Projects per year
Abstract
We investigated the role of the interfacial properties of ten synthetic potato peptides (previously identified by bioinformatics) to physically and oxidatively stabilize 5 wt% fish oil-in-water emulsions (pH 7). Peptides α10, α12, γ1, γ75 and γ76 adopted a predominantly α-helical conformation (48–57%) at the interface leading to poor inter-peptides interactions as well as weak and stretchable interfaces (E d ∗<12mN/m). Peptides β22, β27, γ36 and γ38 displayed a significantly higher degree of interfacial inter-peptide interaction, resulting in stiff and solid-like interfaces (E d ∗=35−45mN/m). β22 and γ36 peptides re-arranged at the interface adopting a highly β-strand structure (63–65%). Emulsions stabilized with all peptides showed high physical stability during one week (D 3,2 at day 1 = 0.134–0.175 μm), except from the ones stabilized with β27 that had creaming after day 1, or β22 that destabilized during storage. Emulsions stabilized with peptides exhibiting negative surface charge at pH 7 (α12, β22, γ1, γ75, γ76, γ36 and γ40) (zeta potential: −50.9 to −69.5 mV) showed the lowest oxidative stability due to the attraction of cationic metal ions that catalyzed lipid oxidation. In contrast, emulsions stabilized with peptides having positive surface charge at pH 7 (α10, β27 and γ38) (zeta potential: 11.6–42.8 mV) showed high oxidative stability (i.e., by repulsion of cationic metal ions), independently of the peptide length, secondary structure at the interface, or viscoelasticity of the interfacial layer. Hence, this work advances our understanding of the relation between interfacial properties of peptide layers and the physicochemical stability of emulsions.
Original language | English |
---|---|
Article number | 106605 |
Journal | Food Hydrocolloids |
Volume | 115 |
Number of pages | 13 |
ISSN | 0268-005X |
DOIs | |
Publication status | Published - Jun 2021 |
Keywords
- Dilatational surface rheology
- Lipid oxidation
- Omega-3
- Peptide emulsifiers
- Physical stability
- Synchrotron radiation circular dichroism
Fingerprint
Dive into the research topics of 'The structure, viscoelasticity and charge of potato peptides adsorbed at the oil-water interface determine the physicochemical stability of fish oil-in-water emulsions'. Together they form a unique fingerprint.Projects
- 1 Finished
-
PROVIDE: Protein valorization through informatics, hydrolysis, and separation
Gregersen, S., Overgaard, M. T., Hansen, E. B., Bang-Berthelsen, I., Jacobsen, C., García Moreno, P. J., Marcatili, P. & Yesiltas, B.
01/09/2017 → 30/12/2022
Project: Research
Activities
- 1 Talks and presentations in private or public companies
-
PROVIDE and the Potatoes
Simon Gregersen (Lecturer)
10 Feb 2021Activity: Talks and presentations › Talks and presentations in private or public companies
-
Emulsifier peptides derived from seaweed, methanotrophic bacteria, and potato proteins identified by quantitative proteomics and bioinformatics
Yesiltas, B., Gregersen Echers, S., Lægsgaard, L., Brinch, M. L., Olsen, T. H., Marcatili, P., Overgaard, M. T., Hansen, E. B., Jacobsen, C. & García-Moreno, P. J., 15 Nov 2021, In: Food Chemistry. 362, 12 p., 130217.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile22 Citations (Scopus)39 Downloads (Pure) -
Emulsifying peptides from potato protein predicted by bioinformatics: Stabilization of fish oil-in-water emulsions
García-Moreno, P. J., Jacobsen, C., Marcatili, P., Gregersen Echers, S., Overgaard, M. T., Andersen, M. L., Sørensen, A. D. M. & Hansen, E. B., Apr 2020, In: Food Hydrocolloids. 101, 105529.Research output: Contribution to journal › Journal article › Research › peer-review
Open Access47 Citations (Scopus) -
Identification of emulsifier potato peptides by bioinformatics: application to omega-3 delivery emulsions and release from potato industry side streams
García Moreno, P. J., Gregersen Echers, S., Nedamani, E., Olsen, T. H., Marcatili, P., Overgaard, M. T., Andersen, M. L., Hansen, E. B. & Jacobsen, C., 20 Jan 2020, In: Scientific Reports. 10, 1, 22 p., 690.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile43 Citations (Scopus)53 Downloads (Pure)