Genus-Specific Distribution and Pathovar-Specific Variation of the Glycinecin R Gene Homologs in Xanthomonas genomes

Eunjung Roh; Sunggi Heu; Eunpyo Moon

doi:10.1007/s12275-008-0209-9

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Genus-Specific Distribution and Pathovar-Specific Variation of the Glycinecin R Gene Homologs in Xanthomonas genomes: Eunjung Roh ^1#, Sunggi Heu ², Eunpyo Moon ¹; Journal of Microbiology 2008;46(6):681-686.
DOI: https://doi.org/10.1007/s12275-008-0209-9
Published online: December 24, 2008

¹Department of Biological Sciences, Ajou University, Suwon 442-749, Republic of Korea, ²Department of Plant Pathology, NIAST, RDA, Suwon 441-707, Republic of Korea,^# Present address: Department of Plant Pathology, NIAST, RDA, Suwon 441-707, Republic of Korea

Corresponding author: Eunpyo Moon , Tel: 82-31-219-2620,

Received: 20 August 2008 • Accepted: 26 August 2008

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Abstract

Xanthomonas axonopodis pv. glycines produces bacteriocins called glycinecin, and two glycinecin genes, glyA and glyR, were reported previously. In this paper, we describe genomic distribution and variation of the glyR gene revealed by extensive Southern hybridization analysis. In contrast to the glyA gene present only in X. axonopodis pv. glycines, the glyR gene was found to be distributed widely in all the pathovars of Xanthomas genus. It was also found that the glyR gene is a multigene family while the glyA is a single copy gene. Moreover, the copy number and the variation of the glyR multigene are unique to each pathovar of Xanthomonas. The uniqueness can be easily detected by the patterns resulted from Southern hybridization using the genomic digests. Thus, we suggest the glyR gene can serve as a useful genus-specific and pathovarspecific DNA marker for Xanthomonas. One of the glyR homologs was further isolated from X. axonopodis pv. glycines, and analyzed to be functional with strong inhibitory activity against several members of Xanthomonas.

Keywords: glycinecin;glyR;multigene;Xanthomonas;genus-specific;pathovar-specific

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Genus-Specific Distribution and Pathovar-Specific Variation of the Glycinecin R Gene Homologs in Xanthomonas genomes

J. Microbiol. 2008;46(6):681-686. Published online December 24, 2008

DOI: https://doi.org/10.1007/s12275-008-0209-9

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