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Sancheti A, Thompson ER, Ju LK. Factors influencing the enzymatic hydrolysis of soy molasses into fermentation feedstock. Enzyme Microb Technol 2023; 170:110302. [PMID: 37591088 DOI: 10.1016/j.enzmictec.2023.110302] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/19/2023]
Abstract
Soybean processing generates huge amounts of soy molasses that can support biorefinery but require development of waste-to-value conversion technologies. Here, soy molasses processing by Aspergillus niger enzymes was studied to optimize the conversion of oligosaccharides to monomeric sugars as ready fermentation feedstock. The effects of pH and temperature were first investigated using fixed enzyme composition and loading. pH, in the tested 3.0-6.5 range, significantly affected hydrolysis particularly in galactose release. The hydrolysis was fastest at pH 4.8 and 60 °C although the 48-h sugar (glucose, fructose, and galactose) yields were similar at pH 4.8 and 5.7, and 50 and 60 °C. Study was next made at these favorable pH and temperatures using different enzyme compositions and loadings. Glucose and fructose were effectively released, reaching ∼100 % yields in 24-48 h by most of the enzymes and loadings evaluated. Galactose production was less effective and varied significantly with the pH-temperature condition and enzyme loading and composition. Mechanistic evaluation suggested formation and accumulation of galactose disaccharide, whose slow hydrolysis was rate-limiting in the systems with complete glucose and fructose releases but low galactose yields. Model equations were developed to describe the kinetic sugar-release profiles and make technoeconomic analysis, which showed that a process of lower enzyme loading, while requiring longer duration, is more economical within the analyzed range of 5-50 (U α-galactosidase/g molasses). With 5 (U/g) loading, the total cost is about 30 % lower at 60 °C-pH 5.7 than 50 °C-pH 4.8. The α-galactosidase-to-sucrase ratio plays a less significant role in affecting the overall process cost.
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Affiliation(s)
- Ashwin Sancheti
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, OH, USA.
| | | | - Lu-Kwang Ju
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Akron, OH, USA.
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Çalcı E, Önal S. Comparative affinity immobilization of α-galactosidase on chitosan functionalized with Concanavalin A and its useability for the hydrolysis of raffinose. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Tolerability to non-endosomal, micron-scale cell penetration probed with magnetic particles. Colloids Surf B Biointerfaces 2021; 208:112123. [PMID: 34571468 DOI: 10.1016/j.colsurfb.2021.112123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 09/11/2021] [Accepted: 09/16/2021] [Indexed: 11/20/2022]
Abstract
The capability of HeLa cells to internalize large spherical microparticles has been evaluated by using inorganic, magnetic microparticles of 1 and 2.8 µm of diameter. In both absence but especially under the action of a magnet, both types of particles were uptaken, in absence of cytotoxicity, by a significant percentage of cells, in a non-endosomal process clearly favored by the magnetic field. The engulfed particles efficiently drive inside the cells chemically associated proteins such as GFP and human alpha-galactosidase A, without any apparent loss of protein functionalities. While 1 µm particles are completely engulfed, at least a fraction of 2.8 µm particles remain embedded into the cell membrane, with only a fraction of their surface in cytoplasmic contact. The detected tolerance to endosomal-independent cell penetration of microscale objects is not then restricted to organic, soft materials (such as bacterial inclusion bodies) as previously described, but it is a more general phenomenon also applicable to inorganic materials. In this scenario, the use of magnetic particles in combination with external magnetic fields can represent a significant improvement in the internalization efficiency of such agents optimized as drug carriers. This fact offers a wide potential in the design and engineering of novel particulate vehicles for therapeutic, diagnostic and theragnostic applications.
