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SRNA-Xcc1
sRNA-Xcc1 (small RNA identified from ''Xanthomonas campestris'' pv. ''campestris'') is a family of trans-acting non-coding RNA (also known as small RNA). Homologs of sRNA-Xcc1 are found in a few bacterial strains belonging to alpha-proteobacteria, beta-proteobacteria, gamma-proteobacteria,and delta-proteobacteria. In ''Xanthomonas'' ''campestris'' pv. ''campestris'', sRNA-Xcc1 is encoded by an integron gene cassette and is under the positive control of the virulence regulators HrpG and HrpX.
== The Origin and Phylogenetic Distribution ==
sRNA-Xcc1 is encoded by a gene cassette in the integron of ''Xanthomonas campestris'' pv. ''campestris'' and homologs of ''sRNA-Xcc1'' are frequently found in integron gene cassettes cloned from uncultured bacterium, it is possible that sRNA-Xcc1 is originally captured by integrons from natural environments. ''sRNA-Xcc1'' homologs are found in a few taxonomically far related strains across alpha-, beta- and gamma-proteobacteria but not in close related bacteria, implying that sRNA-Xcc1 is transferred via horizontal gene transfer (HGT). sRNA-Xcc1 homologous gene are found located on Tn5542, a transposon carryed by the plasmid pHMT112 indicating that the horizontal transfer of sRNA-Xcc1 is realized by means of transposons and/or plasmids.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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