Diversity, biology and evolution of IncQ-family plasmids
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Douglas E. Rawlings
· Stellenbosch University
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Douglas E. Rawlings is a registered researcher in their academic field.
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Comparative Biology of IncQ and IncQ-Like Plasmids
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.