Article (Scientific journals)
Physicochemical properties, antioxidant activity and in vitro gastrointestinal digestion of purified proteins from black cumin seeds.
Trigui, Ines; Zarai, Zied; Chevance, Soizic et al.
2019In International Journal of Biological Macromolecules, 126, p. 454-465
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Keywords :
Calorimetry, Differential Scanning; Circular Dichroism; Proton Magnetic Resonance Spectroscopy; Spectrophotometry, Ultraviolet; Spectroscopy, Fourier Transform Infrared; Surface Tension; Antioxidant activity; Black cumin seeds; Functional properties; Purified proteins; Structural properties
Abstract :
[en] The main purpose of this work was to investigate some physiochemical and antioxidant properties of purified proteins of 18 kDa from black cumin seeds. The structural properties of purified proteins were characterized using Fourier Transform-Infrared spectroscopy (FT-IR) and Circular dichroism (CD) spectroscopy analysis. The Tunisian purified protein exhibited a α-helix structure and the Turkish purified protein adopted a β-sheet conformation. The thermal properties were also evaluated by differential scanning calorimetry (DSC). The Tunisian purified protein presented two endothermic peaks, the first one was at 76.71 °C and the second one was at 131.32 °C. However, only one endothermic peak was found for the Turkish purified protein at 157.63 °C. Both Tunisian and Turkish purified proteins were very stable towards heat-induced denaturation. In addition, the effect of pH, salt (NaCl and Na(2)SO(4)) and temperature on functional properties was investigated. The Tunisian black cumin seeds pure protein exhibited better antioxidant activity than that of the Turkish one at all tested concentrations (0.2 to 1 mg/mL) and temperatures (50 °C, 75 °C and 100 °C), as well as after gastrointestinal digestion simulation.
Disciplines :
Food science
Author, co-author :
Trigui, Ines;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, 3038 Sfax, Tunisia. Electronic address: inestrigui89@gmail.com.
Zarai, Zied;  Laboratoire de Biochimie et de Génie Enzymatique des Lipases, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, 3038 Sfax, Tunisia.
Chevance, Soizic;  UMR 6226 CNRS Equipe Ingénierie Chimique et Molécules pour le Vivant, Université de Rennes 1, Institut des Sciences Chimiques de Rennes, Campus Scientifique de Beaulieu, 263 av du Général Leclerc, 35042 Rennes Cedex, France.
Cheikh-Rouhou, Salma;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, 3038 Sfax, Tunisia.
Attia, Hamadi;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, 3038 Sfax, Tunisia.
Ayadi, Mohamed ;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, 3038 Sfax, Tunisia.
Language :
English
Title :
Physicochemical properties, antioxidant activity and in vitro gastrointestinal digestion of purified proteins from black cumin seeds.
Publication date :
01 April 2019
Journal title :
International Journal of Biological Macromolecules
ISSN :
0141-8130
eISSN :
1879-0003
Publisher :
Elsevier, Nl
Volume :
126
Pages :
454-465
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright © 2018. Published by Elsevier B.V.
Available on ORBi :
since 10 December 2024

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