Affiliation:
1. Section of Molecular Biology and Microbiology and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712
Abstract
ABSTRACT
The mobilization proteins of the broad-host-range plasmid R1162 can initiate conjugative transfer of a plasmid from a 19-bp locus that is partially degenerate in sequence. Such loci are likely to appear by chance in the bacterial chromosome and could act as cryptic sites for transfer of chromosomal DNA when R1162 is present. The R1162-dependent transfer of chromosomal DNA, initiated from one such potential site in
Pectobacterium atrosepticum
, is shown here. A second active site was identified in
Escherichia coli
, where it is also shown that large amounts of DNA are transferred. This transfer probably reflects the combined activity of the multiple cryptic origins in the chromosome. Transfer of chromosomal DNA due to the presence of a plasmid in the cytoplasm describes a previously unrecognized potential for the exchange of bacterial DNA.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
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