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Angulo M, Reyes-Becerril M, Medina-Córdova N, Tovar-Ramírez D, Angulo C. Probiotic and nutritional effects of Debaryomyces hansenii on animals. Appl Microbiol Biotechnol 2020; 104:7689-7699. [PMID: 32686006 DOI: 10.1007/s00253-020-10780-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 07/01/2020] [Accepted: 07/07/2020] [Indexed: 02/06/2023]
Abstract
Debaryomyces hansenii comes of age as a new potential probiotic for terrestrial and aquatic animals. Probiotic properties, including inmunostimulatory effects, gut microbiota modulation, enhanced cell proliferation and differentiation, and digestive function improvements have been related to the oral delivery of D. hansenii. Its functional compounds, such as cell wall components and polyamines, have been identified and implicated in its immunomodulatory activity. In addition, in vitro studies using immune cells have shown standpoints on the possible recognition, regulation, and effector immune mechanisms stimulated by this yeast. This review describes historic, cutting-edge research findings, implications, and perspectives on the use of D. hansenii as a promising probiotic for animals. KEY POINTS: • Debaryomyces hansenii has probiotic effects in terrestrial and aquatic animals. • Nutritional effects could be associated to probiotic D. hansenii strains. • β-D-Glucan and polyamines from D. hansenii are associated to probiotic properties. • Adoption by the industry is expected in the next years.
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Affiliation(s)
- Miriam Angulo
- Immunology & Vaccinology Group, Centro de Investigaciones Biológicas del Noroeste, SC, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S., C.P. 23096, Mexico
| | - Martha Reyes-Becerril
- Immunology & Vaccinology Group, Centro de Investigaciones Biológicas del Noroeste, SC, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S., C.P. 23096, Mexico
| | - Noe Medina-Córdova
- Immunology & Vaccinology Group, Centro de Investigaciones Biológicas del Noroeste, SC, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S., C.P. 23096, Mexico
- Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Campo Experimental Todos Santos, Agricultura s/n entre México y Durango, Emiliano Zapata, La Paz, B.C.S., C.P: 23070, Mexico
| | - Dariel Tovar-Ramírez
- Immunology & Vaccinology Group, Centro de Investigaciones Biológicas del Noroeste, SC, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S., C.P. 23096, Mexico
| | - Carlos Angulo
- Immunology & Vaccinology Group, Centro de Investigaciones Biológicas del Noroeste, SC, Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S., C.P. 23096, Mexico.
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Bioprocess for hydrolysis of galacto-oligosaccharides in soy molasses and tofu whey by recombinant Pseudomonas chlororaphis. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101529] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Panwar D, Shubhashini A, Chaudhari SR, Prashanth KVH, Kapoor M. GH36 α-galactosidase from Lactobacillus plantarum WCFS1 synthesize Gal-α-1,6 linked prebiotic α-galactooligosaccharide by transglycosylation. Int J Biol Macromol 2019; 144:334-342. [PMID: 31816385 DOI: 10.1016/j.ijbiomac.2019.12.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 11/29/2019] [Accepted: 12/04/2019] [Indexed: 02/08/2023]
Abstract
α-Galactosidases are potent industrial glycoside hydrolases which are relatively less explored for their transglycosylation potential, especially from Lactobacillus genera. A GH36 α-galactosidase from Lactobacillus plantarum WCFS1 was cloned and over expressed in Hi-control Escherichia coli BL21(DE3). Ni-NTA affinity gel chromatography resulted in purified α-galactosidase (LpαG; specific activity 3077.35 U mg-1) having a monomeric weight of ~80 kDa with 29.3% yield. Size exclusion chromatography of LpαG showed native molecular mass of ~240.5 kDa. LpαG displayed optimum activity at pH 6 and 37 °C. The Km,Vmax and kcat/Km of LpαG towards pNPαGal were found to be 0.93 mM and 714.3 μmol ml-1 min-1 and 12,075 s-1 mM-1, respectively. LpαG displayed maximum transglycosylation activity towards melibiose substrate (as both donor and acceptor) and synthesized majorly a trisaccharide with 0.26 mg ml-1 yield. Nuclear magnetic resonance (NMR) characterization revealed that trisaccharide consist of only single species of α-linked galactooligosaccharide (manninotriose; α-d-Galp-(1 → 6)-α-d-Galp-(1 → 6)-d-Glcp) with α-(1 → 6) regioselectivity. Manninotriose displayed prebiotic property by supporting the growth of probiotic L. plantarum WCFS1 and Bifidobacteria adolescentis DSM 20083.
