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. 1979 Nov;140(2):525–531. doi: 10.1128/jb.140.2.525-531.1979

Defective F pili and other characteristics of Flac and Hfr Escherichia coli mutants resistant to bacteriophage R17.

J M Burke, C P Novotny, P Fives-Taylor
PMCID: PMC216678  PMID: 40959

Abstract

Mutants resistant to the donor-specific bacteriophage R17 were isolated from Hfr and Flac-containing strains of Escherichia coli K-12. Thirty-five mutants were examined for the presence of F pili by electron microscopy. The pilus morphology was studied, as were the abilities of the cells to retract their pili and to synthesize new pili. Measurements were made of the efficiency of the conjugal deoxyribonucleic acid transfer and of M13 and R17 phage infection. All mutants had noticeable defects in pilus production, structure, or function. Mutants were found which produced unusually long pili, displayed wide variations in the number of pili per cell, and were deficient in pilus retraction and synthesis. Evidence is presented that there may be two pathways of pilus retraction.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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