1. Spy&IAC enables specific capture of SpyTagged proteins for rapid assembly of plug-and-display nanoparticle vaccines.
- Author
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Chen, Yilan, Ding, Peiyang, Li, Minghui, Liu, Siyuan, Chang, Zejie, Ren, Dongna, Li, Ruiqi, Zhang, Ning, Sun, Xueke, and Zhang, Gaiping
- Subjects
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CHEMICAL purification , *PORCINE epidemic diarrhea virus , *NANOPARTICLES , *IMMUNOAFFINITY chromatography , *ESCHERICHIA coli - Abstract
From modular vaccine production to protein assembly on nanoparticles, the SpyCatcher/SpyTag system provides a convenient plug-and-display procedure. Here, we established a general-purpose immunoaffinity chromatography (IAC) method for SpyTagged proteins (Spy&IAC). SpyTags are displayed on the surface of nanoparticles to induce high-affinity monoclonal antibodies, allowing the specific capture of the target protein. Taking the key core antigenic regions of two coronaviruses that are currently more threatened in the field of human and animal diseases, the nucleocapsid (N) protein of SARS-CoV-2 and the COE protein of porcine epidemic diarrhea virus (PEDV) as model proteins, a purification model with SpyTag at the N-terminal or C-terminal expressed in E. coli or mammalian cells was constructed. After the efficient elution of Spy&IAC, the final yield of several proteins is about 3.5–15 mg/L culture, and the protein purity is above 90 %. Purification also preserves the assembly function and immunogenicity of the protein to support subsequent modular assembly and immunization programs. This strategy provides a general tool for the efficient purification of SpyTagged proteins from different expression sources and different tag positions, enabling the production of modular vaccines at lower cost and in a shorter time, which will prepare the public health field for potential pandemic threats. [Display omitted] • The high-affinity monoclonal antibody was prepared by the multivalent display of nanoparticles. • An immunoaffinity chromatography method was established for the first time for the purification of SpyTagged proteins. • The assembly function and immunogenicity of elution SpyTagged protein were retained. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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