Journal
RESEARCH IN MICROBIOLOGY
Volume 164, Issue 8, Pages 848-855Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.resmic.2013.06.008
Keywords
Outer membrane protein; beta-barrel; OmpW; Resistance to phagocytosis; Protective antigen; Iron
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Funding
- Natural Science Foundation of Zhejiang Province [Y2090396]
- Commonweal Technology Application Project Program of Zhejiang Province [2011C23067]
- NSFC project grant [31200110]
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Eight-stranded beta-barrel outer membrane proteins can confer bacterial virulence via resistance to host innate defenses. This resistance function of OmpW, which was recently identified as an eight-stranded beta-barrel protein, was investigated in this study. Our results demonstrated that upregulation of OmpW correlated with increased bacterial survival during phagocytosis. Bacterial mutants harboring a deletion of ompW exhibited a significantly increased phagocytosis rate. Both observations suggest that the OmpW protein protects bacteria against host phagocytosis. In addition, expression of ompW is regulated by iron, which implies that the resistance provided by OmpW may be an important factor in iron-related infectious diseases. Furthermore, OmpW has been identified as a protective antigen that protects mice against bacterial infection and is therefore a promising target for vaccine development against infectious diseases. (C) 2013 Institut Pasteur. Published by Elsevier Masson SAS. All rights reserved.
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