Correlation of probioticLactobacillus salivariusgrowth phase with its cell wall-associated proteome
Autor: | Colum P. Dunne, Patricia B. Maguire, Mary Bennett, Gerald C. O'Sullivan, Achim Treumann, Richard Edwards, Fergus Shanahan, Desmond J. Fitzgerald, Peter Kelly, Bernd Thiede, J. Kevin Collins |
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Rok vydání: | 2005 |
Předmět: |
Proteome
Molecular Sequence Data Virulence medicine.disease_cause Microbiology Mass Spectrometry law.invention Probiotic Bacterial Proteins Listeria monocytogenes Cell Wall law Lactobacillus Genetics medicine Humans Amino Acid Sequence Molecular Biology Polyacrylamide gel electrophoresis biology Probiotics Lactobacillus salivarius biology.organism_classification Trypsin Biochemistry Electrophoresis Polyacrylamide Gel medicine.drug |
Zdroj: | FEMS Microbiology Letters. 252:153-159 |
ISSN: | 1574-6968 0378-1097 |
DOI: | 10.1016/j.femsle.2005.08.051 |
Popis: | Lactobacillus salivarius subsp. salivarius UCC118 is a probiotic bacterium that was originally isolated from human intestinal tissues and was subsequently shown in a pilot study to alleviate symptoms associated with mild-moderate Crohn's disease. Strain UCC118 can adhere to animal and human intestinal tissue, and to both healthy and inflamed ulcerative colitis mucosa, irrespective of location in the gut. In this study, an enzymatic technique has been combined with proteomic analysis to correlate bacterial growth phase with the presence of factors present in the cell wall of the bacterium. Using PAGE electrophoresis, it was determined that progression from lag to log to stationary growth phases in vitro correlated with increasing prominence of an 84 kD protein associated with in vitro adherence ability. Isolated proteins from the 84 kD band region were further separated by two-dimensional electrophoresis, resolving this band into 20 individual protein spots at differing isoelectric points. The protein moieties were excised, trypsin digested and subjected to tandem mass spectrometry. The observed proteins are analogous to those reported to be associated with the Listeria monocytogenes cell-wall proteome, and include DnaK, Ef-Ts and pyruvate kinase. These data suggest that at least some of the beneficial attributes of probiotic lactobacilli, and in particular this strain, may be due to nonpathogenic mimicry of pathogens and potentially be mediated through a form of attenuated virulence. |
Databáze: | OpenAIRE |
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