Abstract
A recA-independent recombinational event is described which results in insertion of an entire plasmid genome at a unique site of another plasmid, and coincident excision of a precisely defined DNA segment originally present at the point of the insertion. The resulting recombinant molecules subsequently can undergo site-specific translocation of their component segments or inversion of their original DNA sequence orientation. The events observed entail nonreciprocal exchange of genetic material, and involve a discrete nucleotide sequences that is duplicated in rotationally symmetrical reverse orientation on plasmid DNA (i.e., inverted repeat; palindrome).
MeSH Terms
Base Sequence
Centrifugation, Density Gradient
DNA, Bacterial/metabolism
Electrophoresis
Escherichia coli/metabolism,ultrastructure
Extrachromosomal Inheritance
Genes
Microscopy, Electron
Molecular Weight
Mutation
Plasmids
Recombination, Genetic
Transformation, Genetic
Translocation, Genetic
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Kopecko D J
Cohen S N
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