Sijung Suh

Degree Type

Honors Capstone Project

Date of Submission

Spring 5-1-2007

Capstone Advisor

Anthony Garza

Honors Reader

Scott E. Erdman

Capstone Major


Capstone College

Arts and Science

Audio/Visual Component


Capstone Prize Winner


Won Capstone Funding


Honors Categories

Sciences and Engineering

Subject Categories

Biochemistry | Biochemistry, Biophysics, and Structural Biology


Pseudomonas aeruginosa mutants PA0686, PA3102, PA3103, and PA5210 carry transposon insertions in uncharacterized genes in the PA01 background. The biofilms formed by these mutants show different phenotypes than PA01, their wild-type counterpart. BLAST searches and phylogenomic mapping tools indicate that protein products of the mutated genes are involved in P. aeruginosa type-II secretion, which is linked to twitching motility. In this study, 96-well microtitre plate biofilm assays, UV/visible spectrophotometer analysis, and motility assays were used to demonstrate a link between type-II secretion, twitching motility and biofilm formation. The results show that the PA5210 mutant forms a biofilm that is less compact than the wild-type, while PA0686 forms a faint biofilm. Also, the motility assays support our hypothesis that these mutants are defective in twitching motility.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

Included in

Biochemistry Commons



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