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Published 2019

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Publication details

Journal : Journal of Agricultural and Food Chemistry , vol. 67 , p. 11025–11034 , 2019

Publisher : American Chemical Society (ACS)

International Standard Numbers :
Printed : 0021-8561
Electronic : 1520-5118

Publication type : Academic article

Contributors : Koga, Shiori; Rieder, Anne; Ballance, Simon; Uhlen, Anne Kjersti; Veiseth-Kent, Eva

Issue : 40

If you have questions about the publication, you may contact Nofima’s Chief Librarian.

Kjetil Aune
Chief Librarian
kjetil.aune@nofima.no

Summary

Recently, we have observed a relationship between poor breadmaking quality and protease activities 6 related to fungal infection. This study aims to identify potential gluten-degrading proteases secreted by 7 fungi and to analyse effects of these proteases on rheological properties of dough and gluten. Fusarium 8 graminearum infected grain was used as a model system. Zymography showed that serine-type 9 proteases secreted by F. graminearum degrade gluten proteins. Zymography followed by LC-MS/MS 10 analyses predicted one serine carboxypeptidase and seven serine endo-peptidases to be candidate fungal 11 proteases involved in gluten degradation. Effects of fungal proteases on the time-dependent rheological 12 properties of dough and gluten were analysed by small amplitude oscillatory shear rheology and large 13 deformation extensional rheology. Our results indicate that fungal proteases degrade gluten proteins not 14 only in the grain itself, but also during dough preparation and resting. Our study gives new insight into 15 fungal proteases and their potential role in weakening of gluten.

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