Off-campus ETSU users: To download "Campus Only" theses, please use the following link to log in to our proxy server with your ETSU username and password.
Non-ETSU users: Please talk to your librarian about requesting this thesis through interlibrary loan.
Degree Name
MS (Master of Science)
Program
Biology
Date of Award
8-2018
Committee Chair or Co-Chairs
Chris L. Pritchett
Committee Members
Bert Lampson, Mohamed Elgazzar
Abstract
Pseudomonas aeruginosa is a central nosocomial pathogen that can infect any tissue in the human body. A two-component system in P. aeruginosa that regulates many virulence factors is the AlgZ/R system. A previously unidentified regulator of algZ, that does not affect algR, has been identified via transposon mutagenesis, ‘PA2771’. The mechanism of regulation has not been previously studied, and novel evidence of PA2771 functioning as a diguanyalate cyclase was observed. When PA2771 is active, cyclic di-GMP levels are high, promoting the upregulation of the fimU operon and Type VI pili. In the PA2771 mutant, an upregulation in the expression of the flagellar genes and swarming phenotype was observed, and restored via complementation. PA2771's function in regulating algZ expression, is likely indirect and alters virulence gene regulation and phenotypic outputs in P. aeruginosa in the switch between twitching and swimming motility, and appears to be specific to PA2771.
Document Type
Thesis - restricted
Recommended Citation
Hughes, Abigail, "PA2771 Affects algZ expression and AlgZ/R Phenotypic Outputs in Pseudomonas aeruginosa" (2018). Electronic Theses and Dissertations. Paper 3462. https://dc.etsu.edu/etd/3462
Copyright
Copyright by the authors.