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J Bacteriol. 1972 July; 111(1): 80-85
Copyright © 1972 American Society for Microbiology. All Rights Reserved.

Chromosome Transfer by Autonomous Transmissible Plasmids: the Role of the Bacterial Recombination (rec) System

^a MRC Molecular Genetics Unit, Department of Molecular Biology, The University of Edinburgh, Edinburgh EH9 3JR, Scotland

ABSTRACT

The ability of autonomous transmissible plasmids or sex factors to transfer chromosomal genes to F^– recipient bacteria has been investigated by using a series of rec⁺ and recA^– donor strains. It is concluded that chromosome transfer by most sex factors is virtually dependent upon the functional integrity of the bacterial recombination system. However, evidence is presented that suggests the existence of plasmid-specified mechanisms of interaction with the chromosome which are independent of the bacterial recombination system.

¹ Present address: Department of Microbiology, University of Arizona, College of Medicine, Tucson, Arizona 85724.