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. 1990 Feb;172(2):949–955. doi: 10.1128/jb.172.2.949-955.1990

Natural transformation in Campylobacter species.

Y Wang 1, D E Taylor 1
PMCID: PMC208523  PMID: 2404960

Abstract

Growing cells of Campylobacter coli and C. jejuni were naturally transformed by naked DNA without the requirement for any special treatment. Transformation frequencies for homologous chromosomal DNA were approximately 10(-3) transformants per recipient cell in C. coli and 10(-4) in C. jejuni. Maximum competence was found in the early log phase of growth. Campylobacters preferentially took up their own DNA in comparison with Escherichia coli chromosomal DNA, which was taken up very poorly. Three new Campylobacter spp.-to-E. coli shuttle plasmids, which contained additional cloning sites and selectable markers, were constructed from the shuttle vector pILL550A. These plasmid DNAs were taken up by campylobacters much less efficiently than was homologous chromosomal DNA, and transformation into plasmid-free cells was very rare. However, with the use of recipients containing a homologous plasmid, approximately 10(-4) transformants per cell were obtained. The tetM determinant, originally obtained from Streptococcus spp. and not heretofore reported in Campylobacter spp., was isolated from an E. coli plasmid and was introduced, selecting for tetracycline resistance, by natural transformation into C. coli.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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