Donkey Milk
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ABSTRACT:
PROVIDER: PRJNA612663 | ENA |
REPOSITORIES: ENA
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Project description:Background: milk is considered an important source of bioactive peptides, which can be produced by endogenous or starter bacteria, such as lactic acid bacteria, that are considered effective and safe producers of food-grade bioactive peptides. Among the various types of milk, donkey milk has been gaining more and more attention for its nutraceutical properties. Methods: Lactobacillus rhamnosus 17D10 and Lactococcus lactis subsp. cremoris 40FEL3 were selected for their ability to produce peptides from donkey milk. The endogenous peptides and those obtained after bacterial fermentation were assayed for their antioxidant, antibacterial and antiviral activities. The peptide mixtures were characterized by means of LC-MS/MS, and then analyzed in silico using the Milk Bioactive Peptide DataBase. Results: the peptides produced by the two selected bacteria enhanced the antioxidant activity and reduced E. coli growth. Only the peptides produced by L. rhamnosus 17D10 were able to reduce S. aureus growth. All the peptide mixtures were able to inhibit the replication of HSV-1 by more than 50%. Seventeen peptides were found to have 60% sequence similarity with already known bioactive peptides. Conclusion: a lactic acid bacterium fermentation process is able to enhance the value of donkey milk through bioactivities that are important for human health.
2021-09-07 | PXD027765 | Pride
Project description:A comprehensive glycosylation profile of donkey lactoferrin, isolated by ion exchange chromatography from an individual milk sample, was obtained by means of chymotryptic digestion, TiO2 and HILIC enrichment, reversed-phase high performance liquid chromatography, electrospray mass spectrometry, and high collision dissociation fragmentation. The results obtained allowed the identification of 26 different glycan structures, including high mannose, complex and hybrid N-glycans, linked to the protein backbone via an amide bond to asparagine residues located at the positions 137, 281 and 476. Altogether, the N-glycan structures determined revealed that in donkey milk lactoferrin most of the N-glycans identified are neutral complex/hybrid. Actually, 10 neutral non-fucosylated complex/hybrid N-glycans and 4 neutral fucosylated complex/hybrid N-glycans were found. In addition, 2 high mannose N-glycans, 4 sialylated fucosylated complex/hybrid N-glycans and 6 sialylated non-fucosylatedN-glycans, one of which containing N-glycolylneuramin acid (Neu5Gc), were found. A comparison of the glycosylation profile of donkey milk lactoferrin with respect to that of human, bovine and goat milk lactoferrin is reported.
2016-08-25 | PXD004289 | Pride
Project description:Although the composition of donkey milk is similar to that of human milk, systematic comparisons of the site-specific N-glycosylation patterns of their whey proteins are lacking. In this study, hydrophilic interaction chromatography-based enrichment of intact N-glycopeptides, coupled with a site-specific glycoproteomics strategy, was used to systematically characterise whey N-glycoproteins in donkey colostrum (DC), donkey mature milk (DM), human colostrum (HC), and human mature milk (HM) for the first time. We identified 628, 347, 868, and 425 site-specific N-glycans mapped to 135, 67, 113, and 60 glycoproteins in DC, DM, HC, and HM, respectively. Bioinformatic analysis revealed the potential biological effects of N-glycosylation modifications on the whey proteins themselves. Our findings elucidated the composition of donkey and human milk whey N-glycoproteins and their potential structure-activity relationships and provided guidance for the production of specific functional donkey milk products and the development of donkey milk-based infant formulas.
2024-03-19 | PXD050759 | iProX