Rhizobium etli CFN42 contains at least three plasmids of the repABC family: a structural and evolutionary analysis.
In this paper, we report the identification of replication/partition regions of plasmid p42a and p42b of Rhizobium etli CFN42. Sequence analysis reveals that both replication/partition regions belong to the repABC family. Phylogenetic analysis of all the complete repABC replication/partition regions reported to date, shows that repABC plasmids coexisting in the same strain arose most likely by lateral transfer instead of by duplication followed by divergence. A model explaining how new incompatibility groups originate, is proposed.
Cevallos
Miguel A
MA
Programa de Evolución Molecular, Centro de Investigación sobre Fijación de Nitrógeno, Universidad Nacional Autónoma de México, Apartado Postal 565-A, Cuernavaca, Morelos, Mexico. mac@cifn.unam.mx
Porta
Helena
H
Izquierdo
Javier
J
Tun-Garrido
Cristina
C
García-de-los-Santos
Alejandro
A
Dávila
Guillermo
G
Brom
Susana
S
D001483:Base Sequence; D003227:Conjugation, Genetic; D004269:DNA, Bacterial / Q000235:genetics*; D019143:Evolution, Molecular; D005798:Genes, Bacterial / Q000235:genetics; D008969:Molecular Sequence Data; D010802:Phylogeny; D010957:Plasmids / Q000145:classification* / Q000235:genetics*; D018741:Replication Origin / Q000235:genetics; D012231:Rhizobium / Q000235:genetics*
D004269:DNA, Bacterial