3 Conjugation
1988; Academic Press; Linguagem: Inglês
10.1016/s0580-9517(08)70070-9
ISSN0580-9517
Autores Tópico(s)Plant-Microbe Interactions and Immunity
ResumoThe specification of a conjugation system requires a relatively large amount of DNA and typically takes up about one-third of the plasmid genome. In case of the plasmid F, this is equivalent to 33 kilobases (kb) and this large input of genetic information can perhaps be correlated with the efficiency of conjugative transfer that can be 100% even in short term matings. Genetic analysis of conjugation by F shows that 25 or more genes are involved. Both for F and other plasmids where rudimentary investigations have been carried out, conjugation can be divided on both physiological and genetic bases into two parts: the recognition of recipient cells by donor cells that leads to mating pair formation and the subsequent physical transfer of plasmid DNA. This relationship probably indicates co-evolution of incompatibility and conjugation systems, because this function is entirely independent of each other.
Referência(s)