Mu-1 directed inhibition of DNA breakdown in Escherichia coli, recA cells
- PMID: 360037
- DOI: 10.1007/BF00267606
Mu-1 directed inhibition of DNA breakdown in Escherichia coli, recA cells
Abstract
The spontaneous DNA breakdown exhibited by recA strains, is reduced after heat induction of a thermoinducible Mu-1 prophage. This inhibition is dependent upon RNA synthesis, suggesting that Mu-1 directs synthesis of a recBC nuclease inhibitor, analogous to the product of the lambda gam gene. The genetic evidence presented here shows that Mu-1 enables a lambda red gam phage to grow on a recA host. The in vitro assay for ATP-dependent exonuclease activity reveals a complete inhibition of this activity 30 min after induction of the Mu-1 prophage.
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