Abstract
A key enzyme for the biosynthesis and bioengineering of heparin, 3-O-sulfotransferase-1 (3-OST-1), was expressed and purified in Gram-positive Bacillus subtilis and Bacillus megaterium. Western blotting, protein sequence analysis, and enzyme activity measurement confirmed the expression. The enzymatic activity of 3-OST-1 expressed in Bacillus species were found to be similar to those found when expressed in Escherichia coli. The endotoxin level in 3-OST-1 from B. subtilis and B. megaterium were 104–105-fold lower than that of the E. coli-expressed 3-OST-1, which makes the Bacillus expression system of particular interest for the generation of pharmaceutical grade raw heparin from nonanimal sources.
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Acknowledgments
This work was supported by grants funded by the National Institutes of Health HL101721 and HL096972 (RJL), the Bioengineered Heparin Consortium, and 863 Hi-Tech Research and Development Program of the People’s Republic of China (project no. 2012AA022300). The authors would also like to thank Dr. Sui-Lam Wong (University of Calgary), Dr. Xiaozhou Zhang (Virginia Tech), and Dr. Cynthia Collins (Rensselaer Polytechnic Institute) for supplying bacterial strains and plasmids.
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Wenya Wang and Jacob A. Englaender equally contributed to this work.
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Wang, W., Englaender, J.A., Xu, P. et al. Expression of Low Endotoxin 3-O-Sulfotransferase in Bacillus subtilis and Bacillus megaterium . Appl Biochem Biotechnol 171, 954–962 (2013). https://doi.org/10.1007/s12010-013-0415-8
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DOI: https://doi.org/10.1007/s12010-013-0415-8