Abstract:
:Cell free protein synthesis has become a powerful method for the high-throughput production of proteins that are difficult to express in living cells. The protein SAP2 of Fasciola hepatica (FhSAP2), which has demonstrated to be both, an excellent vaccine candidate against experimental fascioliasis and a good antigen for serodiagnosis of human chronic fascioliasis, is a typical example of a molecule that is difficult to produce. This is mainly due to its tendency to get over-expressed in inclusion bodies by prokaryotes. FhSAP2 expressed in an Escherichia coli-based expression system is poorly glycosylated, insoluble and often undergoes improper folding leading it to reduced immunogenicity. In this work, FhSAP2 was expressed in vitro using the eukaryote cell free system, TNT T7 Quick coupled transcription/translation, that has been designed for the expression of PCR-generated DNA templates. FhSAP2 was expressed in micro-volumes and purified by an affinity chromatography method, which gave a protein yield of 500 µg/ml as determined by bicinchoninic acid assay method. Circular dichroism, Western blotting and enzyme-linked immunosorbent assay analysis were used to confirm the secondary structure, purity and integrity of protein. Results demonstrate that FhSAP2 can be expressed in a cell-free system retaining its main conformational and antigenic properties. The protein purified could be used in immunization experiments and immunodiagnostic techniques.
journal_name
Mol Biol Repjournal_title
Molecular biology reportsauthors
Ramos-Benítez MJ,Lopez-Cruz LM,Aguayo V,Ruiz-Jimenez C,Espino AMdoi
10.1007/s11033-018-4251-3subject
Has Abstractpub_date
2018-10-01 00:00:00pages
1551-1556issue
5eissn
0301-4851issn
1573-4978pii
10.1007/s11033-018-4251-3journal_volume
45pub_type
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