![]() ![]() ![]() Inspired by antibody specificity engineering, this approach generates deep functional diversity while minimizing disruptions to the overall tail fiber structure, resulting in synthetic “phagebodies.” We showed that mutating HRDRs yields phagebodies with altered host-ranges, and select phagebodies enable long-term suppression of bacterial growth in vitro, by preventing resistance appearance, and are functional in vivo using a murine model. Through natural evolution and structural modeling, we identified host-range-determining regions (HRDRs) in the T3 phage tail fiber protein and developed a high-throughput strategy to genetically engineer these regions through site-directed mutagenesis. However, acquisition of resistance by bacteria is a major issue in the successful development of phage therapies. ![]() The rapid emergence of antibiotic-resistant infections is prompting increased interest in phage-based antimicrobials. ![]()
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