Reverse Transcriptase-Mediated Tropism Switching in Bordetella Bacteriophage

Author:

Liu Minghsun1,Deora Rajendar1,Doulatov Sergei R.1,Gingery Mari1,Eiserling Frederick A.1,Preston Andrew2,Maskell Duncan J.2,Simons Robert W.1,Cotter Peggy A.3,Parkhill Julian4,Miller Jeff F.1

Affiliation:

1. Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA 90095, USA.

2. Centre for Veterinary Science, Department of Clinical Veterinary Medicine, University of Cambridge, Cambridge CB3 OES, UK.

3. Department of Molecular, Cellular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA 93106, USA.

4. The Sanger Centre, The Wellcome Trust Genome Campus, Hixton, Cambridge, UK.

Abstract

Host-pathogen interactions are often driven by mechanisms that promote genetic variability. We have identified a group of temperate bacteriophages that generate diversity in a gene, designated mtd (major tropism determinant), which specifies tropism for receptor molecules on host Bordetella species. Tropism switching is the result of a template-dependent, reverse transcriptase–mediated process that introduces nucleotide substitutions at defined locations within mtd . This cassette-based mechanism is capable of providing a vast repertoire of potential ligand-receptor interactions.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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