Towards Celiac-safe foods: Decreasing the affinity of transglutaminase 2 for gliadin by addition of ascorbyl palmitate and ZnCl2 as detoxifiers

Dublin Core

Title

Towards Celiac-safe foods: Decreasing the affinity of transglutaminase 2 for gliadin by addition of ascorbyl palmitate and ZnCl2 as detoxifiers

Subject

ALIMENTOS
ALIMENTOS PARA CELIACOS
BIBLIOGRAFIA NACIONAL QUIMICA
2017

Abstract

Initiation of celiac disease is triggered in the gastrointestinal tract by transglutaminase 2 (TG2) assisted deamidation of gluten peptides. Deamidation is a side-reaction to transamidation and occurs if primary amines are absent. In contrast to deamidation, transamidation does not trigger an immune response. The aim of the study was to identify a suitable food additive that interacts with TG2 binding motives in gluten-derived peptides to prevent deamidation/transamidation. Homology modelling of α2-gliadin and computational screening of compounds for their binding affinity to a common TG2 binding motive (P)QLP were done by using computational approaches followed by experimental testing of TG2 activity. A database containing 1174 potential food grade ligands was screened against the model of α2-gliadin (27 out of 33 aa). Out of the five best ligands, ascorbyl palmitate, was observed to decrease TG2 transamidation of gliadin by 82% ± 2%. To completely silence the transamidation, we added zinc chloride (ZnCl2), and thereby reached a 99% ± 1% inhibition of TG2 activity. In addition, we conducted a pilot experiment in which ascorbyl palmitate was observed to decrease TG2 deamidation of gliadin completely. We propose ascorbyl palmitate in combination with ZnCl2 with the future perspective to become an additive in celiac-safe foods.

Creator

Engstrom, N.
Scheers, J.
Scheers, N.

Source

Scientific Reports |g v. 7, no. 1, 2017. -- 8p.--e77

Publisher

Nature

Date

2017

Rights

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Format

PDF

Language

Inglés

Type

Artículo

Identifier

DOI: 10.1038/s41598-017-00174-z.

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Original Format

PDF
Date Added
April 12, 2018
Collection
Bibliografía Nacional Química
Item Type
Document
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Citation
Engstrom, N. et al., “Towards Celiac-safe foods: Decreasing the affinity of transglutaminase 2 for gliadin by addition of ascorbyl palmitate and ZnCl2 as detoxifiers,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed November 17, 2025, https://riquim.fq.edu.uy/items/show/4924.