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FEMS Microbiol Lett. 2004 Oct 1;239(1):157-61.

Resistance of Gram-positive bacteria to nisin is not determined by lipid II levels.

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NIZO Food Research, P.O. Box 20, 6710 BA, Ede, Netherlands.


Lipid II is essential for nisin-mediated pore formation at nano-molar concentrations. We tested whether nisin resistance could result from different Lipid II levels, by comparing the maximal Lipid II pool in Micrococcus flavus (sensitive) and Listeria monocytogenes (relatively insensitive) and their nisin-resistant variants, with a newly developed method. No correlation was observed between the maximal Lipid II pool and nisin sensitivity, as was further corroborated by using spheroplasts of nisin-resistant and wild-type strains of M. flavus, which were equally sensitive to nisin.

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