Partial replication of UV-irradiated T4 bacteriophage DNA results in amplification of specific genetic areas

Journal Article · Sun Nov 01 00:00:00 EST 1981 · J. Virol.; (United States)

OSTI ID:5707510

Ling, S ^[1]; Vogelbacker, H H; Restifo, L L; Mattson, T; Kozinski, A W

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1. Univ. of Pennsylvania School of Medicine, Philadelphia

Upon infection of Escherichia coli with bormodeoxyuridine-labeled T4 phage that had received 10 lethal hits of UV irradiation, a sizable amount of phage DNA was synthesized (approximately 36 phage equivalent units of DNA per infected bacterium), although very little multiplicity reactivation occurs. This progeny DNA was isolated and analyzed. This DNA was biased in its genetic representation, as shown by hybridization to cloned segments of the T4 genome immobilized on nitrocellulose filters. Preferentially amplified areas corresponded to regions containing origins of T4 DNA replication. The size of the progeny DNA increased with time after infection, possibly due to recombination between partial replicas and nonreplicated subunits or due to the gradual overcoming of the UV damage. As the size of the progeny DNA increased, all of the genes were more equally represented, resulting in a decrease in the genetic bias. Amplification of specific genetic areas was also observed upon infection with UV-irradiated, non-bromo-deoxyuridine-substituted (light) phage. However, the genetic bias observed in this case was not as great as that observed with bromodeoxyuridine-substituted phage. This is most likely due to the higher efficiency of multiplicity reactivation of the light phage.

• OSTI ID: 5707510
• Journal Information: J. Virol.; (United States), Vol. 40:2
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BACTERIOPHAGES
BIOLOGICAL REPAIR
ENZYME ACTIVITY
ULTRAVIOLET RADIATION
BUDR
PHOTOLYSIS
MICROCOCCUS LUTEUS
ESCHERICHIA COLI
EXPERIMENTAL DATA
MUTATIONS
ANTIMETABOLITES
AZINES
BACTERIA
BIOLOGICAL RECOVERY
BROMOURACILS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DRUGS
ELECTROMAGNETIC RADIATION
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
MICROCOCCUS
MICROORGANISMS
NUCLEOSIDES
NUCLEOTIDES
NUMERICAL DATA
ORGANIC BROMINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PARASITES
PHOTOCHEMICAL REACTIONS
PYRIMIDINES
RADIATIONS
RECOVERY
REPAIR
RIBOSIDES
URACILS
VIRUSES
560112* - Radiation Effects on Biochemicals- In Microorganisms- (-1987)