Distribution of basic replicons having homology with RepFIA, RepFIB, and RepFIC among IncF group plasmids

Peter L. Bergquist*, Soheyla Saadi, Werner K. Maas

*Corresponding author for this work

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Plasmids encoding F-like pili have been divided into groups on the basis of their incompatibility behavior. Three basic replicons have been recognized previously in the IncFI plasmid group and we have now examined their distribution in representative plasmids from 22 of the currently recognized incompatibility groups. The occurrence of these basic replicons was found to be rare outside of the IncF group, and significant hybridization was shown only for RepFIA to IncH1 and I group plasmids. Homology to the RepFIC basic replicon was found in all but one of the IncF group plasmids examined but RepFIA and RepFIB have a more restricted distribution. It appears likely that some plasmids carry vestiges of replicons which still express incompatibility but are incapable of replication. We suggest that evolutionary divergence among the plasmids of the IncF group has resulted from various genetic rearrangements among these basic replicons.

Original languageEnglish
Pages (from-to)19-34
Number of pages16
JournalPlasmid
Volume15
Issue number1
DOIs
Publication statusPublished - 1986
Externally publishedYes

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