Summary
Bioactive peptides have been identified as digestion products of several food proteins. All the bioactive sequences are hidden in an inactive state inside the polypeptide chain of the larger protein. Milk proteins are a rich source of biologically active peptides such as exorphins (casomorphins), phosphopeptides and immunopeptides. Such peptides are released during intestinal digestion of caseins and whey proteins. They may be involved in regulation of nutrient entry and influence the postprandial metabolism via stimulation of the secretion of hormones. Furthermore, they may exert a stimulating effect on the immune system. These findings offer new aspects for evaluating the nutritive value of food proteins. Moreover, bioactive peptides have already found interesting applications as dietary supplements and as pharmaceutical preparations.
Zusammenfassung
Bioaktive Peptide treten als Verdauungsprodukte verschiedener Nahrungsproteine auf. Alle bioaktiven Sequenzen liegen in inaktiver Form in der Primärstruktur des höhermolekularen Proteins vor. In Milchproteinen sind zahlreiche biologisch aktive Peptide enthalten, beispielsweise Exorphine (Casomorphine), Phosphopeptide und Immunopeptide. Solche Peptide können während der intestinalen Verdauung der Caseine und Molkenproteine freigesetzt werden. Die möglichen physiologischen Wirkungen bestehen in der Beteiligung an der Regulation der Nährstoffaufnahme sowie der Beeinflussung des postprandialen Stoffwechsels durch Stimulierung der Sekretion verschiedener Hormone. Außerdem können sie einen stimulierenden Effekt auf das Immunsystem ausüben. Diese Erkenntnisse bieten neue Aspekte zur Beurteilung der nutritiven Qualität von Nahrungsproteinen. Darüber hinaus ergeben sich für bioaktive Peptide sowohl diätetische als auch pharmazeutische Anwendungsmöglichkeiten.
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Meisel, H., Frister, H. & Schlimme, E. Biologically active peptides in milk proteins. Z Ernährungswiss 28, 267–278 (1989). https://doi.org/10.1007/BF02019390
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DOI: https://doi.org/10.1007/BF02019390
Key words
- milkproteins
- bioactivepeptides
- exorphins (casomorphins)
- phosphopeptides
- immunopeptides
- nutritive value of foodproteins