Relationship between antibacterial activity and cell surface binding of lactoferrin in species of genus Micrococcus

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Abstract

Human lactoferrin was bactericidal in vitro for Micrococcus luteus but not for other Micrococcus species (M. radiophilus, M. roseus and M. varians). A correlation between the binding of lactoferrin to the bacterial surface and the antimicrobial action was observed. Viability assays showed that ferric, but not ferrous, salts prevented binding and consequently M. luteus was not killed. The unsaturated form of lactoferrin showed a greater affinity than that of the iron-saturated molecule for lipomannan, a lipoglycan present on the cell wall of M. luteus, supporting the role for lipomannan as one of the possible binding sites of lactoferrin on M. luteus.

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De Lillo, A., Quirós, L. M., & Fierro, J. F. (1997). Relationship between antibacterial activity and cell surface binding of lactoferrin in species of genus Micrococcus. FEMS Microbiology Letters, 150(1), 89–94. https://doi.org/10.1016/S0378-1097(97)00102-X

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