期刊
ACS SYNTHETIC BIOLOGY
卷 9, 期 1, 页码 76-83出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssynbio.9b00338
关键词
cell-free system; gene circuit; gene oscillator; synthetic biology
资金
- Research Grants Council of Hong Kong [GRF 14303917]
- Chinese University of Hong Kong [4053280]
Herein we report a new type of artificial cells capable of long-term protein expression and regulation. We constructed the artificial cells by grafting anti-His-tag aptamer into the polymer backbone of the hydrogel particles, and then immobilizing the His-tagged proteinaceous factors of the transcription and translation system into the hydrogel particles. Long-term protein expression for at least 16 days was achieved by continuously flowing feeding buffer through the artificial cells. The effect of various metal ions on the protein expression in the artificial cells was investigated. Utilizing the lac operator-repressor system, we could regulate the expression level of eGFP in the artificial cells by controlling the beta-D-1-thiogalatopyranoside (IPTG) concentration in the feeding buffer. The artificial cells based on the aptamer grafted hydrogel provide a useful platform for gene circuit engineering, metabolic engineering, drug delivery, and biosensors.
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