Vilmara Albuquerque de Farias , Rodolpho Glauber Guedes Silva , Andréa Santos Costa , Amanda Dias da Rocha Lima , Bruno Coêlho Cavalcanti , Manoel Odorico de Moraes Filho , Hermógenes David de Oliveira
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Enzymatic hydrolysis of wheat gluten employing cysteine proteases from noni fruits (Morinda citrifolia L.)
Previous reports have shown that noni (Morinda citrifolia L.) puree extract (NPE) is a promising source of cysteine peptidases with potential applications in the food industry. This study expanded the applications of cysteine peptidases from noni fruit by analyzing their potential for wheat gluten hydrolysis and assessing their in vitro toxicity as a new food ingredient. NPE cysteine proteases hydrolyze both gliadins and glutenins, reaching a degree of hydrolysis of 24.40% and 31.78%, respectively. In addition, they reduced gliadin content by 96.80% after 4 h of incubation, as displayed by the R5 ELISA test kit for detecting gliadin based on the monoclonal antibody R5. The chromatographic fractionation of NPE cysteine proteases on a cation exchange column (Source 30S) resulted in an unretained peak (P1) and a retained peak (P2), which showed proteolytic activity with different electrophoretic and zymographic profiles. P1 and P2 had similar (p < 0.05) degrees of hydrolysis for gliadins (approximately 9%). P1 performed better (10.68%) than P2 (8.55%) for glutenins. NPE cysteine proteases did not exhibit genotoxicity or cytotoxicity against mouse fibroblasts (L929 cell line). These findings suggest that NPE cysteine proteases have potential for use as novel ingredients to produce gluten-free foods.
期刊介绍:
The Journal of Cereal Science was established in 1983 to provide an International forum for the publication of original research papers of high standing covering all aspects of cereal science related to the functional and nutritional quality of cereal grains (true cereals - members of the Poaceae family and starchy pseudocereals - members of the Amaranthaceae, Chenopodiaceae and Polygonaceae families) and their products, in relation to the cereals used. The journal also publishes concise and critical review articles appraising the status and future directions of specific areas of cereal science and short communications that present news of important advances in research. The journal aims at topicality and at providing comprehensive coverage of progress in the field.