Noncanonical cell-to-cell DNA transfer in Thermus spp. is insensitive to argonaute-mediated interference.

ABSTRACT: Horizontal gene transfer drives the rapid evolution of bacterial populations. Classical processes that promote the lateral flow of genetic information are conserved throughout the prokaryotic world. However, some species have nonconserved transfer mechanisms that are not well known. This is the case for the ancient extreme thermophile Thermus thermophilus. In this work, we show that T. thermophilus strains are capable of exchanging large DNA fragments by a novel mechanism that requires cell-to-cell contacts and employs components of the natural transformation machinery. This process facilitates the bidirectional transfer of virtually any DNA locus but favors by 10-fold loci found in the megaplasmid over those in the chromosome. In contrast to naked DNA acquisition by transformation, the sy

SUBMITTER: Blesa A 

PROVIDER: S-EPMC4288695 | biostudies-literature | 2015 Jan

REPOSITORIES: biostudies-literature