A synthetic Escherichia coli predator-prey ecosystem

被引：361

作者：

Balagadde, Frederick K. ^{[3
,4
,5
]}

Song, Hao ^{[1
,2
]}

Ozaki, Jun ^{[1
,2
]}

Collins, Cynthia H. ^{[6
]}

Barnet, Matthew ^{[6
]}

Arnold, Frances H. ^{[6
]}

Quake, Stephen R. ^{[3
,4
]}

You, Lingchong ^{[1
,2
]}

机构：

[1] Duke Univ, Dept Biomed Engn, Durham, NC 27708 USA

[2] Duke Univ, Inst Genome Sci & Policy, Durham, NC 27708 USA

[3] Stanford Univ, Dept Bioengn, Stanford, CA 94305 USA

[4] Stanford Univ, Howard Hughes Med Inst, Stanford, CA 94305 USA

[5] CALTECH, Dept Appl Phys, Pasadena, CA 91125 USA

[6] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

来源：

MOLECULAR SYSTEMS BIOLOGY | 2008年 / 4卷 / 1期

关键词：

D O I：

10.1038/msb.2008.24

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We have constructed a synthetic ecosystem consisting of two Escherichia coli populations, which communicate bi-directionally through quorum sensing and regulate each other's gene expression and survival via engineered gene circuits. Our synthetic ecosystem resembles canonical predator prey systems in terms of logic and dynamics. The predator cells kill the prey by inducing expression of a killer protein in the prey, while the prey rescue the predators by eliciting expression of an antidote protein in the predator. Extinction, coexistence and oscillatory dynamics of the predator and prey populations are possible depending on the operating conditions as experimentally validated by long-term culturing of the system in microchemostats. A simple mathematical model is developed to capture these system dynamics. Coherent interplay between experiments and mathematical analysis enables exploration of the dynamics of interacting populations in a predictable manner.

引用

页数：8

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