Abstract
β-galactosidases (EC.3.2.1.23), which hydrolyze lactose to glucose and galactose, have two main applications in the food industry: the production of low-lactose milk and dairy goods for lactose intolerant people, and the generation of galacto-oligosaccharides by transgalactosylation reactions. Due to their thermostability, β-galactosidases from thermophilic microorganisms are very interesting for industrial processes, as high temperatures can increase the initial productivity of the enzyme, provide higher solubility of substrates, and prevent microbial contamination. In the past, it was necessary to cultivate and grow thermophilic microorganisms to discover novel thermozymes, but the development of metagenomic techniques has allowed researchers to access the genomic potential of uncultivated microbes and their enzymes. The present review gives a brief outline of thermophilic β-galactosidases, with a special focus on those obtained through metagenomics. Additionally, the sequences of β-galactosidases found in some public metagenomes from hot springs were studied and compared to other known thermostable β-galactosidases.
Keywords: β-galactosidase, lactase, metagenomics, thermozymes, thermostable, GOS.
Graphical Abstract
Current Protein & Peptide Science
Title:Heat-Loving β-Galactosidases from Cultured and Uncultured Microorganisms
Volume: 19 Issue: 12
Author(s): Maria-Eugenia DeCastro, Juan-Jose Escuder-Rodriguez, Maria-Esperanza Cerdan, Manuel Becerra, Esther Rodriguez-Belmonte and Maria-Isabel Gonzalez-Siso*
Affiliation:
- Grupo EXPRELA, Centro de Investigacions Científicas Avanzadas (CICA), Departamento de Bioloxia, Facultade de Ciencias, Universidade da Coruna, Campus de A Coruna, 15071 A Coruna,Spain
Keywords: β-galactosidase, lactase, metagenomics, thermozymes, thermostable, GOS.
Abstract: β-galactosidases (EC.3.2.1.23), which hydrolyze lactose to glucose and galactose, have two main applications in the food industry: the production of low-lactose milk and dairy goods for lactose intolerant people, and the generation of galacto-oligosaccharides by transgalactosylation reactions. Due to their thermostability, β-galactosidases from thermophilic microorganisms are very interesting for industrial processes, as high temperatures can increase the initial productivity of the enzyme, provide higher solubility of substrates, and prevent microbial contamination. In the past, it was necessary to cultivate and grow thermophilic microorganisms to discover novel thermozymes, but the development of metagenomic techniques has allowed researchers to access the genomic potential of uncultivated microbes and their enzymes. The present review gives a brief outline of thermophilic β-galactosidases, with a special focus on those obtained through metagenomics. Additionally, the sequences of β-galactosidases found in some public metagenomes from hot springs were studied and compared to other known thermostable β-galactosidases.
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Cite this article as:
DeCastro Maria-Eugenia , Escuder-Rodriguez Juan-Jose , Cerdan Maria-Esperanza , Becerra Manuel , Rodriguez-Belmonte Esther and Gonzalez-Siso Maria-Isabel *, Heat-Loving β-Galactosidases from Cultured and Uncultured Microorganisms, Current Protein & Peptide Science 2018; 19 (12) . https://dx.doi.org/10.2174/1389203719666180809111659
DOI https://dx.doi.org/10.2174/1389203719666180809111659 |
Print ISSN 1389-2037 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5550 |
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