All Publications

  • Activity-based protein profiling in bacteria: Applications for identification of therapeutic targets and characterization of microbial communities. Current opinion in chemical biology Keller, L. J., Babin, B. M., Lakemeyer, M., Bogyo, M. 2019; 54: 45–53


    Activity-based protein profiling (ABPP) is a robust chemoproteomic technique that uses activity-based probes to globally measure endogenous enzymatic activity in complex proteomes. It has been utilized extensively to characterize human disease states and identify druggable targets in diverse disease conditions. ABPP has also recently found applications in microbiology. This includes using activity-based probes (ABPs) for functional studies of pathogenic bacteria as well as complex communities within a microbiome. This review will focus on recent advances in the use of ABPs to profile enzyme activity in disease models, screen for selective inhibitors of key enzymes, and develop imaging tools to better understand the host-bacterial interface.

    View details for DOI 10.1016/j.cbpa.2019.10.007

    View details for PubMedID 31835131

  • Fluorescent Triazole Urea Activity-Based Probes for the Single-Cell Phenotypic Characterization of Staphylococcus aureus. Angewandte Chemie (International ed. in English) Chen, L. n., Keller, L. J., Cordasco, E. n., Bogyo, M. n., Lentz, C. S. 2019; 58 (17): 5643–47


    Phenotypically distinct cellular (sub)populations are clinically relevant for the virulence and antibiotic resistance of a bacterial pathogen, but functionally different cells are usually indistinguishable from each other. Herein, we introduce fluorescent activity-based probes as chemical tools for the single-cell phenotypic characterization of enzyme activity levels in Staphylococcus aureus. We screened a 1,2,3-triazole urea library to identify selective inhibitors of fluorophosphonate-binding serine hydrolases and lipases in S. aureus and synthesized target-selective activity-based probes. Molecular imaging and activity-based protein profiling studies with these probes revealed a dynamic network within this enzyme family involving compensatory regulation of specific family members and exposed single-cell phenotypic heterogeneity. We propose the labeling of enzymatic activities by chemical probes as a generalizable method for the phenotyping of bacterial cells at the population and single-cell level.

    View details for PubMedID 30768830