Nisin-triggered activity of Lys44, the secreted endolysin from Oenococcus oeni phage fOg44.

The intrinsic resistance of Oenococcus oeni cells to the secreted endolysin from oenophage fOg44 (Lys44) was investigated. Experiments with several antimicrobials support the hypothesis that the full activity of Lys44 requires sudden ion-nonspecific dissipation of the proton motive force, an event undertaken by the fOg44 holin in the phage infection context.