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Affiliation(s)
- Deepesh Panwar
- Department of Protein Chemistry and Technology, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC) Campus, Ghaziabad, UP 201 002, India
| | - A Shubhashini
- Department of Protein Chemistry and Technology, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India
| | - Sachin Rama Chaudhari
- Department of Spices and Flavour Sciences, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC) Campus, Ghaziabad, UP 201 002, India
| | - K V Harish Prashanth
- Department of Biochemistry, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC) Campus, Ghaziabad, UP 201 002, India
| | - Mukesh Kapoor
- Department of Protein Chemistry and Technology, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC) Campus, Ghaziabad, UP 201 002, India.
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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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Bayraktar H, Önal S. Cross-linked α-galactosidase aggregates: optimization, characterization and application in the hydrolysis of raffinose-type oligosaccharides in soymilk. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:4748-4760. [PMID: 30932192 DOI: 10.1002/jsfa.9720] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/14/2019] [Accepted: 03/29/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Cross-linked enzyme aggregates (CLEAs) of α-galactosidase, partially purified from maize (Zea mays) flour, were prepared. The impact of various parameters on enzyme activity was examined to optimize the immobilization procedure. Biochemical characterization of the free and immobilized enzyme was carried out. Stability (thermal, pH, storage and operational stability) and reusability tests were performed. The potential use of the free enzyme and the CLEAs in hydrolysis processes of raffinose-type oligosaccharides present in soymilk was investigated. RESULTS α-galactosidase CLEAs were prepared with 47% activity recovery under optimum conditions [1:5 (v/v) enzyme solution:saturated ammonium sulfate solution ratio; 7.5 mg protein and 0.1% (v/v) glutaraldehyde, 6 h, 4 °C, 150 rpm]. α-galactosidase CLEAs exhibited increased stability in comparison to the free enzyme. The CLEAs and the free enzyme showed a maximum activity at 40°C and their optimal pH values were5.5 and 6.0, respectively. Kinetic constants (KM , Vmax and kcat ) were calculated for the free enzyme and the CLEAs in the presence of p-nitrophenyl-α-d-galactopyranoside, stachyose, melibiose and raffinose. The effect of various chemicals and sugars on enzyme activity showed that both enzyme forms were significantly inhibited by HgCl2 and galactose. The CLEAs hydrolyzed 85% of raffinose and 96% of stachyose. CONCLUSION The α-galactosidase CLEAs, with their satisfactory enzymatic characteristics, have much potential for use in the food and feed industry. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Hasan Bayraktar
- Faculty of Science, Biochemistry Department, Ege University, Bornova-İzmir, Turkey
| | - Seçil Önal
- Faculty of Science, Biochemistry Department, Ege University, Bornova-İzmir, Turkey
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10
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Baffa Júnior JC, Viana PA, de Rezende ST, Soares NDFF, Guimarães VM. Immobilization of an alpha-galactosidase from Debaryomyces hansenni UFV-1 in cellulose film and its application in oligosaccharides hydrolysis. FOOD AND BIOPRODUCTS PROCESSING 2018. [DOI: 10.1016/j.fbp.2018.06.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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The GlaA signal peptide substantially increases the expression and secretion of α-galactosidase in Aspergillus niger. Biotechnol Lett 2018; 40:949-955. [DOI: 10.1007/s10529-018-2540-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 03/17/2018] [Indexed: 02/06/2023]
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12
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Solaiman DK, Ashby RD, Aneja KK, Crocker NV, Liu Y. Galacto-oligosaccharide hydrolysis by genetically-engineered alpha-galactosidase-producing Pseudomonas chlororaphis strains. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2017.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Al Loman A, Ju LK. Enzyme-based processing of soybean carbohydrate: Recent developments and future prospects. Enzyme Microb Technol 2017; 106:35-47. [PMID: 28859808 DOI: 10.1016/j.enzmictec.2017.06.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 06/15/2017] [Accepted: 06/26/2017] [Indexed: 12/11/2022]
Abstract
Soybean is well known for its high-value oil and protein. Carbohydrate is, however, an underutilized major component, representing almost 26-30% (w/w) of the dried bean. The complex soybean carbohydrate is not easily hydrolyzable and can cause indigestibility when included in food and feed. Enzymes can be used to hydrolyze the carbohydrate for improving soybean processing and value of soybean products. Here the enzyme-based processing developed for the following purposes is reviewed: hydrolysis of different carbohydrate-rich by/products from soybean processing, improvement of soybean oil extraction, and increase of nutritional value of soybean-based food and animal feed. Once hydrolyzed into fermentable sugars, soybean carbohydrate can find more value-added applications and further improve the overall economics of soybean processing.
