Functional Properties of Lupin Seed Proteins
Summary
Lupin seed proteins are increasingly valued as versatile ingredients in food systems owing to their high protein content, favourable amino acid composition and sustainable cultivation profile. Key functional attributes include solubility across a range of pH values, gelation upon heating, emulsification in oil-in-water systems and foam formation for aerated products. These properties arise from the molecular characteristics of the major globulins (α- and β-conglutins), whose tertiary and quaternary structures respond dynamically to environmental conditions. Modulation of solubility and surface activity by pH adjustment, enzymatic treatment or physical processing can enhance gel strength, emulsion stability and foam resilience. Such adaptability underpins applications from meat analogues and dairy alternatives to bakery and confectionery. Moreover, advances in extraction and fractionation aim to preserve functional integrity while minimising antinutritional factors. Collectively, the expanding understanding of lupin protein technofunctionality supports the development of clean-label, plant-based foods with desirable texture, mouthfeel and nutritional value.
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Functional Properties of Lupin Seed Proteins publication trend
The graph below shows the total number of articles in functional properties of lupin seed proteins across all publications each year (not limited to Nature Index journals).
Technical terms
Protein isolate: A concentrated protein fraction obtained by removing non-protein components, used to standardise functional performance.
Interfacial properties: Characteristics governing protein adsorption and film formation at oil–water or air–water interfaces, critical for emulsification and foaming.
Foam overrun: The percentage increase in volume due to aeration, indicating the capacity to incorporate and stabilise air in a liquid phase.
Solubility: The extent to which proteins dissolve in a given medium, influencing clarity, viscosity and ease of incorporation into formulations.
Gelation: The process by which proteins aggregate into a three-dimensional network upon heating or pH adjustment, imparting firmness and sliceability.
References
- Interfacial and foaming properties of soluble lupin protein isolates: Effect of pH. Food Hydrocolloids (2024).
- Protein extraction from lupin (Lupinus angustifolius L.) using combined ultrasound and microwave techniques: Impact on protein recovery, structure, and functional properties. Ultrasonics Sonochemistry (2025).
- Techno-Functional, Nutritional and Environmental Performance of Protein Isolates from Blue Lupin and White Lupin. Foods (2020).
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