Abstract
Fragment E of ureB (ureBE) was cloned from a clinical isolate of Helicobacter pylori. A prokaryotic expression vector, pAMJ399, with the ureB fragment E and the Staphylococcus aureus protein A anchor fragment (spaX), was constructed. The fusion protein was expressed under the control of the P170 promoter in Lactococcus lactis. Western blot assay of lactococcal cell wall extracts with a polyclonal chicken antiserum confirmed the immunity of the expressed recombinant protein which was located on the cell surface. These results provide the first report of a surface display system in lactic acid bacteria for the delivery of oral vaccines against Helicobacter pylori.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 30300017), the Natural Science Foundation of Zhejiang Province (No. R306425), and the program for science and technology from Zhejiang Province (Nos. 2005C21043; 2007C12037).
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Song, D., Gu, Q. Surface expression of Helicobacter pylori urease subunit B gene E fragment on Lactococcus lactis by means of the cell wall anchor of Staphylococcus aureus protein A. Biotechnol Lett 31, 985–989 (2009). https://doi.org/10.1007/s10529-009-9965-9
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DOI: https://doi.org/10.1007/s10529-009-9965-9