Project description:Comparison of Campylobacter proteome in MH media with and without deoxycholic acid, in presence of FBS or after being exposed to INT 407 and Caco2 intestinal epithelial cells.
Project description:Many pathogenic bacteria of the family Enterobacteriaceae use type III secretion systems to inject virulence proteins, termed "effectors," into the host cell cytosol. Although host-cellular activities of several effectors have been demonstrated, the function and host-targeted pathways of most of the effectors identified to date are largely undetermined. To gain insight into host proteins targeted by bacterial effectors, we performed coaffinity purification of host proteins from cell lysates using recombinant effectors from the Enterobacteriaceae intracellular pathogens Salmonella enterica serovar Typhimurium and Citrobacter rodentium. We identified 54 high-confidence host interactors for the Salmonella effectors GogA, GtgA, GtgE, SpvC, SrfH, SseL, SspH1, and SssB collectively and 21 interactors for the Citrobacter effectors EspT, NleA, NleG1, and NleK. We biochemically validated the interaction between the SrfH Salmonella protein and the extracellular signal-regulated kinase 2 (ERK2) host protein kinase, which revealed a role for this effector in regulating phosphorylation levels of this enzyme, which plays a central role in signal transduction. IMPORTANCE During infection, pathogenic bacteria face an adverse environment of factors driven by both cellular and humoral defense mechanisms. To help evade the immune response and ultimately proliferate inside the host, many bacteria evolved specialized secretion systems to deliver effector proteins directly into host cells. Translocated effector proteins function to subvert host defense mechanisms. Numerous pathogenic bacteria use a specialized secretion system called type III secretion to deliver effectors into the host cell cytosol. Here, we identified 75 new host targets of Salmonella and Citrobacter effectors, which will help elucidate their mechanisms of action.
Project description:Utilized sensitive, high throughput multiplexed ion mobility-mass spectrometry (IM-MS) to characterize the serum proteome of tuberculosis patients prior to and at 8 weeks of antibiotic treatment. Goal is to identify a serum protein signature indicative of treatment effect.
Project description:Micromonas implements a sustained non-photochemical quenching response to phosphate limitation, driven by light harvesting family protein LHCSR. This protein, allows stable growth under P-limitation and increased growth without major LCH adjustment as phosphate becomes more available. Proteomics results show this alga integrates unique strategies to optimize growth under dynamic ocean nutrient conditions.
Project description:Proteomic data from mouse lung; Treated with wild-type and mutant H7N9 and mockulum; Time points 1, 2, 4 & 7 days; 5 biological replicates
Project description:Elucidating the metabolome of the filamentous fungi Neurospora crassa to better understand the link between the circadian clock and metabolism; specifically the role that the clock plays in regulating cellulase production.