Unraveling Gardnerella vaginalis Surface Proteins Using Cell Shaving Proteomics



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Marín, Elvira and Haesaert, Annelies and Padilla, Laura and Adán, Jaume and Hernáez Sánchez, Maria Luisa and Monteoliva Díaz, Lucía and Gil, Concha (2018) Unraveling Gardnerella vaginalis Surface Proteins Using Cell Shaving Proteomics. Frontiers in microbiology, 9 . p. 975. ISSN 1664-302X

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is one of the main etiologic agents of bacterial vaginosis (BV). This infection is responsible for a wide range of public health costs and is associated with several adverse outcomes during pregnancy. Improving our understanding of protein cell surface will assist in BV diagnosis. This study represents the first proteomic approach that has analyzed the exposed proteins on cell surface using a shaving approach. The 261 proteins identified using this approach were analyzed with bioinformatic tools to detect characteristic motifs from surface-exposed proteins, such as signal peptides (36 proteins), lipobox domains (17 proteins), LPXTG motifs (5 proteins) and transmembrane alpha-helices (66 proteins). One third of the identified proteins were found to have at least one typical motif of surface-exposed proteins. Furthermore, the subcellular location was examined using two predictors (PSORT and Gpos-mPLoc). These bioinformatic tools classified 17% of the identified proteins as surface-associated proteins. Interestingly, we identified 13 members of the ATP-binding cassette (ABC) superfamily, which were mainly involved in the translocation of various substrates across membranes. To validate the location of the surface-exposed proteins, an immunofluorescence assay with antibodies against GroEL was performed to reveal the extracellular location of the moonlighting GroEL. In addition, monoclonal antibodies (mAb) against Cna protein were produced and used to validate the location of Cna on the surface of the . These high affinity anti-Cna mAb represent a useful tool for the study of this pathogenic microorganism and the BV.

Item Type:Article
Uncontrolled Keywords:Gardnerella vaginalis, Cell shaving, Surface proteins, ABC-transporters, Trypsin digestion, GroEL, Cna
Subjects:Medical sciences > Medicine > Communicable diseases
Medical sciences > Medicine > Gynecology and Obstetrics
Medical sciences > Pharmacy > Cytology
Medical sciences > Pharmacy > Microbiology
ID Code:55665
Deposited On:11 Jun 2019 11:01
Last Modified:17 Jun 2019 11:28

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