MG40 phage, a transducing phage related to P22

Grabner, M; Hartman, Philip

doi:10.1016/0042-6822(68)90071-8

Cited by 22 publications

(9 citation statements)

References 19 publications

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“…Phage hybrids of comparable genetic structure, called P221, F22 and MG-40-1, were described by Yamamoto and Anderson (1961), Young et al (1966b), Yamamoto (1967 and Grabnar and Hartman (1968). However, the sparse information available about these phages limits comparing of genetical and physiological properties.…”

Section: Discussionmentioning

confidence: 99%

Px, a hybrid between the serologically unrelated and heteroimmuneSalmonella bacteriophages P22 and Py

Prell¹

1970

Molec. Gen. Genet.

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Two new temperate Salmonella bacteriophages, Py and Px are described.Py is serologically unrelated to P22 and heteroimmune to it. Px is shown to be a hybrid phage containing genetic material from the e-region of P22 and the host range gene of Py. Px is heteroimmune to Py. Px phages seem to be formed only during vegetative replication of P22 in Py lysogenic cells. Independent events of hybrid formation may lead to genetically different types, called Px variants. The Px variants are ser~sitive to the 1)22 repressor whereas P22 is not repressed in Px lysogenie cells. The latent periods of 1)22 and the variant Px 1 are about 30 rain, whereas Py has a latent period of 60 rain. Px 1 recombines with 1)22 or Py only within the regions of genetic homology. Phenotypic mixing between 1)22 and Px or Py yields in different frequencies all possible types of mixed particles except Py-DNA with a t)22 protein coat.

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Section: Discussionmentioning

confidence: 99%

Px, a hybrid between the serologically unrelated and heteroimmuneSalmonella bacteriophages P22 and Py

Prell¹

1970

Molec. Gen. Genet.

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“…Several transducing phages related to P22 have been reported: MG40 (116), P22al (316), P22-11 (318), PSA68 (99), and L (35). Serological cross-neutralization tests indicate that P22, L, and PSA68 are closely related, while MG40 is not inactivated by antiserum against P22 or PSA68 (99).…”

Section: Introduction a Linkage Map Showingmentioning

confidence: 99%

Linkage map of Salmonella typhimurium, edition IV.

Sanderson¹

1972

Bacteriological Reviews

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“…Wild-type phage P22 C+ and its clearplaque-forming mutant C1 were obtained from M. Levine (12). Phages MG40 (7), MG178 (M. Grabner, Ph.D. thesis, Johns Hopkins University, Baltimore, Md., 1967), and L (2) were supplied by P. Amati, International Laboratory of Genetics and Biophysics, Naples, Italy. The wild-type phage, P22 C+, lysogenizes the host.…”

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confidence: 99%

MB78, a virulent bacteriophage of Salmonella typhimurium

Joshi¹,

Siddiqi²,

Rao³

et al. 1982

J Virol

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The isolation and some properties of a virulent bacteriophage of Salmonella typhimurium, MB78, which is morphologically, serologically, and physiologically unrelated to P22, are reported. The phage has a noncontractile long tail with partite ends. It cannot multiply in minimal medium in the presence of citrate. MB78-infected cells are, however, killed in such medium. This phage cannot grow in rifampin-resistant mutants of the host. The latent period of growth of this phage is much shorter than that of P22. Both sieA and sieB genes of the resident P22 prophage are required to exclude the superinfecting MB78 phage, whereas all temperate phages related to P22 are excluded by either one or both of the genes individually. Restriction endonuclease cleavage patterns of P22 and MB78 are distinctly different. The absence of homology between the two phages P22 and MB78 suggests that MB78 is not related to phage P22. In the course of studies with the temperate phages of Salmonella typhimurium, a virulent bacteriophage of the microorganism has been isolated. This phage is morphologically, serologically, and physiologically different from the temperate phage as well as the other virulent phage Felix 01 (13) of S. typhimurium reported so far. The present report deals with the purification and characterization of this new phage, which has been named MB78. MATERIALS AND METHODS [3H]thymidine (6,700 Ci/mol) was purchased from New England Nuclear Corp., Chicago, Ill. 32p in the form of orthophosphoric acid was the product of Bhabha Atomic Research Centre, Bombay, India. 2,5-Diphenyloxazole (PPO) and dimethyl 1,4-bis-(5-phenyloxazolyl)benzene (POPOP) were products of the Amersham/Searle Corp., Arlington Heights, Ill. Cesium chloride was obtained from Schwarz/Mann, Orangeburg, N.Y. All other chemicals were commercial preparations of analytical grade. Bacterial strains. S. typhimurium (LT2, strain 18)

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MG40 phage, a transducing phage related to P22

Cited by 22 publications

References 19 publications

Px, a hybrid between the serologically unrelated and heteroimmuneSalmonella bacteriophages P22 and Py

Px, a hybrid between the serologically unrelated and heteroimmuneSalmonella bacteriophages P22 and Py

Linkage map of Salmonella typhimurium, edition IV.

MB78, a virulent bacteriophage of Salmonella typhimurium

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