Academic Journal

Biochemical characterization of a novel ochratoxin A-detoxifying amidohydrolase from Terribacillus saccharophilus JX-8 and its application in grape juice and wheat flour.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Biochemical characterization of a novel ochratoxin A-detoxifying amidohydrolase from Terribacillus saccharophilus JX-8 and its application in grape juice and wheat flour.
Συγγραφείς: Liu B; College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi 330022, China., Xiong M; College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi 330022, China., Sun W; College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi 330022, China., Wu H; College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi 330022, China., Li J; College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi 330022, China., Wang Y; College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi 330022, China., Wang Q; College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi 330022, China., He J; Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China. Electronic address: hejian@njau.edu.cn., Chen X; College of Life Sciences, Jiangxi Normal University, Nanchang, Jiangxi 330022, China. Electronic address: xuelanchen162@163.com.
Πηγή: Food research international (Ottawa, Ont.) [Food Res Int] 2026 Aug 01; Vol. 237, pp. 119366. Date of Electronic Publication: 2026 Apr 30.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Published on behalf of the Canadian Institute of Food Science and Technology by Elsevier Applied Science Country of Publication: Canada NLM ID: 9210143 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-7145 (Electronic) Linking ISSN: 09639969 NLM ISO Abbreviation: Food Res Int Subsets: MEDLINE
Imprint Name(s): Original Publication: Ottawa, Ontario, Canada : Published on behalf of the Canadian Institute of Food Science and Technology by Elsevier Applied Science, c1992-
Ιατρικοί όροι (MeSH): Ochratoxins*/metabolism , Vitis*/chemistry , Vitis*/microbiology , Fruit and Vegetable Juices*/microbiology , Fruit and Vegetable Juices*/analysis , Triticum*/chemistry , Triticum*/microbiology , Flour*/analysis , Flour*/microbiology , Amidohydrolases*/metabolism , Amidohydrolases*/chemistry , Bacillaceae*/enzymology, Food Contamination/prevention & control ; Food Contamination/analysis ; Food Microbiology
Περίληψη: Ochratoxin A (OTA) is a widespread mycotoxin contaminating cereals, grape products, coffee, and spices, threatening global food safety and human health. Efficient detoxification strategies are therefore urgently needed. Herein, an OTA-degrading bacterium, Terribacillus saccharophilus JX-8, was isolated from Chinese sauerkraut juice, which completely degraded 12.4 μM OTA within 12 h via amide bond hydrolysis to yield non-toxic ochratoxin α (OTα). A novel OTA amidohydrolase OtaH was identified, sharing only 33%-42% sequence identity with previously characterized homologs. OtaH exhibited high catalytic efficiency (kcat/Km = 4028.57 mM-1 min-1) and remarkable thermostability, retaining >50% activity after incubation at 65 °C for 1 h. Moreover, 5 μg/mL OtaH achieved 64.9% and 94.6% degradation of OTA in grape juice and wheat flour, respectively, within 2 h at 25 °C, reducing residual OTA to 1.76 μg/L and 0.54 μg/kg. Notably, enzymatic treatment did not significantly alter pH, soluble solids content, titratable acidity, polyphenol content, or nutritional composition. This study provides a promising enzymatic strategy for OTA detoxification in food processing.
(Copyright © 2026 Elsevier Ltd. All rights reserved.)
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Contributed Indexing: Keywords: Amidohydrolase; Biodegradation; Grape juice; Ochratoxin A; Terribacillus saccharophilus; Wheat flour
Substance Nomenclature: 0 (Ochratoxins)
1779SX6LUY (ochratoxin A)
EC 3.5.- (Amidohydrolases)
Entry Date(s): Date Created: 20260522 Date Completed: 20260717 Latest Revision: 20260717
Update Code: 20260717
DOI: 10.1016/j.foodres.2026.119366
PMID: 42169328
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1873-7145
DOI:10.1016/j.foodres.2026.119366