Alkali-Induced Phenolic Acid Oxidation Enhanced Gelation of Ginkgo Seed Protein

Overview

Journal Foods

Specialty Biotechnology

Date 2023 Apr 13

PMID 37048327

Authors

Wei Zhang

Changqi Liu

Jing Zhao

Fengxian Guo

JieYu You

Luyan Zhang

Yaosong Wang

Affiliations

Soon will be listed here.

Abstract

The effect of alkali-induced oxidation of three phenolic acids, namely gallic acid, epigallocatechin gallate, and tannic acid, on the structure and gelation of ginkgo seed protein isolate (GSPI) was investigated. A mixture of 12% () GSPI and different concentrations of alkali-treated phenolic acids (0, 0.06, 0.24, and 0.48% ) were heated at 90 °C, pH 6.0, for 30 min to form composite gels. The phenolic treatment decreased the hydrophobicity of the GSPI sol while enhancing their rheological properties. Despite a reduced protein solubility, water holding capacity, stiffness, and viscoelasticity of the gels were improved by the treatments. Among them, the modification effect of 0.24% () EGCG was the most prominent. Through the analysis of microstructure and composition, it was found to be due to the covalent addition, disulfide bond formation, etc., between the quinone derivatives of phenolic acids and the side chains of nucleophilic amino acids. Phenolic acid modification of GSPI may be a potential ingredient strategy in its processing.

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