Cited by 269Seaweed-derived Bioactive CompoundsFood and Agricultural SciencesProteins in Food Systems

Extraction of Proteins from Two Marine Macroalgae, Ulva Sp. and Gracilaria Sp., for Food Application, and Evaluating Digestibility, Amino Acid Composition and Antioxidant Properties of the Protein Concentrates

Kazir, Meital, Abuhassira, Yarden, Robin, Arthur, Nahor, Omri, Luo, Jincheng, Israel, Alvaro, Golberg, Alexander, Livney, Yoav D.·2019·Food Hydrocolloids

Abstract

With rising global population and decreasing available land and fresh water resources, the oceans provide an attractive domain for sourcing nutrients. The marine macroalgae Ulva sp. and Gracilaria sp. are candidate raw biomass. Ulva sp. has high growth rate and Gracilaria sp. has high protein content and their seasonal growth is complementary, allowing almost year-round high yield protein production. In this study, we aimed at developing an effective process, to yield a high macroalgae protein content concentrate suitable for food application, and studying the digestibility, amino acid composition and antioxidant properties of the obtained algal protein concentrates (APCs). We developed a new protein extraction protocol, and compared it to several published protocols. The developed protocol is food-grade, and yielded APC from Ulva and form Gracilaria, containing 70 and 86% protein respectively. The amino acid compositions of the APCs suggest their possible use as sources of essential amino acids. Simulated gastro-intestinal digestion showed that APCs proteolysis of at least 89% can be reached. We found that the APCs exhibit antioxidant activity, which is similar to that of known protein isolates in the hydrogen atom transfer mechanism, but 10 to 20 times higher in the single electron transfer mechanism. These results suggest that polyphenolic compounds might be still present in the APCs and contribute to their antioxidant activity. Our results suggest that the protein concentrates extracted from Ulva sp. and Gracilaria sp. seem to be promising sustainable sources for human nutrition thanks to their essential amino acids content, digestibility and antioxidant properties.

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Crossref · 10.1016/j.foodhyd.2018.07.047

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Authors
Kazir, M., Abuhassira, Y., Robin, A., Nahor, O., Luo, J., Israel, A., Golberg, A., & Livney, Y. D.
Affiliations
  • Technion – Israel Institute of Technology (IL)
  • Tel Aviv University (IL)
  • Israel Oceanographic and Limnological Research (IL)
Corresponding author
Livney, Yoav D.
Venue
Food Hydrocolloids
Publisher
Elsevier BV
Published
2019-02
Volume
87
Pages
194-203
ISSN
0268-005X (ISSN-L)
OpenAlex
W2885868919
Cited by
269
References
90
Citations by year
2026: 22 · 2025: 35 · 2024: 51 · 2023: 29 · 2022: 51 · 2021: 39 · 2020: 24 · 2019: 16 · 2018: 2
FWCI
20.29
Type
journal article
Language
en
Open access
closed
Locations
Food Hydrocolloids (publishedVersion)
Funders
Israel Ministry of Health (#3-00000-12788)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Proteins in Food Systems
Keywords
seaweed, Ulva, Gracilaria, protein extraction, protein digestibility, amino acid composition, antioxidant activity, in vitro digestion, polyphenols, essential amino acids, sustainable nutrition

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