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  • Title: Colicin Ib does not cause plasmid-promoted abortive phage infection of Escherichia coli K-12.
    Author: Boulnois GJ.
    Journal: Mol Gen Genet; 1981; 182(3):508-10. PubMed ID: 7029213.
    Abstract:
    A 2.2 kilobase (kb) fragment of ColIdrd-1 cloned in pBR325 causes phage T5 and BF23 infections of Escherichia coli K-12 to abort. This abortive infection is associated with leakage of beta-galactosidase from the cell. A recombinant plasmid containing a 2.8 kb fragment of ColIdrd-1 encodes colicin Ib but fails to cause abortive infection. Tn5 and Tn10 insertions into ColIdrd-1 that abolish colicin Ib production have no effect on the abortive infection phenotype. These findings are inconsistent with a previously proposed role for colicin Ib in causing phage infections to abort.
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