由菌素P22在Salmonella的通用转导中使用的伪pac位点序列
Jessie L Maier1, Craig Gin2, Ben Callahan2
1Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC.
bioRxiv : the preprint server for biology
|April 8, 2024
概括
研究人员在沙门氏菌细菌中确定了特定的DNA序列,称为伪PAC位,这些DNA序列会导致菌体P22的错误基因转移. 这一发现有助于预测和控制细菌系统中的水平基因转移.
科学领域:
- 微生物学 微生物学
- 遗传学 遗传学 是一个
- 生物信息学是一种生物信息学.
背景情况:
- 沙门氏菌 (Salmonella enterica Serovar Typhimurium) 和菌体P22是通过通用转导进行水平基因转移的模型.
- 一般化转导涉及菌体DNA包装机器识别PAC位点,但宿主基因组中类似的伪PAC位点会导致错误的DNA包装.
研究的目的:
- 为了确定沙门氏菌中伪PAC位点的特定DNA序列.
- 为了将伪PAC位点与通用转导启动区域相关联.
主要方法:
- 利用P22测序的可视化阅读被映射到沙门氏菌基因组.
- 确定了通用转导启动的区域和潜在的伪Pac网站.
- 搜索与P22 pac部位高度相似的序列并将它们对齐.
- 开发了一种正则表达式,用于识别沙门氏菌株LT2和14028S中的伪PAC位点.
主要成果:
- 定义了通用转导启动的区域和可能的伪PAC网站.
- 在沙门氏菌LT2和14028S中成功确定了伪PAC位点序列.
- 已识别的伪PAC站点与转导启动站点的映射读取覆盖范围相对应.
结论:
- 已识别的伪PAC位点序列可以预测其他P22敏感宿主中的通用转导位置.
- 这些序列使得基因工程沙门氏菌的通用转导能够有针对性地启动.
- 生物信息学方法适用于其他菌体-宿主系统,用于伪PAC位点识别.
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