DOI: https://doi.org/10.15368/theses.2015.36
Available at: https://digitalcommons.calpoly.edu/theses/1443
Date of Award
4-2015
Degree Name
MS in Biological Sciences
Department/Program
Biological Sciences
Advisor
Pat Fidopiastis
Abstract
The primary contributor to Vibrio fischeri aminopeptidase activity is aminopeptidase N, PepN. Colonization assays revealed the pepN mutant strain to be deficient at forming dense aggregates and populating the host’s light organ compared to wildtype within the first 12 hours of colonization; however the mutant competed normally at 24 hours. To address the role of PepN in colonization initiation and establish additional phenotypes for the pepN mutant strain, stress response and other physiological assays were employed. Marked differences were found between pepN mutant and wildtype strain in response to salinity, acidity, and antibiotic tolerance. This study has provided a foundation for future work on identifying a putative role for V. fischeri PepN in regulating stress response.
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Bacteriology Commons, Environmental Microbiology and Microbial Ecology Commons, Microbial Physiology Commons, Organismal Biological Physiology Commons, Other Microbiology Commons