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Protein structural changes during processing of vegetable feed ingredients used in swine diets: implications for
S Salazar-Villanea1, W H Hendriks2, E M A M Bruininx2
11Wageningen UR Livestock Research,Wageningen,The Netherlands.
Nutrition Research Reviews
|July 1, 2016
Summary
Protein structure, particularly beta-sheets, impacts enzyme accessibility and digestibility. Processing can alter protein structures, with outcomes depending on conditions and protein type, affecting nutritional value.
Area of Science:
- Food Science and Technology
- Protein Chemistry
- Nutritional Biochemistry
Background:
- Protein digestibility is crucial for nutritional value and is influenced by protein structure.
- Intramolecular beta-sheets in native proteins are associated with reduced digestibility.
- Processing can induce simultaneous positive (denaturation) and negative (aggregation) structural changes affecting digestibility.
Purpose of the Study:
- To explore the mechanisms by which processing affects protein digestibility.
- To understand how different processing parameters influence protein structural changes.
- To clarify the relationship between protein structure modifications and nutritional outcomes.
Main Methods:
- Review of literature on protein processing and its effects on digestibility.
- Analysis of the impact of processing parameters like heat, moisture, and shear.
- Investigation of protein structural changes, including denaturation, random coil formation, aggregation, and Maillard reactions.
Main Results:
- Processing-induced structural changes have a counterbalancing effect on protein digestibility.
- Heat is a primary driver of protein structural modification during processing.
- The correlation between denaturation enthalpy and digestibility varies by protein source.
Conclusions:
- Understanding the mechanisms of processing-induced structural changes is key to predicting nutritional consequences.
- Processing conditions and protein type are critical determinants of digestibility outcomes.
- Further research is needed to disentangle the effects of multifactorial processing technologies.
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