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Author:
Date:
2020-03-05
[Abstract] Many bacteria take part in self recognition and kin discrimination behavior using contact-dependent effectors. Understanding the effects these effectors cause is important to explain bacterial community formation and population dynamics. Typically, kin discrimination effectors are toxins that kill target cells; their effect is therefore obvious and easily measurable. However, many self-recognition effectors, such as the Proteus mirabilis Ids system, are non-lethal and do not cause obvious physiological changes in target cells. Previously, experimental techniques to probe cells experiencing non-lethal kin recognition have been limited. Here we describe a technique to reliably isolate cells deemed self and non-self through Ids self-recognition for downstream phenotypic analysis. ...
[摘要] [摘要] 许多细菌使用接触依赖性效应子参与自我识别和亲属歧视行为。了解这些效应子引起的作用对于解释细菌群落形成和种群动态很重要。通常，亲属歧视效应子是杀死靶细胞的毒素；因此，它们的效果是显而易见的，并且易于测量。但是，许多自我识别效应器，例如变形杆菌（Proteus mirabilis） Ids系统是非致命性的，不会在靶细胞中引起明显的生理变化。以前，探测经历非致命亲属识别的细胞的实验技术受到限制。在这里，我们描述了一种技术，该技术可通过Ids自我识别可靠地分离被视为自身和非自身的细胞，以进行下游表型分析。将荧光标记的自我识别突变体的液体培养物混合在一起，并接种在群体允许的琼脂上。收获混合群，并通过荧光激活细胞分选术（FACS）分离每个菌株。在平板读取器上测量每种菌株的生长速率。该协议适用于其他细菌物种。我们简要描述了如何将分类的颗粒用于其他分析，如RNA-Seq文库制备。
[背景和 d] 许多生物的进化适应社区生活。整个大自然中存在的一种常见机制是亲属歧视：对近亲的优先对待和对非亲属的阻碍（Smith，1964）。细菌亲属歧视的研究充分的例子包括接触依赖性抑制（CDI）（Aoki 等，2009; Garcia 等，2016）和通过IV型和VI型分泌系统进行毒素转移（Brunet 等，2013; Souza ...
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