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Utilizzando il Overlay saggio misurare Qualitativamente produzione batterica di sensibilità e di pneumococcico batteriocine
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Inmunología y contagio
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JoVE Revista Inmunología y contagio
Using the Overlay Assay to Qualitatively Measure Bacterial Production of and Sensitivity to Pneumococcal Bacteriocins
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Utilizzando il Overlay saggio misurare Qualitativamente produzione batterica di sensibilità e di pneumococcico batteriocine

13,209 Views

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06:05 min

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September 30, 2014

DOI:

10.3791/51876-v

DOI:
10.3791/51876-v

•

06:05 min
September 30, 2014

•

4 Views
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1Microbiology and Immunology,University of Michigan, 2Pediatrics and Communicable Diseases,University of Michigan

Summary

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Competition in Streptococcus pneumoniae is mediated by bacteriocins, small antimicrobial peptides with inhibitory activity towards pneumococcus and other related species.  Here we describe an optimized bacterial overlay assay that allows for the characterization of bacteriocin activity and inhibitory spectrum, bacteriocin-specific immunity, and detection of secreted quorum sensing peptides.

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Overlay AssayBacterial ProductionPneumococcal BacteriocinsStreptococcus PneumoniaeBacteriocin-like Peptide (blp) LocusBacteriocin Immunity Region (BIR)Bacteriocin-mediated CompetitionQuorum Sensing PeptidesLacZ-reporter Strains

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Maricic, N., Dawid, S. Using the Overlay Assay to Qualitatively Measure Bacterial Production of and Sensitivity to Pneumococcal Bacteriocins. J. Vis. Exp. (91), e51876, doi:10.3791/51876 (2014).

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