title: Switching control of an essential gene for reprogramming of cellular phenotypes in Escherichia coli.
abstract: Biological systems designs require various dynamic controllers capable of modulating cellular phenotypes to adapt to changing environments. Cellular phenotypes are simultaneously affected by combinations of multiple genes that are controlled by global regulators. However, it is difficult to intentionally control the expression of these global regulators dynamically because they are essential for cell survival and are involved in regulatory networks clustered in operons. Here, we designed a platform that allows dynamic modulation of the expression of an essential gene. Using this system, comprising of on/off switches that respond to an extracellular stimulus, we successfully demonstrated the switching control of the expression of fusA encoding elongation factor G (EF-G). An additional control module in this system that responds to changed external signals was shown to provide the capacity to "switch gears" and reprogram cellular phenotypes with desired timing.
authors.affiliation: School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Nam-gu, Pohang, Gyeongbuk 790-784, South Korea.
authors.forename: Byung Eun
authors.initials: BE
authors.lastname: Min
authors.forename: Sang Woo
authors.initials: SW
authors.lastname: Seo
authors.forename: Gyoo Yeol
authors.initials: GY
authors.lastname: Jung
mesh_terms: D004926:Escherichia coli / Q000235:genetics*; D029968:Escherichia coli Proteins / Q000235:genetics; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D020043:Genes, Essential; D020653:Peptide Elongation Factor G / Q000235:genetics
chemical_list: D029968:Escherichia coli Proteins; D020653:Peptide Elongation Factor G