Systematic mapping of bacteriophage gene essentiality with HIDEN-SEQ.

HIDEN-SEQ identifies essential and conditionally essential genes in bacteriophages, revealing new antiviral defense factors across diverse hosts and conditions.

• Why it matters: Understanding phage gene functions is crucial for advancing phage therapy and biotechnology, yet many phage genes remain uncharacterized, limiting progress.
• What they did: The authors developed HIDEN-SEQ, a transposon-insertion sequencing method, and applied it to model phage T4 and other phages, mapping gene essentiality and discovering new antiviral defense factors.
• The result: This approach reproduces known gene maps and uncovers novel genes involved in phage-host interactions, enabling insights into microbial ecology and enhancing phage-based applications.