title: Cryptic plasmids isolated from Campylobacter strains represent multiple, novel incompatibility groups.
abstract: Three small, cryptic plasmids from the multi-drug-resistant (MDR) Campylobacter coli strain RM2228 and one small, cryptic plasmid from the MDR Campylobacter jejuni strain RM1170 were sequenced and characterized. pCC2228-1 has some similarity to Firmicutes RepL family plasmids that replicate via a rolling-circle mechanism. pCC2228-2 is a theta-replicating, iteron-containing plasmid (ICP) that is a member of the same incompatibility (Inc) group as previously described Campylobacter shuttle vectors. The other two ICPs, pCC2228-3 and pCJ1170, represent a second novel Inc group. Comparison of the four plasmids described in this study with other characterized plasmids from C. jejuni, C. coli, C. lari, and C. hyointestinalis suggests that cryptic plasmids in Campylobacter may be classified into as many as nine Inc groups. The plasmids characterized in this study have several unique features suitable for the construction of novel Campylobacter shuttle vectors, e.g., small size, absence of many common multiple-cloning site restriction sites, and Inc groups not represented by current Campylobacter shuttle plasmids. Thus, these plasmids may be used to construct a new generation of Campylobacter shuttle vectors that would permit transformation of environmental Campylobacter isolates with an existing repertoire of native plasmids.
authors.affiliation: Produce Safety and Microbiology Research Unit, Agricultural Research Service, US Department of Agriculture, Albany, CA 94710, USA. bmiller@pw.usda.gov
authors.forename: William G
authors.initials: WG
authors.lastname: Miller
authors.forename: Sekou
authors.initials: S
authors.lastname: Heath
authors.forename: Robert E
authors.initials: RE
authors.lastname: Mandrell
mesh_terms: D001426:Bacterial Proteins; D001482:Base Composition; D001483:Base Sequence; D002167:Campylobacter / Q000235:genetics*; D017000:Campylobacter coli / Q000235:genetics; D044862:Campylobacter hyointestinalis / Q000235:genetics; D016123:Campylobacter jejuni / Q000235:genetics; D044863:Campylobacter lari / Q000235:genetics; D004352:Drug Resistance, Microbial / Q000235:genetics; D018628:Gene Dosage; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D010802:Phylogeny; D010957:Plasmids / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification*; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid
chemical_list: D001426:Bacterial Proteins