The Department of Biology Seminar continues this week. Location:Room 320 E.E Just Hall. Time: 12:10-1
Presenter: Selina Anosike
Title: Comparative Efficacy of Bacteriocinogenic Lactobacillus and Lactococcus spp Isolated from Cheese and Yogurt.
Abstract:In our lab we previously identified lactic acid bacteria (LAB) isolates from commercial yoghurt and cheese that exhibited broad-spectrum activity against several food spoilage and pathogenic bacteria such as Acinectobacter baumannii, Escherichia coli 0157:H7, Pseudomonas aeruginosa, Salmonella typhimurium, Proteus mirabilis, Enterobacter aerogenes, Proteus vulgaris, Klebsiella pneumoniae, Enterobacter cloacae, Streptococcus saprophyticus, Serratia marcescens, Micrococcus luteus and Staphylococcus aureus. For my research we compare the bacteriocinogenic activity of these LAB isolates which comprises of Lactococcus lactis subsp.cremoris, L. rhamnosus, L. paracasei subsp. tolerans, L. cremoris and L. parafarraginis. The LAB isolates may be novel strains with probiotic and biopreservative potential. Effort is underway to purify and characterize the bacteriocin(s).
Presenter: Jalisa Taylor
Title: Nitric Oxide dependent regulation of small RNAs involved in the Envelope Stress Response in Escherichia coli
Abstract: The Thompson laboratory focuses on nitric oxide and envelope stress in bacteria. Bacteria are exposed to many environmental and nutritional stresses in their quest to adapt and thrive in changing environments. Small RNA regulation under different physiological changes are the main-focus of my research project. The σE response to physiological stresses, is critical for promoting homeostasis in response to environmental changes that may occur resulting from abberent biogenesis of outer membrane proteins. The σE response includes the transcription of three small RNA molecules: RybB, MicA, and MicL. We have preliminary unpublished work in our lab suggests that two of these small RNAs are also co-regulated by the nitric oxide sensing transcriptional regulator NsrR. However, it is unknown if NsrR is also regulating MicL. Therefore, my work in Dr. Thompson’s laboratory, will bring light to the regulation of small RNA MicL by NsrR.