recF-dependent induction of recA synthesis by coumermycin, a specific inhibitor of the B subunit of DNA gyrase.

Abstract:

:Genetic and biochemical studies on enzymes known to be involved in regulating DNA supercoiling yield a complex spectrum of effects on the Escherichia coli SOS system. Previous studies indicated that only inhibition of DNA gyrase by antibiotics that act on the DNA gyrase A subunit results in turning on the E. coli SOS system. Here we show that coumermycin, an antibiotic that acts on the DNA gyrase B subunit, can also induce. Like nalidixic acid induction, coumermycin induction is dependent on the recBC DNase. In both cases induction apparently results from a response of the cell to the DNA gyrase-inhibitor complex rather than just the loss of DNA gyrase activity. However, unlike induction by the DNA gyrase A-specific antibiotics, coumermycin induction also requires the recF gene product. This demonstrates a functional relationship between DNA gyrase and the recF gene product.

authors

Smith CL

doi

10.1073/pnas.80.9.2510

subject

Has Abstract

pub_date

1983-05-01 00:00:00

pages

2510-3

issue

9

eissn

0027-8424

issn

1091-6490

journal_volume

80

pub_type

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