A quantitative proteomic screen of the Campylobacter jejuni flagellar-dependent secretome.
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Date
2017-01-30ICR Author
Author
Scanlan, E
Yu, L
Maskell, D
Choudhary, J
Grant, A
Type
Journal Article
Metadata
Show full item recordAbstract
UNLABELLED: Campylobacter jejuni is the leading cause of bacterial gastroenteritis in the world. A number of factors are believed to contribute to the ability of C. jejuni to cause disease within the human host including the secretion of non-flagellar proteins via the flagellar type III secretion system (FT3SS). Here for the first time we have utilised quantitative proteomics using stable isotope labelling by amino acids in cell culture (SILAC), and label-free liquid chromatography-mass spectrometry (LC/MS), to compare supernatant samples from C. jejuni M1 wild type and flagella-deficient (flgG mutant) strains to identify putative novel proteins secreted via the FT3SS. Genes encoding proteins that were candidates for flagellar secretion, derived from the LC/MS and SILAC datasets, were deleted. Infection of human CACO-2 tissue culture cells using these mutants resulted in the identification of novel genes required for interactions with these cells. This work has shown for the first time that both CJM1_0791 and CJM1_0395 are dependent on the flagellum for their presence in supernatants from C. jejuni stains M1 and 81-176. BIOLOGICAL SIGNIFICANCE: This study provides the most complete description of the Campylobac er jejuni secretome to date. SILAC and label-free proteomics comparing mutants with or without flagella have resulted in the identification of two C. jejuni proteins that are dependent on flagella for their export from the bacterial cell.
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Subject
Caco-2 Cells
Flagella
Humans
Campylobacter jejuni
Gastroenteritis
Bacterial Proteins
Chromatography, Liquid
Isotope Labeling
Proteomics
Tandem Mass Spectrometry
Bacterial Secretion Systems
Type III Secretion Systems
Language
eng
Date accepted
2016-11-14
License start date
2017-01
Citation
Journal of proteomics, 2017, 152 pp. 181 - 187
Publisher
ELSEVIER SCIENCE BV