Enzymatic production of bioactive peptides from scotta, an exhausted by-product of ricotta cheese processing

Autoři: Stefania Monari aff001;  Maura Ferri aff001;  Claudio Russo aff003;  Barbara Prandi aff004;  Tullia Tedeschi aff004;  Paolo Bellucci aff001;  Angelo Vittorio Zambrini aff005;  Emanuela Donati aff005;  Annalisa Tassoni aff001
Působiště autorů: Department of Biological, Geological, Environmental Science, University of Bologna, Bologna, Italy aff001;  Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Bologna, Italy aff002;  Territorial and Production Systems Sustainability Department, Biotechnologies and Agroindustry Division, BioProducts and BioProcesses, ENEA Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Roma, Italy aff003;  Department of Food and Drug, University of Parma, Parma, Italy aff004;  Department of Quality, Innovation, Safety, Environment, Granarolo S.p.A., Bologna, Italy aff005
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0226834


The present work reports the enzymatic valorisation of the protein fraction of scotta, a dairy by-product representing the exhausted liquid residue of ricotta production. Scotta was subjected to ultra-filtration with membrane cut-offs from 500 to 4 kDa and the obtained protein-enriched fractions were used for the optimization of enzyme-based digestions aimed at producing potentially bioactive peptides. Nine different commercial proteases were tested and the best digestion conditions were selected based on protein yield, fraction bioactivity and foreseen scale up processing costs. Scale up of the 3% Pancreatin or 5% Papain processes was performed up to 2 L (37°C or 60°C respectively, 1 h incubation), and the digestion efficiency increased with the reaction volume as well as antioxidant activity (up to 60 gBSA eq/L and to 1.7 gAA eq/L). Retentate 1 digested fractions also showed, for the first time in dairy-based peptides, anti-tyrosinase activity, up to 0.14 gKA eq/L. Digested proteins were sub-fractionated by means of physical membrane separations and 30–10 kDa fraction from Papain treatment showed the highest antioxidant and anti-tyrosinase activities. The peptide sequence of the most bioactive fractions was achieved.

Klíčová slova:

Antioxidants – Cysteine – Cysteine proteases – Chymotrypsin – Milk – Proteases – Ultrafiltration – Digestion


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