Abstract
Heteroscorpine-1 (HS-1) was identified as a member of the scorpine family. HS-1 shows insecticidal activities, exhibiting a low median lethal dose (LD50) in mealworm (Tenebrio molitor L.) and inhibitory activities against Bacillus subtilis, Klebsiella pneumoniae, and Pseudomonas aeruginosa. In this study, a recombinant HS-1 (rHS-1) was produced by overexpression in E. coli. A large yield of product was obtained. The structure of purified rHS-1 was confirmed through mass spectrometry. Both anti-crude venom and anti-rHS-1 antibodies specifically recognized rHS-1, suggesting its structural similarity. Reactivated rHS-1 caused roughening and blebbing of bacterial cell surfaces. It showed higher activity than that of pre-refolded protein. Antisera raised against a partially purified and mis- or unfolded peptide can inhibit relevant bioactivity.
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Acknowledgments
This work was supported by the Japan Society for the Promotion of Science (JSPS) and the TRF-CHE Research Grant for Mid-Career University Faculty; jointly funded by the Thailand Research Fund (TRF) and the Office of the Higher Education Commission (CHE), Ministry of Education, Thailand; and additionally supported by the Khon Kaen University (KKU) Research Fund, fiscal years 2006–2010. This research was also supported by a grant from the Strategic Scholarships for Frontier Research Network for the Thai Postdoctoral Programs to N.U. from CHE and Synchrotron Light Research Institute (SLRI), Thailand, grant number 2552/07. We would like to thank Prof. Yukifumi Nawa of the KKU Publication Clinic for critical reading of the manuscript.
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Uawonggul, N., Sukprasert, S., Incamnoi, P. et al. Bacterial Overexpression of Recombinant Heteroscorpine-1 (rHS-1), a Toxin from Heterometrus laoticus Scorpion Venom: Trends for Antibacterial Application and Antivenom Production. Biochem Genet 52, 459–473 (2014). https://doi.org/10.1007/s10528-014-9660-y
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DOI: https://doi.org/10.1007/s10528-014-9660-y