Dual regulations on texture and water mobility of shrimp surimi gel with sustained-release epigallocatechin-3-gallate in γ-cyclodextrin metal organic frameworks: Insights into functionality and mechanisms

Food Res Int. 2023 Dec;174(Pt 1):113522. doi: 10.1016/j.foodres.2023.113522. Epub 2023 Sep 27.

Abstract

Epigallocatechin-3-gallate (EGCG) could demonstrate crosslinking effects on myofibrillar proteins, yet its proneness to self-aggregation could bring excessive crosslinking and water loss within gels, hindering its application as an additive during thermal gelation process. Here, encapsulation with the γ-cyclodextrin metal organic framework (γ-CD-MOF) before the use of EGCG was found to play a dual role: alleviating over-crosslinking of proteins and elevating water retention within gels. Results showed that EGCG got a sustainable release throughout the thermal process due to the gradual fracture of O-K coordinate bounds and structural collapse of γ-CD-MOF. Mechanism insights revealed that the use of EGCG loaded γ-CD-MOF (EGCG@γ-CD-MOF) could regulate formation efficiency on disulfide bounds and promote protonation transition of the amino groups in proteins. Moreover, EGCG@γ-CD-MOF brought a higher retention of phenols within gels through preventing oxidative transformation of phenols towards quinones, which were verified to display a higher affinity towards myosin via molecular calculations.

Keywords: Cross-linkage; Epigallocatechin-3-gallate; Food processing; Gelation; Litopenaeus vannamei; Microstructure; Molecular docking; Shrimp surimi; Texture properties.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Delayed-Action Preparations
  • Gels / chemistry
  • Metal-Organic Frameworks*
  • Phenols
  • Water
  • gamma-Cyclodextrins*

Substances

  • gamma-Cyclodextrins
  • Metal-Organic Frameworks
  • epigallocatechin gallate
  • Water
  • Delayed-Action Preparations
  • Phenols
  • Gels