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Álvarez-Cao ME, Cerdán ME, González-Siso MI, Becerra M. Optimization of Saccharomyces cerevisiae α-galactosidase production and application in the degradation of raffinose family oligosaccharides. Microb Cell Fact 2019; 18:172. [PMID: 31601209 PMCID: PMC6786279 DOI: 10.1186/s12934-019-1222-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 09/29/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND α-Galactosidases are enzymes that act on galactosides present in many vegetables, mainly legumes and cereals, have growing importance with respect to our diet. For this reason, the use of their catalytic activity is of great interest in numerous biotechnological applications, especially those in the food industry directed to the degradation of oligosaccharides derived from raffinose. The aim of this work has been to optimize the recombinant production and further characterization of α-galactosidase of Saccharomyces cerevisiae. RESULTS The MEL1 gene coding for the α-galactosidase of S. cerevisiae (ScAGal) was cloned and expressed in the S. cerevisiae strain BJ3505. Different constructions were designed to obtain the degree of purification necessary for enzymatic characterization and to improve the productive process of the enzyme. ScAGal has greater specificity for the synthetic substrate p-nitrophenyl-α-D-galactopyranoside than for natural substrates, followed by the natural glycosides, melibiose, raffinose and stachyose; it only acts on locust bean gum after prior treatment with β-mannosidase. Furthermore, this enzyme strongly resists proteases, and shows remarkable activation in their presence. Hydrolysis of galactose bonds linked to terminal non-reducing mannose residues of synthetic galactomannan-oligosaccharides confirms that ScAGal belongs to the first group of α-galactosidases, according to substrate specificity. Optimization of culture conditions by the statistical model of Response Surface helped to improve the productivity by up to tenfold when the concentration of the carbon source and the aeration of the culture medium was increased, and up to 20 times to extend the cultivation time to 216 h. CONCLUSIONS ScAGal characteristics and improvement in productivity that have been achieved contribute in making ScAGal a good candidate for application in the elimination of raffinose family oligosaccharides found in many products of the food industry.
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Affiliation(s)
- María-Efigenia Álvarez-Cao
- Departamento de Bioloxía, Facultade de Ciencias, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña. Grupo EXPRELA, A Coruña, Spain
| | - María-Esperanza Cerdán
- Departamento de Bioloxía, Facultade de Ciencias, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña. Grupo EXPRELA, A Coruña, Spain
| | - María-Isabel González-Siso
- Departamento de Bioloxía, Facultade de Ciencias, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña. Grupo EXPRELA, A Coruña, Spain
| | - Manuel Becerra
- Departamento de Bioloxía, Facultade de Ciencias, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña. Grupo EXPRELA, A Coruña, Spain
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Fernández-Leiro R, Pereira-Rodríguez Á, Cerdán ME, Becerra M, Sanz-Aparicio J. Structural analysis of Saccharomyces cerevisiae alpha-galactosidase and its complexes with natural substrates reveals new insights into substrate specificity of GH27 glycosidases. J Biol Chem 2010; 285:28020-33. [PMID: 20592022 PMCID: PMC2934667 DOI: 10.1074/jbc.m110.144584] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2010] [Revised: 06/17/2010] [Indexed: 11/06/2022] Open
Abstract
Alpha-galactosidases catalyze the hydrolysis of terminal alpha-1,6-galactosyl units from galacto-oligosaccharides and polymeric galactomannans. The crystal structures of tetrameric Saccharomyces cerevisiae alpha-galactosidase and its complexes with the substrates melibiose and raffinose have been determined to 1.95, 2.40, and 2.70 A resolution. The monomer folds into a catalytic (alpha/beta)(8) barrel and a C-terminal beta-sandwich domain with unassigned function. This pattern is conserved with other family 27 glycosidases, but this enzyme presents a unique 45-residue insertion in the beta-sandwich domain that folds over the barrel protecting it from the solvent and likely explaining its high stability. The structure of the complexes and the mutational analysis show that oligomerization is a key factor in substrate binding, as the substrates are located in a deep cavity making direct interactions with the adjacent subunit. Furthermore, docking analysis suggests that the supplementary domain could be involved in binding sugar units distal from the scissile bond, therefore ascribing a role in fine-tuning substrate specificity to this domain. It may also have a role in promoting association with the polymeric substrate because of the ordered arrangement that the four domains present in one face of the tetramer. Our analysis extends to other family 27 glycosidases, where some traits regarding specificity and oligomerization can be formulated on the basis of their sequence and the structures available. These results improve our knowledge on the activity of this important family of enzymes and give a deeper insight into the structural features that rule modularity and protein-carbohydrate interactions.
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Affiliation(s)
- Rafael Fernández-Leiro
- From the Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira, s/n 15071-A Coruña and
- the Grupo de Cristalografía Macromolecular y Biología Estructural, Instituto de Química-Física “Rocasolano,” Consejo Superior de Investigaciones Científicas, Serrano 119, 28006 Madrid, Spain
| | - Ángel Pereira-Rodríguez
- From the Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira, s/n 15071-A Coruña and
| | - M. Esperanza Cerdán
- From the Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira, s/n 15071-A Coruña and
| | - Manuel Becerra
- From the Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira, s/n 15071-A Coruña and
| | - Juliana Sanz-Aparicio
- the Grupo de Cristalografía Macromolecular y Biología Estructural, Instituto de Química-Física “Rocasolano,” Consejo Superior de Investigaciones Científicas, Serrano 119, 28006 Madrid, Spain
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Viana PA, de Rezende ST, Passos FML, Oliveira JS, Teixeira KN, Santos AMC, Bemquerer MP, Rosa JC, Santoro MM, Guimarães VM. Debaryomyces hansenii UFV-1 Intracellular α-Galactosidase Characterization and Comparative Studies with the Extracellular Enzyme. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:2515-22. [PMID: 19226141 DOI: 10.1021/jf8030919] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pollyanna A. Viana
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Sebastião T. de Rezende
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Flávia Maria Lopes Passos
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Jamil S. Oliveira
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Kádima N. Teixeira
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Alexandre M. C. Santos
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Marcelo P. Bemquerer
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - José C. Rosa
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Marcelo M. Santoro
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Valéria M. Guimarães
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil, EMBRAPA Recursos Genéticos e Biotecnologia, PqEB, Brasília, DF, Brazil, and Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
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