In vitro and in silico approaches to generating and identifying angiotensin-converting enzyme I inhibitory peptides from green macroalga ulva lactuca

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Title: In vitro and in silico approaches to generating and identifying angiotensin-converting enzyme I inhibitory peptides from green macroalga ulva lactuca
Authors: García-Vaquero, MarcoMora, LeticiaHayes, Maria
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Date: 30-Mar-2019
Online since: 2020-05-22T11:43:58Z
Abstract: A protein extract was generated from the macroalga Ulva lactuca, which was subsequently hydrolysed using the food-grade enzyme papain and angiotensin-converting Enzyme I and renin inhibitory peptides identified using a combination of enrichment strategies employing molecular weight cutoff filtration and mass spectrometry analysis. The generated hydrolysates with the most promising in vitro activity were further purified using preparative RP-HPLC and characterised. The 1 kDa hydrolysate (1 kDa-UFH), purified and collected by preparative RP-HPLC at minutes 41-44 (Fr41-44), displayed statistically higher ACE-I inhibitory activities ranging from 96.91% to 98.06%. A total of 48 novel peptides were identified from these four fractions by LC-MS/MS. A simulated gastrointestinal digestion of the identified peptide sequences was carried out using in silico enzyme cleavage simulation tools, resulting in 86 peptide sequences that were further assessed for their potential activity, toxicity and allergenicity using multiple predictive approaches. All the peptides obtained in this study were predicted to be non-toxic. However, 28 out of the 86 novel peptides released after the in silico gastrointestinal digestion were identified as potential allergens. The potential allergenicity of these peptides should be further explored to comply with the current labelling regulations in formulated food products containing U. lactuca protein hydrolysates.
Funding Details: Science Foundation Ireland
Funding Details: The Barrié Foundation in Galicia
Type of material: Journal Article
Publisher: MDPI
Journal: Marine Drugs
Volume: 17
Issue: 4
Copyright (published version): 2019 the Authors
Keywords: HumansUlvaSeaweedOligopeptidesProtein hydrolysatesAntihypertensive agentsAllergensAngiotensin-Converting Enzyme InhibitorsAmino acid sequenceHydrolysisComputer simulation
DOI: 10.3390/md17040204
Language: en
Status of Item: Peer reviewed
ISSN: 1660-3397
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Appears in Collections:Agriculture and Food Science Research Collection
Veterinary Medicine Research Collection

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