Santos_2023_Heliyon_9_e19921

Reference

Title : Degradation of ochratoxins A and B by lipases: A kinetic study unraveled by molecular modeling - Santos_2023_Heliyon_9_e19921
Author(s) : Santos J , Castro T , Venancio A , Silva C
Ref : Heliyon , 9 :e19921 , 2023
Abstract :

Mycotoxins are toxic substances produced by fungi and, frequently, different mycotoxins cooccur in food commodities. Ochratoxin A (OTA) and Ochratoxin B (OTB) may co-occur in a variety of foods, like red wines and wheat, presenting a significant risk of population exposure. In this study, we investigated the potential of five lipases (Candida rugosa Lipase, Candida antarctica B Lipase, Thermomyces lanuginosus Lipase, Amano Lipase A from Aspergillus niger (ANL) and Porcine Pancreas Lipase (PPL)) to hydrolyze OTA and OTB into non-hazardous products. Only ANL and PPL degraded both substrates, however, with varying degrees of efficiency. PPL completely degraded OTB (9 h), but only 43% of OTA (25 h). Molecular simulations indicated a high binding energy of OTA to PPL, that can be explained by the impact of the chlorine group, impairing hydrolysis. ANL was able to completely degrade both mycotoxins, OTA in 3 h and OTB in 10 h. The ANL enzyme showed also high specificity to OTA, however, the activity of this enzyme is not affected by chlorine and hydrolyzes OTA faster than OTB. These two enzymes were found to be able to detoxify co-occurring ochratoxins A and B, making isolated enzymes an alternative to the direct use of microorganisms for mycotoxin mitigation in food.

PubMedSearch : Santos_2023_Heliyon_9_e19921
PubMedID: 37809625

Related information

Substrate Ochratoxin-A

Citations formats

Santos J, Castro T, Venancio A, Silva C (2023)
Degradation of ochratoxins A and B by lipases: A kinetic study unraveled by molecular modeling
Heliyon 9 :e19921

Santos J, Castro T, Venancio A, Silva C (2023)
Heliyon 9 :e19921