Date of Graduation

Winter 12-13-2013

Document Type


Degree Name

Master of Science in Chemistry


College of Arts and Sciences



First Advisor

Dr. Megan E. Bolitho

Second Advisor

Dr. Lawrence Margerum

Third Advisor

Dr. Jie Jack Li


Quorum sensing (QS) is a process of coordination of bacterial gene expression in response to cell population. System two QS is regulated by the small signaling molecule autoinducer-2 (AI-2) and is implicated in the infectious behaviors of various bacterial species. AI-2 is biosynthesized from S-ribosylhomocysteine (SRH) by the enzyme LuxS and induces interspecies cell-to-cell communication. Inhibition of LuxS would therefore inhibit interspecies QS. Herein, a search for novel molecular species that will competitively bind with SRH in the LuxS binding site is performed in silico. Computational screening results are then validated in vitro using an optimized LuxS inhibition assay.