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Study on the induced polymeric protein aggregation and immunoreactivity in biscuits enriched with peanut flour
Mariacinzia Rutigliano1, Maria Teresa Liberatore1, Flavia Dilucia1
1Department of Sciences of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Via Napoli, 25, 71122, Foggia, Italy.
Food Chemistry
|July 25, 2024
Summary
Adding roasted peanut flour to biscuits alters protein aggregation and extractability. Higher peanut flour content, especially 20%, leads to larger protein aggregates with specific bond types, potentially impacting allergenicity.
Area of Science:
- Food Science
- Protein Chemistry
- Allergen Research
Background:
- Biscuits are a common food product where ingredient interactions significantly affect final properties.
- Understanding protein behavior in composite flour systems is crucial for product development and allergen management.
- Roasted peanut flour introduces unique proteins and affects gluten network formation.
Purpose of the Study:
- To investigate the impact of varying roasted peanut flour percentages on protein extractability in biscuits.
- To analyze how peanut flour affects protein aggregation and molecular organization within the biscuit matrix.
- To assess the role of different buffer solutions in characterizing these protein changes.
Main Methods:
- Formulation of biscuits with different percentages of roasted peanut flour.
- Assessment of protein extractability using two distinct buffer systems.
- Analysis of protein aggregation and molecular weight distribution.
- Characterization of protein bond types (hydrophobic, reducible covalent bonds).
Main Results:
- The addition of roasted peanut flour influenced gluten network arrangement and protein organization.
- Protein extractability was significantly affected by peanut flour content.
- Higher molecular weight protein aggregates increased, particularly with 20% peanut flour inclusion.
- These aggregates exhibited hydrophobic and reducible covalent bonds, evidenced by buffer-dependent extractability.
Conclusions:
- Roasted peanut flour induces supramolecular protein organization in biscuits.
- These structural changes may influence the immunoreactivity of major peanut allergens.
- Further research is needed to fully elucidate the implications for food safety and product quality.
