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Bioactive peptides released from Saccharomyces cerevisiae under accelerated autolysis in a wine model system
J M Alcaide-Hidalgo1, E Pueyo, M C Polo
1Inst. de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006, Madrid, Spain.
Abstract:
The ACE inhibitory activity (IACE) and the oxygen radical absorbance capacity (ORAC-FL) values of yeast peptides isolated from a model wine during accelerated autolysis of Saccharomyces cerevisiae have been studied. Samples were taken at 6, 24, 48, 121, and 144 h of autolysis. Peptide concentration increased throughout autolysis process. Peptides were fractionated into 2 fractions: F1, constituted by hydrophilic peptides, and F2, containing hydrophobic peptides. Both IACE activity and ORAC-FL values increased during 121 h of autolysis, then decreased afterward. Peptide fraction F2 was the main fraction involved in IACE activity and ORAC-FL.
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