Abstract：
:Despite the prevalence of Arthrobacter in the environment little is known about their plasmids, or the capacity of Arthrobacter plasmids to mediate horizontal gene transfer. In this study, we compared eight plasmids from five Arthrobacter strains in order to identify putative core maintenance genes for replication, segregation, and conjugation. Iteron like sequences were identified on some of the plasmids; however, no genes with obvious similarity to known replication sequences such as an origin of replication, or rep genes were identified. All eight plasmids contained a putative conjugation system. Genes with similarity to a relaxase, coupling protein, and various components of a type IV secretion system were identified on each plasmid; it appears that three different systems may be present. Putative parA partitioning genes were found in all of the plasmids. Each of the Arthrobacter strains examined contained a putative parB gene; however, of the three plasmids in Arthrobacter strain FB24 only one plasmid had a putative parB gene. Cluster analysis of many of the Arthrobacter genes suggested that they often formed branches within existing families of plasmid maintenance genes. Comparison of a concatenation of all the maintenance genes from each plasmid suggests that the eight Arthrobacter plasmids represent multiple evolutionary pathways.
journal_name
Plasmidjournal_title
Plasmidauthors
Jerke K,Nakatsu CH,Beasley F,Konopka Adoi
10.1016/j.plasmid.2007.12.003subject
Has Abstractpub_date
2008-03-01 00:00:00pages
73-85issue
2eissn
0147-619Xissn
1095-9890pii
S0147-619X(07)00129-1journal_volume
59pub_type
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