Abstract
Bread as the main food all over the world is generally based on wheat flour due to its
unique properties to form a three-dimensional gluten network. In fact, the quality of bread is influenced
by wheat gluten quality and quantity. The quality of gluten protein is mainly defined based
on its amino acids composition and bonding (covalent and non-covalent). Gluten protein quality is
considered weak based on its essential amino acid content: lysine and threonine. Covalent crosslinks
as the main factor in determining the integrity of the gluten network are also interrupted by
the activity of proteolytic enzymes and reducing agents. Different treatments (physical, chemical
and enzymatic) are used to alleviate these detrimental effects and improve the bread making quality
of wheat flour. Given that, food industry is looking for using enzymes (respecting their specificity,
ease of use and low risk of toxic products formation) microbial transglutaminase is an efficient
option, considering its ability to introduce new crosslinks. This new crosslink formation can either
improve gluten protein quality in damaged wheat flour or imitate the function of gluten protein in
gluten free bread. The aim of this article is to review the application of microbial transglutaminase
enzyme as an improving agent in wheat bread industry.
Keywords:
Wheat bread, transglutaminase, gluten, enzyme, function, application.
Graphical Abstract
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