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Microbiology and Molecular Biology Reviews, December 2001, p. 481-496, Vol. 65, No. 4
1092-2172/01/$04.00+0   DOI: 10.1128/MMBR.65.4.481-496.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Comparative Biology of IncQ and IncQ-Like Plasmids

Douglas E. Rawlings1,* and Erhard Tietze2

Department of Microbiology, University of Stellenbosch, Matieland 7602, South Africa,1 and Robert Koch-Institut, Bereich Wernigerode, D38843 Wernigerode, Germany2

Plasmids belonging to Escherichia coli incompatibility group Q are relatively small (approximately 5 to 15 kb) and able to replicate in a remarkably broad range of bacterial hosts. These include gram-positive bacteria such as Brevibacterium and Mycobacterium and gram-negative bacteria such as Agrobacterium, Desulfovibrio, and cyanobacteria. These plasmids are mobilized by several self-transmissible plasmids into an even more diverse range of organisms including yeasts, plants, and animal cells. IncQ plasmids are thus highly promiscuous. Recently, several IncQ-like plasmids have been isolated from bacteria found in environments as diverse as piggery manure and highly acidic commercial mineral biooxidation plants. These IncQ-like plasmids belong to different incompatibility groups but have similar broad-host-range replicons and mobilization properties to the IncQ plasmids. This review covers the ecology, classification, and evolution of IncQ and IncQ-like plasmids.

* Corresponding author. Mailing address: Department of Microbiology, University of Stellenbosch, Private Bag XI, Matieland 7602, South Africa. Phone: 27 21 808 5848. Fax: 27-21-808 5846. E-mail: der{at}sun.ac.za.

Microbiology and Molecular Biology Reviews, December 2001, p. 481-496, Vol. 65, No. 4
1092-2172/01/$04.00+0   DOI: 10.1128/MMBR.65.4.481-496.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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Copyright © 2001 by the American Society for Microbiology. All rights reserved.