How the innate immune system tailors specific responses to diverse microbial infections is not well understood. Cells use a limited number of host receptors and signaling pathways to both… (More)
The origin recognition complex (ORC) is a six protein assembly that binds S. cerevisiae origins of replication and directs DNA replication throughout the genome and transcriptional silencing at the… (More)
Expression of the yeast transcription factor Hac1p, which controls the unfolded protein response, is regulated posttranscriptionally. Hac1p is only produced when an intron at the 3' end of its mRNA… (More)
Nonconventional splicing of the gene encoding the Hac1p transcription activator regulates the unfolded protein response (UPR) in Saccharomyces cerevisiae. This simple on/off switch contrasts with a… (More)
Adaptive immune responses require clonal expansion and differentiation of naive T cells into cytokine-secreting effector cells. After priming via signals through the T cell receptor, naive T helper… (More)
Listeriolysin O (LLO) is a pore-forming toxin that mediates phagosomal escape and cell-to-cell spread of the intracellular pathogen Listeria monocytogenes. In order to identify factors that control… (More)
Many pathogens regulate or modify their immune-stimulating ligands to avoid detection by their infected hosts. Listeria monocytogenes, a facultative intracellular bacterial pathogen, interacts with… (More)
Mammalian bile has potent anti-microbial activity, yet bacterial pathogens of the gastrointestinal tract and hepatobiliary system nonetheless persist and replicate within bile-rich environments.… (More)