Enzymatic digestion of wine lees proteins released 34 ACE-inhibitory peptide sequences with good oral bioavailability predictions, plus antimicrobial peptides effective against E. coli, turning winery waste into a source of multifunctional bioactive peptides.
34 ACE-inhibitory sequencesBioactive peptide sequences released from wine lees proteins after simulated gastrointestinal digestion, with predicted oral bioavailability and non-toxicity
What the researchers found
Enzymatic hydrolysis of wine lees proteins with alcalase, flavourzyme, and protease produced peptides with both ACE inhibitory and antimicrobial activities. Protease hydrolysate showed the highest antimicrobial activity against E. coli, associated with a high proportion of positively charged peptides.
In silico gastrointestinal digestion simulation identified 34 ACE-inhibitory peptide sequences from the hydrolysates. Of these, 8 di-/tripeptides (AF, AW, GF, GL, GW, PL, PM, VW) were predicted to have positive human intestinal absorption. VW and AW showed the strongest ACE binding energies (lower than -8.0 kcal/mol) in molecular docking. All predicted peptides were non-toxic with desirable drug-like properties per Lipinski's rule-of-five.
Why it matters
The wine industry generates massive amounts of lees waste. Converting this into bioactive peptide ingredients serves dual purposes: reducing environmental waste and creating value-added health products. The simultaneous identification of blood-pressure-lowering and antimicrobial peptides from a single waste source is particularly appealing for the functional food industry, where multifunctional ingredients command premium prices.
How the study worked
Wine lees proteins were hydrolyzed with three proteases individually and in combination. Peptidomics profiling used nano-LC-Orbitrap tandem mass spectrometry. Virtual screening categorized peptides by bioactivity. In silico gastrointestinal digestion simulated peptide release. ADMET (absorption, distribution, metabolism, excretion, toxicity) properties were predicted using physicochemical modeling. Molecular docking characterized ACE binding interactions. Antimicrobial activity was tested against food-borne organisms.
What this study cannot tell us
All ACE inhibitory and bioavailability data are based on in silico predictions and molecular docking — no actual in vitro ACE inhibition assays or in vivo blood pressure studies were reported. Computational predictions of bioavailability often differ from experimental results. The antimicrobial activity was demonstrated in vitro but not in food preservation contexts. Predicted gastrointestinal stability of these small peptides needs experimental validation. Scale-up economics and regulatory pathways for food ingredient applications were not addressed.
How to read the evidence
This is a computational and in vitro study. The peptidomics and molecular docking provide strong theoretical support, but the biological activities are largely predicted rather than experimentally validated. No animal or human studies were conducted.
When this study was published
Published in 2026, this is a very recent study reflecting current trends in sustainable peptide discovery and food waste valorization.
The bigger picture
This study exemplifies the circular bioeconomy approach to peptide discovery — using food processing waste as a raw material for bioactive compound production. Wine lees join a growing list of underutilized food byproducts (cheese whey, fish processing waste, spent grains) being mined for bioactive peptides. The comprehensive pipeline from enzymatic hydrolysis through peptidomics, virtual screening, ADMET prediction, and molecular docking represents a modern approach to functional peptide discovery that can be applied to many waste biomass sources.
Questions still open
- Do the predicted ACE-inhibitory peptides from wine lees actually lower blood pressure when consumed orally in animal or human studies?
- Could wine lees-derived peptide fractions be developed as natural food preservatives combining antimicrobial activity with blood pressure benefits?
- How do the ACE inhibitory potencies of wine lees peptides compare to established food-derived antihypertensive peptides from dairy or marine sources?
Common questions
Could drinking wine lower blood pressure through these peptides?
What are wine lees and why are they interesting for health research?
Read the original research
Unveiling antihypertensive and antimicrobial peptides from wine lees: Enzymatic hydrolysis, peptidomics profiling, virtual screening, functional characterization, and molecular docking.
Food research international (Ottawa, Ont.), 229, 118462
Citation
Monasterio, Romina; Iram, Daraksha; Knuf, Franziska; Caspers-Weiffenbach, Rita; Fontana, Ariel. (2026). Unveiling antihypertensive and antimicrobial peptides from wine lees: Enzymatic hydrolysis, peptidomics profiling, virtual screening, functional characterization, and molecular docking.. Food research international (Ottawa, Ont.), 229, 118462. https://doi.org/10.1016/j.foodres.2026.118462