The abstract is read at the publisher; the summary is JClub's.
CRISPR immunity in Pseudomonas aeruginosa is not universally beneficial against virulent phages, with fitness effects varying strongly and predictably across a diverse phage panel.
- Why it matters: The selective pressures shaping which bacterial genomes encode CRISPR-Cas remain unclear, and how natural virulent phages drive CRISPR immunity has rarely been tested experimentally.
- What they did: Using a panel of genetically and functionally diverse virulent phages, the study measured CRISPR immunity fitness effects and tested how they relate to spacer matching, protective nuclear shells, and the probability of receptor-based resistance via spontaneous mutation.
- The result: CRISPR immunity’s fitness effect negatively associated with evolving receptor-based resistance probability, and resistance mutation supply differed between closely related lipopolysaccharide-binding phages, linked to C-terminus tail fibre variation.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.