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Proteomics Approach to Differentiate Protein Extraction Methods in Sugar Beet Leaves
Ece Goktayoglu1,2, Mecit Halil Oztop1, Sureyya Ozcan3
1Department of Food Engineering, Middle East Technical University, 06800 Ankara, Turkiye.
Journal of Agricultural and Food Chemistry
|June 5, 2023
Summary
Sugar beet leaves offer a sustainable plant-based protein source. Different extraction methods yield varying protein profiles, impacting final product quality.
Area of Science:
- Food Science
- Biotechnology
- Agricultural Science
Background:
- Growing demand for alternative plant-based protein sources.
- Sugar beet leaves are abundant agricultural waste with high protein potential.
- Valorization of sugar beet leaves can reintegrate them into the food chain.
Purpose of the Study:
- To investigate various protein extraction methods from sugar beet leaves.
- To comprehensively characterize the extracted proteins using mass spectrometry.
- To determine how different extraction techniques influence protein profiles.
Main Methods:
- Protein extraction using isoelectric-point precipitation, heat coagulation, and ammonium-sulfate precipitation.
- Application of high-pressure assistance to isoelectric-point precipitation and heat coagulation methods.
- Mass spectrometry-based proteomic analysis for protein identification and characterization.
Main Results:
- Identification of 817 proteins, the most extensive protein profile for sugar beet leaves to date.
- Comparable total protein content across methods, but significant differences in low-abundance proteins.
- High-pressure-assisted methods enriched for chloroplast-located proteins.
Conclusions:
- Protein extraction and precipitation methods significantly influence the resulting protein profiles from sugar beet leaves.
- The choice of method can impact the physical and nutritional properties of protein products derived from sugar beet leaves.
- This study provides crucial insights for optimizing sugar beet leaf protein extraction for food applications.
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