Abstract
In this article we report the cloning and expression of a cDNA encoding Tachypleus anti-lipopolysaccharide (LPS) factor, which is of interest for use as a potential inhibitor of the common core subunit of Gram-negative bacterial endotoxins. First, two degenerate primers were designed based on the sequence homology of anti-LPS factors purified from different species of horseshoe crab. The total RNA was extracted from amebocytes of Tachypleus tridentatus. The cDNA was then obtained by using the RT-PCR methods. Second, the cDNA of Tachypleus anti-LPS factor (TALF) was expressed in Bombyx mori larvae using baculovirus expression system, which showed a yield of up to 600 mg/L. Last, we determined the biological activity of the recombinant proteins by LPS neutralization assay and bacteriostatic assay in vitro.
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