Food Chemistry: X (Dec 2024)

Effect of legume proteins on the structure and digestibility of wheat starch-lauric acid complexes

  • Jing Zhou,
  • Shuang-yi Zheng,
  • Qian-qian Chen,
  • Xiao Wan,
  • Jing Du,
  • Wen-ping Ding,
  • Xue-dong Wang,
  • Hai-long Zhang

Journal volume & issue
Vol. 24
p. 101891

Abstract

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The effect of legume proteins (soy protein (SP), chickpea protein (CP) and peanut protein (PP)) on the properties of wheat starch-lauric acid (WS-LA) system and its intrinsic mechanism were investigated. RVA, digestion experiment and TGA results showed that legume proteins prompted the viscosity peak formation during cooling stage and increased anti-digestion and thermal stability of WS-LA system. FT-IR, Raman, XRD and 13C NMR results indicated that legume proteins improved the long-range and short-range ordering degree and single-helix structure of WS-LA system. SP had greater influence on the properties of WS-LA system than that of CP and PP. Proteins with high solubility, emulsifying properties and β-sheet content were conducive to starch-based complexes formation. Molecular dynamics simulation results indicated that major forces for WS-LA-SP formation were hydrogen bonding and van der Waals forces. This study offered crucial information on starch-fatty acid-protein complexes formation for proteins selection in starch-based products development.

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