体元素与单体元素相比,多体元素中抗性等位基因丧失的频率.
- 为了建模出多重积分,复制体拷贝数和有益等位基建立的概率之间的关系.
主要方法:
- 在选择抗生素耐药性的过程中,不断演变的细菌种群.
- 在多倍体元素与单倍体元素中比较抗性等位基因的损失频率.
- 将实验进化与数学建模相结合,分析等位基因分离和建立概率.
主要成果:
- 由于分离漂移,多体元素中的抗性等位基因比单体元素中的抗性等位基因更频繁地丢失.
- 数学建模显示与实验结果有很强的一致性,验证了对等位基因分离的理解.
- 聚化对有益等位基建立的影响在低复制体拷贝数和高拷贝数的高原中最为明显.
结论:
- 微生物群体的性水平是抗生素耐药性的出现和建立的关键因素.
- 聚体元素中的分离漂移显著影响了抗性突变的固定概率.
- 了解病原体idy对于预测和打击抗生素耐药性的传播至关重要.
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