Volume 42, Issue 10 pp. 1114-1120
Breaking Report

Encouraging Solution to the Problem of Synthesizing Protein α-Thioester

Xinliang Liu

Xinliang Liu

Center for Chemical Glycobiology, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 200240 China

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Zijun Gao

Zijun Gao

Center for Chemical Glycobiology, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 200240 China

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Jie Zhao

Jie Zhao

Center for Chemical Glycobiology, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 200240 China

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Farong Ye

Farong Ye

Center for Chemical Glycobiology, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 200240 China

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Ping Huang

Corresponding Author

Ping Huang

Center for Chemical Glycobiology, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 200240 China

E-mail: [email protected]; [email protected]Search for more papers by this author
Ping Wang

Corresponding Author

Ping Wang

Center for Chemical Glycobiology, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 200240 China

Shenzhen Research Institute of Shanghai Jiao Tong University, Shenzhen, Guangdong, 518057 China

E-mail: [email protected]; [email protected]Search for more papers by this author
First published: 05 February 2024
Citations: 2

Comprehensive Summary

Expressed protein ligation (EPL) provides a powerful tool to access large-size proteins with precise structures. Existing methods for constructing the critical protein thioester for EPL have predominantly relied on the recombinant intein fusion expressed in Escherichia coli (E. coli). Despite its powerful applications, the expression of thioester derived from eukaryotic protein in E. coli inherently suffers from its limited solubility, the inactivity of intein, premature hydrolysis and low yields. To overcome these obstacles, we present herein the facile one-flask synthesis of inaccessible protein α-thioester via a SUMO-protein-intein (SPI) sandwich model. The utility of SUMO enhances the protein fusion yield and solubility, prevents premature hydrolysis and simplifies the purification process. The inaccessible protein thioester with internal Cys residues can be readily produced and is compatible with the EPL-desulfurization protocol used to prepare complex proteins, which is otherwise difficult to obtain using traditional methods. Its utility has been highlighted through the synthesis of human granulocyte colony-stimulating factor (G-CSF). image

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