Bacterial transduction particles were critical to early advances in molecular biology and are currently experiencing a resurgence in interest within the diagnostic and therapeutic fields. The difficulty of developing a robust and specific transduction reagent capable of delivering a genetic payload to the diversity of strains constituting a given bacterial species or genus is a major impediment to their expanded utility as commercial products. While recent advances in engineering the reactivity of these reagents have made them more attractive for product development, considerable improvements are still needed. Here, we demonstrate a synthetic biology platform derived from bacteriophage P1 as a chassis to target transduction reagents against four clinically prevalent species within the Enterobacterales order. Bacteriophage P1 requires only a single receptor binding protein to enable attachment and injection into a target bacterium. By engineering and screening particles displaying a diverse array of chimeric receptor binding proteins, we generated a potential transduction reagent for a future rapid phenotypic carbapenem-resistant Enterobacterales diagnostic assay.
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