Global proteomic profiling of native outer membrane vesicles derived from Escherichia coli - PubMed (original) (raw)
. 2007 Sep;7(17):3143-53.
doi: 10.1002/pmic.200700196.
Joo Young Bang, Gun Wook Park, Dong-Sic Choi, Ji Seoun Kang, Hyun-Jung Kim, Kyong-Su Park, Jeong-Ok Lee, Yoon-Keun Kim, Kyung-Hoon Kwon, Kwang-Pyo Kim, Yong Song Gho
Affiliations
- PMID: 17787032
- DOI: 10.1002/pmic.200700196
Global proteomic profiling of native outer membrane vesicles derived from Escherichia coli
Eun-Young Lee et al. Proteomics. 2007 Sep.
Erratum in
- Proteomics. 2007 Oct;7(20):3821
Abstract
Gram-negative bacteria constitutively secrete native outer membrane vesicles (OMVs) into the extracellular milieu. Although recent progress in this area has revealed that OMVs are essential for bacterial survival and pathogenesis, the mechanism of vesicle formation and the biological roles of OMVs have not been clearly defined. Using a proteomics approach, we identified 141 protein components of Escherichia coli-derived native OMVs with high confidence; two separate analyses yielded identifications of 104 and 117 proteins, respectively, with 80 proteins overlapping between the two trials. In the group of identified proteins, the outer membrane proteins were highly enriched, whereas inner membrane proteins were lacking, suggesting that a specific sorting mechanism for vesicular proteins exists. We also identified proteins involved in vesicle formation, the removal of toxic compounds and attacking phage, and the elimination of competing organisms, as well as those involved in facilitating the transfer of genetic material and protein to other bacteria, targeting host cells, and modulating host immune responses. This study provides a global view of native bacterial OMVs. This information will help us not only to elucidate the biogenesis and functions of OMV from nonpathogenic and pathogenic bacteria but also to develop vaccines and antibiotics effective against pathogenic strains.
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