Dopamine Sensitive ELISA Assay Utilized in Recent Publication

The Eagle Bioscience’s easYmer HLA-A*01:01 MHC Tetramers Kit was highlighted in a recent publication that focused on emerging enterococcus pore-forming toxins with MHC/HLA-I as receptors. Check out the abstract and full article below.


Enterococci are a part of human microbiota and a leading cause of multidrug resistant infections. Here, we identify a family of Enterococcus pore-forming toxins (Epxs) in E. faecalis, E. faecium, and E. hirae strains isolated across the globe. Structural studies reveal that Epxs form a branch of β-barrel pore-forming toxins with a β-barrel protrusion (designated the top domain) sitting atop the cap domain. Through a genome-wide CRISPR-Cas9 screen, we identify human leukocyte antigen class I (HLA-I) complex as a receptor for two members (Epx2 and Epx3), which preferentially recognize human HLA-I and homologous MHC-I of equine, bovine, and porcine, but not murine, origin. Interferon exposure, which stimulates MHC-I expression, sensitizes human cells and intestinal organoids to Epx2 and Epx3 toxicity. Co-culture with Epx2-harboring E. faecium damages human peripheral blood mononuclear cells and intestinal organoids, and this toxicity is neutralized by an Epx2 antibody, demonstrating the toxin-mediated virulence of Epx-carrying Enterococcus.

Xiong X., Songhai T., Yang Pan., et al. Emerging enterococcus pore-forming toxins with MHC/HLA-I as receptors. Cell. (2022) vol. 185 7:1157-1171. 10.1016/j.cell.2022.02.002

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