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Affiliation(s)
- Abdullah Al Loman
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325-3906, USA
| | - Lu-Kwang Ju
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325-3906, USA.
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Improving the Secretory Expression of an -Galactosidase from Aspergillus niger in Pichia pastoris. PLoS One 2016; 11:e0161529. [PMID: 27548309 PMCID: PMC4993465 DOI: 10.1371/journal.pone.0161529] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 08/08/2016] [Indexed: 11/21/2022] Open
Abstract
α-Galactosidases are broadly used in feed, food, chemical, pulp, and pharmaceutical industries. However, there lacks a satisfactory microbial cell factory that is able to produce α-galactosidases efficiently and cost-effectively to date, which prevents these important enzymes from greater application. In this study, the secretory expression of an Aspergillus niger α-galactosidase (AGA) in Pichia pastoris was systematically investigated. Through codon optimization, signal peptide replacement, comparative selection of host strain, and saturation mutagenesis of the P1’ residue of Kex2 protease cleavage site for efficient signal peptide removal, a mutant P. pastoris KM71H (Muts) strain of AGA-I with the specific P1’ site substitution (Glu to Ile) demonstrated remarkable extracellular α-galactosidase activity of 1299 U/ml upon a 72 h methanol induction in 2.0 L fermenter. The engineered yeast strain AGA-I demonstrated approximately 12-fold higher extracellular activity compared to the initial P. pastoris strain. To the best of our knowledge, this represents the highest yield and productivity of a secreted α-galactosidase in P. pastoris, thus holding great potential for industrial application.
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Guo Y, Song Y, Qiu Y, Shao X, Wang H, Song Y. Purification of thermostable α-galactosidase from Irpex lacteus and its use for hydrolysis of oligosaccharides. J Basic Microbiol 2016; 56:448-58. [PMID: 26946959 DOI: 10.1002/jobm.201500668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 02/11/2016] [Indexed: 12/26/2022]
Abstract
A monomeric α-galactosidase (ILGI) from the mushroom Irpex lacteus was purified 94.19-fold to electrophoretic homogeneity. ILGI exhibited a specific activity of 18.36 U mg(-1) and demonstrated a molecular mass of 60 kDa in sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). ILGI was optimally active at 80 °C and pH 5.0, and it was stable over a temperature range of 4-70 °C and a wide pH range of 2.0-12.0. ILGI was completely inactivated by Ag(+) and Hg(2+) ions and N-bromosuccinimide (NBS). Moreover, ILGI exhibited good resistance to proteases. Galactose acted as a noncompetitive inhibitor with Ki and Kis of 3.34 and 0.29 mM, respectively. The α-galactosidase presented a broad substrate specificity, which included p-nitrophenyl α-D-galactopyranoside (pNPGal), melibiose, stachyose, and raffinose with Km values of 1.27, 3.24, 7.1, and 22.12 mM, correspondingly. ILGI exhibited efficient and complete hydrolysis to raffinose and stachyose. The aforementioned features of this enzyme suggest its potential value in food and feed industries.
