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Appl Environ Microbiol. 1986 October; 52(4): 812-818
Copyright © 1986, American Society for Microbiology. All Rights Reserved.

Thirteen Virulent and Temperate Bacteriophages of Lactobacillus bulgaricus and Lactobacillus lactis Belong to a Single DNA Homology Group

Mireille Mata*, Annie Trautwetter, Gisèle Luthaud and Paul Ritzenthaler

1 Centre de Transfert, I.N.S.A., 31077 Toulouse Cédex, and Laboratoire de Microbiologie, I.N.S.A., 69621 Villeurbanne Cédex, 2 France

ABSTRACT

Thirteen virulent phages and two temperate phages of two closely related bacterial species (Lactobacillus lactis and L. bulgaricus) were compared for their protein composition, their antigenic properties, their restriction endonuclease patterns, and their DNA homology. The immunoblotting studies and the DNA-DNA hybridizations showed that the phages could be differentiated into two groups. One group contained 2 temperate phages of L. bulgaricus and 11 virulent phages of L. lactis. Inside each group, at least two common proteins of identical sizes could be detected for each phage. These proteins were able to cross-react in immunoblotting experiments with an antiserum raised against one phage of the same group. Temperate phage DNAs showed partial homology with DNAs from some virulent phages. These homologies seem to be located on the region coding for the structural proteins since recombinant plasmids coding for one of the major phage proteins of one phage were able to hybridize with the DNAs from phages of the same group. These results suggest that temperate and virulent phages may be related to one another.

FOOTNOTES

* Corresponding author.

Appl Environ Microbiol. 1986 October; 52(4): 812-818
Copyright © 1986, American Society for Microbiology. All Rights Reserved.



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