Seminar - Stress Testing the Bacterial Cell Wall

Department of Microbiology and Immunology
presents a seminar by:
David Sychantha
Ph.D.; Postdoctoral Fellow, Department of Biochemistry and Biomedical Sciences, McMaster University
Seminar - Stress Testing the Bacterial Cell Wall


Sponsored by UBC Department of Microbiology & Immunology

Abstract: The bacterial cell wall is the essential stress-bearing layer responsible for cellular morphogenesis and integrity. Its primary component, peptidoglycan, is a dynamic heteropolymer that undergoes continual biosynthesis and remodelling during growth and division. This process is highly coordinated, and its disruption through the action of cell wall-active antibiotics results in bacterial death. Many resistance mechanisms are known to overcome cell wall-active antibiotics, including enzymatic inactivation or target modification. However, intrinsic antibiotic resistance, or tolerance, caused by genetic or biochemical adaptations is cryptic and poorly understood. Cryptic processes that confer antibiotic tolerance can be uncovered by stress testing the cell wall in genome-wide gene deletion libraries. An approach leveraging type V glycopeptide antibiotics as chemical probes will be presented to identify the mechanisms underpinning how bacteria withstand certain antibiotics. The findings of this work could guide the detection of antibiotic resistant bacteria while identifying new targets for developing antibiotic potentiators. 


This is a hybrid seminar which you can attend in person in LSC3 (Life Sciences Institute, UBC Vancouver Campus) or on Zoom. If you are joining on zoom, please use the meeting ID and passcode below: 

Join a Meeting:

Meeting ID: 91037 579420 

Passcode: 579420


Tuesday, April 18, 2023 - 12:30pm to 1:30pm

Life Sciences Centre, LSC 3
2350 Health Sciences Mall
Hosted by
Elitza Tocheva