Related Experiment Video
Updated: Jul 14, 2026

Using Synthetic Biology to Engineer Living Cells That Interface with Programmable Materials
Published on: March 9, 2017
Integration Site Library for Efficient Construction of Plasmid-Free Microbial Cell Factories in Escherichia coli
Xiaolei Wang1, Liangyu Lu1, Qiyuan Liu1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Abstract:
Enhanced production stability and efficiency along with a decrease in production costs are required to build efficient microbial cell factories. Target genes can be integrated into the genome to enhance genetic stability, reduce reliance on antibiotics, and alleviate the metabolic burden. However, selecting the optimal insertion site for the desired gene expression levels remains challenging. Therefore, 18 commonly usedEscherichia coliintegration sites were systematically characterized in this study. Promoters of different strengths were combined with integration sites, yielding a differential intensity range of up to 93-fold. This indicated the versatility and precision of this approach for controlling gene expression levels. Referring to the library, pathway genes were strategically integrated into theE. coligenome based on their respective expression levels. Genetically stable and highly efficient engineered strains that could biosynthesize arbutin and p-aminobenzoic acid were constructed.
Related Concept Videos
Microbial Classification System
Scale-Up Processes
Production of Antibiotics
Production of Pharmaceuticals
iChip

