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Peptides. 2008 Jun;29(6):969-77. doi: 10.1016/j.peptides.2008.01.011. Epub 2008 Jan 31.

Bovine hemoglobin: an attractive source of antibacterial peptides.

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  • 1Laboratoire de Procédés Biologiques Génie Enzymatique et Microbien, IUTA, Polytech'Lille, Lille I, BP 179, 59653 Villeneuve d'Ascq Cedex, France. Naima.Arroume@univ-lille1.fr

Abstract

A peptic hemoglobin hydrolysate was fractioned by a semi-preparative reversed-phase HPLC and some fractions have an antibacterial activity against four bacteria strains: Micrococcus luteus A270, Listeria innocua, Escherichia coli and Salmonella enteritidis. These fractions were analyzed by ESI/MS and ESI/MS/MS, in order to characterize the peptides in these fractions. Each fraction contains at least three peptides and some fractions contain five peptides. All these fractions were purified several times by HPLC to obtain pure peptides. Thirty antibacterial peptides were identified. From the isolated antibacterial peptides, 24 peptides were derived from the alpha chains of hemoglobin and 6 peptides were derived from the beta chains of hemoglobin. The lowest concentration of these peptides (minimum inhibitory concentration (MIC)) necessary to completely inhibit the growth of four bacteria strain was determined. The cell population of all of the tested bacteria species decreased by at least 97% after a 24-h incubation with any of the peptides at the minimum inhibitory concentration.

PMID:
18342399
[PubMed - indexed for MEDLINE]
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