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Literature DB >> 4521805

Constitutive expression of bacteriophage P2 early genes resulting from a tandem duplication.

Abstract

A tandem-duplication mutant of bacteriophage P2 was isolated. Physically, its particles are characterized by a higher buoyant density and lower heat stability than the wild type, both consequences of increased DNA content. Genetically, the mutant is easily recognized by its insensitivity to control by the immunity-specific repressor. The duplication covers part of gene B, necessary for phage DNA replication. To explain the immunity-insensitivity of the duplication it is proposed that the promoter, but not the operator site, in the early gene operon is duplicated in this mutant. By crosses with a gene-B mutant, a recombinant carrying a heterozygous duplication was isolated.

Entities: Species

Mesh：

Substances：
DNA, Viral

Year: 1974 PMID： 4521805 PMCID： PMC387994 DOI： 10.1073/pnas.71.2.315

Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205

24 in total

2. Deletions in bacteriophage P2. Circularity of the genetic map and its orientation relative to the DNA denaturation map.

Authors: G Bertani
Journal: Mol Gen Genet Date: 1975

7. Tandem pentuplication of a DNA segment in a derivative of bacteriophage P2: its use in the study of the mechanism of DNA annealing.

Authors: G Bertani; D K Chattoraj
Journal: Nucleic Acids Res Date: 1980-03-25 Impact factor: 16.971

8. Further physical characterization of deletion and substitution mutants affecting the control of lysogeny in bacteriophage P2.

Authors: D K Chattoraj; G Bertani
Journal: Mol Gen Genet Date: 1980-04

8 in total

Constitutive expression of bacteriophage P2 early genes resulting from a tandem duplication.

1. ISOLATION AND CHARACTERIZATION OF RECOMBINATION-DEFICIENT MUTANTS OF ESCHERICHIA COLI K12.

2. Genetic map of Escherichia coli strain C.

3. Heat-stable and density mutants of phages T1, T3 and T7.

4. Preparation and characterization of temperate, non-inducible bacteriophage P2 (host: Escherichia coli).

5. Multiple recombination mechanisms in bacteriophage P2.

6. Heat denaturation of P2 bacteriophage DNA: compositional heterogeneity.

7. Calcium sensitive and other mutants of bacteriophage P2.

8. Bacteriophage P2: replication of the chromosome requires a protein which acts only on the genome that coded for it.

9. Split-operon control of a prophage gene.

10. Partial diploidy in phage T41.

1. Interaction of P2 bacteriophage with the dnaB gene of Escherichia coli.

2. Deletions in bacteriophage P2. Circularity of the genetic map and its orientation relative to the DNA denaturation map.

3. Physical mapping of bacteriophage P2 mutations and their relation to the genetic map.

4. Tandem duplication in bacteriophage P2: electron microscopic mapping.

5. Isolation and characterization of tox mutants of corynebacteriophage beta.

6. A restriction endonuclease cleavage map of bacteriophage P2.

7. Tandem pentuplication of a DNA segment in a derivative of bacteriophage P2: its use in the study of the mechanism of DNA annealing.

8. Further physical characterization of deletion and substitution mutants affecting the control of lysogeny in bacteriophage P2.