The opportunistic marine pathogen Vibrio parahaemolyticus becomes virulent by acquiring a plasmid that expresses a deadly toxin

Chung Te Lee, I. Tung Chen, Yi Ting Yang, Tzu Ping Ko, Yun Tzu Huang, Jiun Yan Huang, Ming Fen Huang, Shin Jen Lin, Chien Yu Chen, Shih Shuen Lin, Donald V. Lightner, Han Ching Wang, Andrew H J Wang, Hao Ching Wang, Lien I. Hor, Chu Fang Lo

研究成果: 雜誌貢獻文章

201 引文 斯高帕斯(Scopus)

摘要

Acute hepatopancreatic necrosis disease (AHPND) is a severe, newly emergent penaeid shrimp disease caused by Vibrio parahaemolyticus that has already led to tremendous losses in the cultured shrimp industry. Until now, its disease-causing mechanism has remained unclear. Here we show that an AHPND-causing strain of V. parahaemolyticus contains a 70-kbp plasmid (pVA1) with a postsegregational killing system, and that the ability to cause disease is abolished by the natural absence or experimental deletion of the plasmid-encoded homologs of the Photorhabdus insect-related (Pir) toxins PirA and PirB. We determined the crystal structure of the V. parahaemolyticus PirA and PirB (PirAvp and PirBvp) proteins and found that the overall structural topology of PirAvp/PirBvp is very similar to that of the Bacillus Cry insecticidal toxin-like proteins, despite the low sequence identity (vp heterodimer might emulate the functional domains of the Cry protein, and in particular its poreforming activity. The gene organization of pVA1 further suggested that pirABvp may be lost or acquired by horizontal gene transfer via transposition or homologous recombination.
原文英語
頁(從 - 到)10798-10803
頁數6
期刊Proceedings of the National Academy of Sciences of the United States of America
112
發行號34
DOIs
出版狀態已發佈 - 八月 25 2015

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    Lee, C. T., Chen, I. T., Yang, Y. T., Ko, T. P., Huang, Y. T., Huang, J. Y., Huang, M. F., Lin, S. J., Chen, C. Y., Lin, S. S., Lightner, D. V., Wang, H. C., Wang, A. H. J., Wang, H. C., Hor, L. I., & Lo, C. F. (2015). The opportunistic marine pathogen Vibrio parahaemolyticus becomes virulent by acquiring a plasmid that expresses a deadly toxin. Proceedings of the National Academy of Sciences of the United States of America, 112(34), 10798-10803. https://doi.org/10.1073/pnas.1503129112