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Biochimica et biophysica acta. Proteins and proteomics

Biochimica et biophysica acta. Proteins and proteomics

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Conventional and non-conventional applications of β-galactosidases

Published:1 January 2020 DOI: 10.1016/j.bbapap.2019.140271
Carlos Vera , Cecilia Guerrero , Carla Aburto , Andrés Cordova , Andrés Illanes

Abstract

β-Galactosidase is one of the most important industrial enzymes, that has been used for many decades in the dairy industry. The main application of β-galactosidase is related to the production of low-lactose and lactose-free milk and dairy products, which are now common consumer goods in supermarket shelves. This is a well-established market that is expected to keep on growing as these products become more accessible to mid-income people worldwide. However, a fresh air has come into the β-galactosidase business as non-conventional applications arose in recent decades based on its transgalactosylation activity. This capacity is certainly a major asset for a commodity enzyme that can be used now as a catalyst for the upgrading of readily available and cheap lactose into high added-value glycosides in processes of organic synthesis in tune with green chemistry principles within the framework of sustainability. This is a reflection of a paradigm shift, where enzymes are now being considered as apt catalysts for the synthesis of valuable organic compounds. This article reviews the main applications of β-galactosidase, going from its conventional use related to its hydrolytic activity to the ongoing non-conventional applications in the synthesis of high added-value oligosaccharides based on its transgalactosylation activity.

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