Abstract
Green algae, Chlamydomonas reinhardtii, with low cultivation cost, absence of endotoxins and insusceptibility to human pathogens is emerging as a potential system for the future production of recombinant proteins. The recent development of molecular tools enabling recombinant protein expression in algae chloroplast has provided new research and advance opportunities for developing low-cost therapeutic proteins. In the present study, algae chloroplast expression system was evaluated for the recombinant production of an anti-cancerous therapeutic protein, Interleukin 29 (IL29). The IL29 gene was cloned into algae chloroplast expression vector (pSRSapI). After the transformation, the positive clones were screened for homoplasmy and the presence of the IL29 gene by spot test and PCR analysis, respectively. The expressed SDS-PAGE and western blotting assay characterized IL-29. The algae expressed IL-29 was biologically active in an anti-proliferating bioassay using HepG2 cells. The results suggest that the Chlamydomonas reinhardtii expression system is convenient, low-cost, eco-friendly, and safe to express IL29.
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