JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

Volume 26 Issue 6
December 2025
Article Contents
ZONG Wei, GAO Wenyu, LI Shunfeng, et al. Research progress on catalytic regulation of γ-glutamyl transpeptidase and its application in food processing[J]. Journal of Light Industry, 2025, 40(6): 1-12. doi: 10.12187/2025.06.001
Citation: ZONG Wei, GAO Wenyu, LI Shunfeng, et al. Research progress on catalytic regulation of γ-glutamyl transpeptidase and its application in food processing[J]. Journal of Light Industry, 2025, 40(6): 1-12. doi: 10.12187/2025.06.001 shu

Research progress on catalytic regulation of γ-glutamyl transpeptidase and its application in food processing

  • Corresponding author: ZHANG Lihua, zhanglihua82828@163.com
  • Received Date: 2025-01-08
    Accepted Date: 2025-04-09
    Available Online: 2025-12-15
  • γ-glutamyl transpeptidase (GGT, EC 2.3.2.2) is a pivotal enzyme that catalyzes γ-glutamyl group transfer and hydrolysis reactions, playing a critical role in bioactive substance synthesis and food flavor modulation. Against the backdrop of national salt reduction policies, GGT enhances the bioavailability of natural umami compounds, offering innovative solutions for "salt reduction without compromising flavor" in the food industry. This review systematically examines GGT’s sources, catalytic mechanisms, preparation methods, enzymatic characteristics, molecular modification strategies, and immobilization techniques, along with its current applications in food processing.GGT exhibits broad distribution across animal, plant, and microbial sources. Its catalytic mechanism adheres to the "ping-pong" model, generating γ-glutamyl peptides via acylation-deacylation reactions that synergistically enhance saltiness perception and umami intensity. Molecular modification and immobilization techniques significantly improve GGT’s catalytic efficiency, stability (thermal and pH stability), and recyclability. In food processing, GGT has been successfully applied in soy sauce umami enhancement, flavor compound synthesis, and low-salt meat product flavor optimization. However, large-scale implementation faces challenges including low microbial enzyme production yields and high immobilization carrier costs. Future studies should focus on: Exploring GGT’s application potential, engineering high-yield microbial strains and developing efficient immobilized catalysts, and establishing metabolomics-based flavor modulation models to fully realize GGT’s potential in sustainable food processing and quality enhancement.
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