Intra-species bacterial quorum sensing studied at single cell level in a double droplet trapping system.

Intra-species bacterial quorum sensing studied at single cell level in a double droplet trapping system.
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在双液滴诱捕系统中,在单细胞水平上研究了种类的细菌群体传感。

DOI:
10.3390/ijms140510570
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发表时间:
2013-05-21
影响因子:
5.6
通讯作者:
Abell C
Abell C
中科院分区:
生物学2区
文献类型:
--
作者:
Bai Y;Patil SN;Bowden SD;Poulter S;Pan J;Salmond GP;Welch M;Huck WT;Abell C

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在本文中,我们利用双液滴捕获系统在单细胞水平上研究了种内细菌的群体感应。将经过转化以表达群体感应受体蛋白LasR的大肠杆菌包裹在微滴中,这些微滴与含有自诱导物N - (3 - 氧代十二烷酰) - L - 高丝氨酸内酯(OdDHL)的微滴相邻放置。通过监测来自LasR依赖型启动子的绿色荧光蛋白(GFP)的表达,来测量OdDHL通过液滴界面扩散对LasR蛋白的功能性激活。发现OdDHL存在一个阈值浓度,可诱导大肠杆菌产生与群体感应相关的GFP。此外,我们还证明,当相邻液滴中含有单个经OdDHL合成酶基因LasI转化的大肠杆菌时,也会启动GFP表达的LasR依赖型激活,这代表了两个液滴之间的一个简单群体感应回路。
In this paper, we investigated the intra-species bacterial quorum sensing at the single cell level using a double droplet trapping system. Escherichia coli transformed to express the quorum sensing receptor protein, LasR, were encapsulated in microdroplets that were positioned adjacent to microdroplets containing the autoinducer, N-(3-oxododecanoyl)- l-homoserine lactone (OdDHL). Functional activation of the LasR protein by diffusion of the OdDHL across the droplet interface was measured by monitoring the expression of green fluorescent protein (GFP) from a LasR-dependent promoter. A threshold concentration of OdDHL was found to induce production of quorum-sensing associated GFP by E. coli. Additionally, we demonstrated that LasR-dependent activation of GFP expression was also initiated when the adjacent droplets contained single E. coli transformed with the OdDHL synthase gene, LasI, representing a simple quorum sensing circuit between two droplets.
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