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Affiliation(s)
- Yajie Guo
- College of Biological Sciences, China Agricultural University, Beijing, P.R. China
| | - Yi Song
- School of Public Health, Peking University, Beijing, P.R. China
| | - Yi Qiu
- College of Biological Sciences, China Agricultural University, Beijing, P.R. China
| | - Xiaoming Shao
- Beijing key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Sciences, China Agricultural University, Beijing, P.R. China
| | - Hexiang Wang
- College of Biological Sciences, China Agricultural University, Beijing, P.R. China
| | - Yuan Song
- College of Biological Sciences, China Agricultural University, Beijing, P.R. China
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Hu Y, Tian G, Geng X, Zhang W, Zhao L, Wang H, Ng TB. A protease-resistant α-galactosidase from Pleurotus citrinopileatus with broad substrate specificity and good hydrolytic activity on raffinose family oligosaccharides. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.01.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Hydrolysis of Oligosaccharides by a Thermostable α-Galactosidase from Termitomyces eurrhizus. Int J Mol Sci 2015; 16:29226-35. [PMID: 26670230 PMCID: PMC4691104 DOI: 10.3390/ijms161226159] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 11/27/2015] [Accepted: 12/01/2015] [Indexed: 11/16/2022] Open
Abstract
The genus of Termitomyces purchased from the market has been identified as Termitomyces eurrhizus using the Internal Transcribed Spacer (ITS) method. An α-galactosidase from T. eurrhizus (TEG), a monomeric protein with a molecular mass of 72 kDa, was purified 146 fold by employing ion exchange chromatography and gel filtration. The optimum pH and temperature was 5.0 and 60 °C, respectively. TEG was stable over pH 2–6, and also exhibited good thermostablility, retaining 100% of the original activity after incubation at 60 °C for 2 h. Inhibition of the enzyme activity by N-bromosuccinimide (NBS) constituted evidence for an essential role of tryptophan in the catalytic action of the isolated enzyme. Besides 4-nitro-phenyl α-d-galactophyranoside (pNPGal), natural substrates could also be effectively hydrolyzed by TEG. Results of thin-layer chromatography (TLC) revealed complete enzymatic hydrolysis of raffinose and stachyose to galactose at 50 °C within 6 h. These properties of TEG advocate its utilization for elevating the nutritional value of soymilk.
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Raggi P, Lopez P, Diaz A, Carrasco D, Silva A, Velez A, Opazo R, Magne F, Navarrete PA. Debaryomyces hanseniiandRhodotorula mucilaginosacomprised the yeast core gut microbiota of wild and reared carnivorous salmonids, croaker and yellowtail. Environ Microbiol 2014; 16:2791-803. [DOI: 10.1111/1462-2920.12397] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 01/06/2014] [Accepted: 01/07/2014] [Indexed: 12/15/2022]
Affiliation(s)
- Patricia Raggi
- Laboratorio de Biotecnología; INTA; Universidad de Chile; Santiago Chile
| | - Paulina Lopez
- Laboratorio de Biotecnología; INTA; Universidad de Chile; Santiago Chile
| | - Angélica Diaz
- Laboratorio de Biotecnología; INTA; Universidad de Chile; Santiago Chile
| | - Diana Carrasco
- Laboratorio de Biotecnología; INTA; Universidad de Chile; Santiago Chile
| | - Alfonso Silva
- Laboratorio de Cultivo de Peces; Universidad Católica del Norte; Coquimbo Chile
| | - Antonio Velez
- Centro de Desarrollo y Transferencia Tecnológica (CDTT); Fundación Chile; Tongoy Chile
| | - Rafael Opazo
- Laboratorio de Biotecnología; INTA; Universidad de Chile; Santiago Chile
| | - Fabien Magne
- CNRS UMR7212-Inserm U944-Université Paris Diderot; Conservatoire National des Arts et Métiers (CNAM); Paris France
- Institut de Recherche pour le Développement, delegation; Santiago Chile
| | - Paola A. Navarrete
