Exploring the role of the lacZ gene in regulating sphingolipid production in E. coli

Sphingolipids are complex lipids found in the cell membrane that are integral to many functions in the cell such as membrane structure, signaling, and cell-to-cell communication. However, it is not known what regulates the production of sphingolipids in Escherichia coli. For this study, the focus is to determine how sphingolipid production is regulated inside the bacteria E. coli. To do this, lacZ gene was knocked out which is required for growth on lactose, and we introduced the plasmid which has the lacZ gene under the control of the sphingolipid promoter. This will make it so that the E. coli cannot grow like they would normally in the minimal media lactose plates due to missing the benefits of lacZ. If a colony of E. coli grows within the plate, that means that there is a mutation there that has enabled the lacZ protein to be reactivated along with the sphingolipid reporter as well. This mutantstrain can then be cultured, and its genome studied to find a possible regulatory pathway for sphingolipid production, since the mutant would reactivate both the lacZ protein and the sphingolipid reporter.