Conjugal transfer

Regulation of virulence as well as conjugal transfer of DNA by peptide signaling seems to be important in many G- - bacteria including bacilli that have not been discussed in this review. Bacteriocin production in LAB is considered as a positive trait in environments such as food and alimentary canal and they are often regulated by PP-dependent three-component regulatory systems. 

Thus far, five peptide sex pheromones have been identified (Figure 8(a)).94 103-106 It is interesting to note that each plasmid specifically responds to only the corresponding pheromone. Each peptide sex pheromone is named cX , which induces plasmid pX . For example, cADl induces conjugative transfer of pADl. The initial letter of cX is named after the initial letter of clumping because these peptide sex pheromones drastically induce cell clumping between donor and recipient cells. 

It was found that the ate -complex formed by treatment of alkenyl-lithium with trialkylaluminum conjugatively transfers the alkenyl ligand to cyclopentenone in relatively good yield. It is noteworthy that the total yield of the expected product depends on the solvents used. The results — obtained in an analogous reaction — indicate that the addition in hydrocarbons gives as by-products more 1,4-reduction product than cyclopentenone polymer. On the other hand the cyclopentenone derived polymer becomes significant in the more basic THF. The michael addition... 

Perreten, V., Kolloffel, B., and Teuber, M. 1997. Conjugal transfer of the Tn916-like transposon TnFOl from Enterococcus faecalis isolated from cheese to other Gram-positive bacteria. Syst. Appl. Microbiol. 20, 27-38. 

The vector pR02.1.0 lacks the mob gene that is required for mobihzation and is therefore incapable of directing its own conjugal transfer from one bacterium to another. The nic/bom site is present in pR02.1.0. 

Indanes are formed in a Rh-catalyzed reaction of o-bis(3-oxoalkenyl)arenes with RB(0H)2. Formally, there is a conjugate transfer of the R group to one of the enone unit with an intramolecular Michael reaction to follow. 

Senseuss C, Reh M and Schlegel HG (1986) No correlation exists between the conjugative transfer of the autotrophic character and that of plasmids in... 

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