groE genes affect SOS repair in Escherichia coli

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · Journal of Bacteriology; (USA)

OSTI ID:6316151

Liu, S K; Tessman, I ^[1]

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1. Purdue Univ., West Lafayette, IN (USA)

Repair of UV-irradiated bacteriophage in Escherichia coli by Weigle reactivation requires functional recA+ and umuD+C+ genes. When the cells were UV irradiated, the groE heat shock gene products, GroES and GroEL, were needed for at least 50% of the Weigle reactivation of the single-stranded DNA phage S13. Because of repression of the umuDC and recA genes, Weigle reactivation is normally blocked by the lexA3(Ind-) mutation (which creates a noncleavable LexA protein), but it was restored by a combination of a high-copy-number umuD+C+ plasmid and a UV dose that increases groE expression. Maximal reactivation was achieved by elevated amounts of the Umu proteins, which was accomplished in part by UV-induced expression of the groE genes. By increasing the number of copies of the umuD+C+ genes, up to 50% of the normal amount of reactivation of S13 was achieved in an unirradiated recA+ host.

• OSTI ID: 6316151
• Journal Information: Journal of Bacteriology; (USA), Vol. 172:10; ISSN 0021-9193
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ESCHERICHIA COLI
DNA REPAIR
BACTERIOPHAGES
DOSE-RESPONSE RELATIONSHIPS
GENES
GENETIC RADIATION EFFECTS
GENOTYPE
ULTRAVIOLET RADIATION
BACTERIA
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
BIOLOGICAL RECOVERY
BIOLOGICAL REPAIR
ELECTROMAGNETIC RADIATION
GENETIC EFFECTS
MICROORGANISMS
PARASITES
RADIATION EFFECTS
RADIATIONS
RECOVERY
REPAIR
VIRUSES
560130* - Radiation Effects on Microorganisms