Polynucleotide phosphorylase of Escherichia coli is required for the establishment of bacteriophage P4 immunity.

@article{Piazza1996PolynucleotidePO,
  title={Polynucleotide phosphorylase of Escherichia coli is required for the establishment of bacteriophage P4 immunity.},
  author={Fabio Di Piazza and M V Zappone and Masatoshi Sana and Federica Briani and Gianni Deh{\`o}},
  journal={Journal of bacteriology},
  year={1996},
  volume={178 18},
  pages={
          5513-21
        }
}
Bacteriophage P4's superinfection immunity mechanism is unique among those of other known bacteriophages in several respects: (i) the P4 immunity factor is not a protein but a short, stable RNA (CI RNA); (ii) in the prophage the expression of the replication operon is prevented by premature transcription termination rather than by repression of transcription initiation; (iii) transcription termination is controlled via RNA-RNA interactions between the CI RNA and two complementary target… CONTINUE READING
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