Intracellular Selection of Theophylline-Sensitive Hammerhead Aptazyme
Hammerhead ribozyme-based aptazyme (HHAz), inheriting the advantages of small size and high efficiency from the RNA-cleaving ribozyme and the specific recognition ability of aptamers to specific targets, exhibits the huge potential to be a transgene expression regulator. Herein, we report a selectio...
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| Veröffentlicht in: | Molecular therapy. Nucleic acids 2020-06, Vol.20, p.400-408 |
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| creator | Pu, Qinlin Zhou, Shan Huang, Xin Yuan, Yi Du, Feng Dong, Juan Chen, Gangyi Cui, Xin Tang, Zhuo |
| description | Hammerhead ribozyme-based aptazyme (HHAz), inheriting the advantages of small size and high efficiency from the RNA-cleaving ribozyme and the specific recognition ability of aptamers to specific targets, exhibits the huge potential to be a transgene expression regulator. Herein, we report a selection strategy for HHAz by using a toxin protein IbsC as the reporter to offer a positive phenotype, thus realizing an easy-operating, time- and labor-saving selection of HHAz variants with desired properties. Based on this strategy, we obtained a new HHAz (TAP-1), which could react sensitively toward the extracellular regulatory molecule, theophylline, both in prokaryotic and eukaryotic systems. With fluorescent protein reporter, the intracellular switching efficiencies of TAP-1 and other reported theophylline-dependent HHAzs has been quantitatively evaluated, showing that TAP-1 not only exhibits the best downregulating ability at high concentration of theophylline but also maintains high activity with 0.1 mM theophylline, which is a safe concentration in the human body.
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| doi_str_mv | 10.1016/j.omtn.2020.03.001 |
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With fluorescent protein reporter, the intracellular switching efficiencies of TAP-1 and other reported theophylline-dependent HHAzs has been quantitatively evaluated, showing that TAP-1 not only exhibits the best downregulating ability at high concentration of theophylline but also maintains high activity with 0.1 mM theophylline, which is a safe concentration in the human body.
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| subjects | Life Sciences & Biomedicine Medicine, Research & Experimental Research & Experimental Medicine Science & Technology |
| title | Intracellular Selection of Theophylline-Sensitive Hammerhead Aptazyme |
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