Schema of circularized plasmids. The red arrows indicate mobility genes (relaxase gene and type IV secretion system coupling protein [T4CP] gene). The orange arrows indicate mating pair formation (MPF) genes. The aqua arrows indicate establishment genes. The green arrows indicate replication and stability genes. The gray arrows indicate other coding genes. The black arrows indicate hypothetical protein-encoding genes. The innermost ring shows GC content, and the middle ring shows GC skew. (A) pKUN4507_1 detected from Achromobacter xylosoxidans KUN4507 and Klebsiella pneumoniae KUN5033. The plasmid pKUN4507_1 harbors mobility genes and two MPF genes, which indicate a mobilizable plasmid. This plasmid harbored a class 1 integron including blaIMP-19. (B) pKUN4507_2, another plasmid detected in A. xylosoxidans KUN4507. The plasmid pKUN4507_2 lacks a relaxase gene and many MPF genes and is not considered to be transferable. (C) pKUN4843_1, including a class 1 integron and many transposase genes detected in Klebsiella pneumoniae KUN4843 and KUN5033. (D) pKUN4843_2, detected in K. pneumoniae KUN4843 and KUN5033. This plasmid has almost all of the genes required for conjugative transfer and was considered to be a conjugative plasmid.