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Protein degradation technology, which is one of the most direct and effective ways to regulate the life activities of cells, is expected to be applied to the treatment of various diseases. However, current protein degradation technologies such as some small-molecule degraders which are unable to achieve spatiotemporal regulation, making them difficult to transform into clinical applications. In this article, an upconversion optogenetic nanosystem was designed to attain accurate regulation of protein degradation. This system worked via two interconnected parts: 1) the host cell expressed light-sensitive protein that could trigger the ubiquitin-proteasome pathway upon blue-light exposure; 2) the light regulated light-sensitive protein by changing light conditions to achieve regulation of protein degradation. Experimental results based on model protein (Green Fluorescent Protein, GFP) validated that this system could fulfill protein degradation both in vitro (both Hela and 293T cells) and in vivo (by upconversion optogenetic nanosystem), and further demonstrated that we could reach spatiotemporal regulation by changing the illumination time (0-25 h) and the illumination frequency (the illuminating frequency of 0-30 s every 1 min). We further took another functional protein (The Nonstructural Protein 9, NSP9) into experiment. Results confirmed that the proliferation of porcine reproductive and respiratory syndrome virus (PRRSV) was inhibited by degrading the NSP9 in this light-induced system, and PRRSV proliferation was affected by different light conditions (illumination time varies from 0-24 h). We expected this system could provide new perspectives into spatiotemporal regulation of protein degradation and help realize the clinical application transformation for treating diseases of protein degradation technology.


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Spatiotemporal regulation of ubiquitin-mediated protein degradation via upconversion optogenetic nanosystem

Show Author's information Yafeng Hao1,§Taofeng Du2,§Gaoju Pang1Jiahua Li1Huizhuo Pan1Yingying Zhang1Lizhen Wang2Jin Chang1En-min Zhou2( )Hanjie Wang1( )
School of Life Sciences, Tianjin University, Tianjin 300072, China
Department of preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China

§ Yafeng Hao and Taofeng Du contributed equally to this work.

Abstract

Protein degradation technology, which is one of the most direct and effective ways to regulate the life activities of cells, is expected to be applied to the treatment of various diseases. However, current protein degradation technologies such as some small-molecule degraders which are unable to achieve spatiotemporal regulation, making them difficult to transform into clinical applications. In this article, an upconversion optogenetic nanosystem was designed to attain accurate regulation of protein degradation. This system worked via two interconnected parts: 1) the host cell expressed light-sensitive protein that could trigger the ubiquitin-proteasome pathway upon blue-light exposure; 2) the light regulated light-sensitive protein by changing light conditions to achieve regulation of protein degradation. Experimental results based on model protein (Green Fluorescent Protein, GFP) validated that this system could fulfill protein degradation both in vitro (both Hela and 293T cells) and in vivo (by upconversion optogenetic nanosystem), and further demonstrated that we could reach spatiotemporal regulation by changing the illumination time (0-25 h) and the illumination frequency (the illuminating frequency of 0-30 s every 1 min). We further took another functional protein (The Nonstructural Protein 9, NSP9) into experiment. Results confirmed that the proliferation of porcine reproductive and respiratory syndrome virus (PRRSV) was inhibited by degrading the NSP9 in this light-induced system, and PRRSV proliferation was affected by different light conditions (illumination time varies from 0-24 h). We expected this system could provide new perspectives into spatiotemporal regulation of protein degradation and help realize the clinical application transformation for treating diseases of protein degradation technology.

Keywords: optogenetics, protein degradation, ubiquitin-proteasome system, upconversion materials, the nonstructural protein9 (NSP9), porcine reproductive and respiratory syndrome virus (PRRSV)

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Publication history
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Acknowledgements

Publication history

Received: 28 January 2020
Revised: 17 July 2020
Accepted: 20 July 2020
Published: 14 August 2020
Issue date: December 2020

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature

Acknowledgements

This work was sponsored by the National Key Research and Development Program of China (Nos. 2019YFA0906500 and 2017YFA0205104), the National Natural Science Foundation of China (Nos. 31971300, 817719709, 51873150 and 51573128), Tianjin Natural Science Foundation (No. 19JCYBJC28800) and Young Elite Scientists Sponsorship Program by Tianjin.

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