Characterization of the Salmonella Typhimurium Proteome by Semi-automated Two Dimensional HPLC-Mass Spectrometry: Detection of Proteins Implicated in Multiple Antibiotic Resistance
- 8 April 2004
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of Proteome Research
- Vol. 3 (3), 595-603
- https://doi.org/10.1021/pr034129u
Abstract
The proteome of Salmonella enterica serovar Typhimurium was characterized by 2-dimensional HPLC mass spectrometry to provide a platform for subsequent proteomic investigations of low level multiple antibiotic resistance (MAR). Bacteria (2.15 ± 0.23 × 1010 cfu; mean ± s.d.) were harvested from liquid culture and proteins differentially fractionated, on the basis of solubility, into preparations representative of the cytosol, cell envelope and outer membrane proteins (OMPs). These preparations were digested by treatment with trypsin and peptides separated into fractions (n = 20) by strong cation exchange chromatography (SCX). Tryptic peptides in each SCX fraction were further separated by reversed-phase chromatography and detected by mass spectrometry. Peptides were assigned to proteins and consensus rank listings compiled using SEQUEST. A total of 816 ± 11 individual proteins were identified which included 371 ± 33, 565 ± 15 and 262 ± 5 from the cytosolic, cell envelope and OMP preparations, respectively. A significant correlation was observed (r2 = 0.62 ± 0.10; P < 0.0001) between consensus rank position for duplicate cell preparations and an average of 74 ± 5% of proteins were common to both replicates. A total of 34 outer membrane proteins were detected, 20 of these from the OMP preparation. A range of proteins (n = 20) previously associated with the mar locus in E. coli were also found including the key MAR effectors AcrA, TolC and OmpF. Keywords: Salmonella Typhimurium • proteome • OMPs • antibiotic resistance • 2-dimensional-HPLC-mass spectrometryKeywords
This publication has 14 references indexed in Scilit:
- Two-dimensional nano-liquid chromatography–mass spectrometry system for applications in proteomicsJournal of Chromatography A, 2003
- Toward a protein profile of Escherichia coli : Comparison to its transcription profileProceedings of the National Academy of Sciences, 2003
- The importance of efflux pumps in bacterial antibiotic resistanceJournal of Antimicrobial Chemotherapy, 2002
- Multidimensional peptide separations in proteomicsTrends in Biotechnology, 2002
- Evaluation of Multidimensional Chromatography Coupled with Tandem Mass Spectrometry (LC/LC−MS/MS) for Large-Scale Protein Analysis: The Yeast ProteomeJournal of Proteome Research, 2002
- Shotgun Proteomics and Biomarker DiscoveryDisease Markers, 2002
- Large-scale analysis of the yeast proteome by multidimensional protein identification technologyNature Biotechnology, 2001
- Extraction of membrane proteins by differential solubilization for separation using two‐dimensional gel electrophoresisElectrophoresis, 1998
- Overlaps and parallels in the regulation of intrinsic multiple‐antibiotic resistance in Escherichia coliMolecular Microbiology, 1996
- Characterization of the Salmonella typhimurium phoE gene and development of Salmonella-specific DNA probesGene, 1992