- Laboratorio de Biotecnología; INTA; Universidad de Chile; Santiago Chile
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Purification an α-galactosidase from Coriolus versicolor with acid-resistant and good degradation ability on raffinose family oligosaccharides. World J Microbiol Biotechnol 2013; 30:1261-7. [DOI: 10.1007/s11274-013-1549-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 10/29/2013] [Indexed: 11/27/2022]
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20
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Katrolia P, Rajashekhara E, Yan Q, Jiang Z. Biotechnological potential of microbial α-galactosidases. Crit Rev Biotechnol 2013; 34:307-17. [DOI: 10.3109/07388551.2013.794124] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Park I, Lee J, Cho J. Partial Characterization of α-Galactosidic Activity from the Antarctic Bacterial Isolate, Paenibacillus sp. LX-20 as a Potential Feed Enzyme Source. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2012; 25:852-60. [PMID: 25049637 PMCID: PMC4093098 DOI: 10.5713/ajas.2011.11501] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 03/05/2012] [Accepted: 02/17/2012] [Indexed: 11/27/2022]
Abstract
An Antarctic bacterial isolate displaying extracellular α-galactosidic activity was named Paenibacillus sp. LX-20 based on 16S rRNA gene sequence analysis. Optimal activity for the LX-20 α-galactosidase occurred at pH 6.0–6.5 and 45°C. The enzyme immobilized on the smart polymer Eudragit L-100 retained 70% of its original activity after incubation for 30 min at 50°C, while the free enzyme retained 58% of activity. The enzyme had relatively high specificity for α-D-galactosides such as p-nitrophenyl-α-galactopyranoside, melibiose, raffinose and stachyose, and was resistant to some proteases such as trypsin, pancreatin and pronase. Enzyme activity was almost completely inhibited by Ag+, Hg2+, Cu2+, and sodium dodecyl sulfate, but activity was not affected by β-mercaptoethanol or EDTA. LX-20 α-galactosidase may be potentially useful as an additive for soybean processing in the feed industry.
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22
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Liu CQ, He GQ. Multiple α-galactosidases from Aspergillus foetidus ZU-G1: purification, characterization and application in soybean milk hydrolysis. Eur Food Res Technol 2012. [DOI: 10.1007/s00217-012-1679-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Ferreira JG, Reis AP, Guimarães VM, Falkoski DL, Fialho LDS, de Rezende ST. Purification and characterization of Aspergillus terreus α-galactosidases and their use for hydrolysis of soymilk oligosaccharides. Appl Biochem Biotechnol 2011; 164:1111-25. [PMID: 21331589 DOI: 10.1007/s12010-011-9198-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2010] [Accepted: 02/03/2011] [Indexed: 10/18/2022]
Abstract
α-Galactosidases has the potential to hydrolyze α-1-6 linkages in raffinose family oligosaccharides (RFO). Aspergillus terreus cells cultivated on wheat bran produced three extracellular forms of α-galactosidases (E1, E2, and E3). E1 and E2 α-galactosidases presented maximal activities at pH 5, while E3 α-galactosidase was more active at pH 5.5. The E1 and E2 enzymes showed stability for 6 h at pH 4-7. Maximal activities were determined at 60, 55, and 50 °C, for E1, E2, and E3 α-galactosidase, respectively. E2 α-galactosidase retained 90% of its initial activity after 70 h at 50 °C. The enzymes hydrolyzed ρNPGal, melibiose, raffinose and stachyose, and E1 and E2 enzymes were able to hydrolyze guar gum and locust bean gum substrates. E1 and E3 α-galactosidases were completely inhibited by Hg²⁺, Ag⁺, and Cu²⁺. The treatment of RFO present in soy milk with the enzymes showed that E1 α-galactosidase reduced the stachyose content to zero after 12 h of reaction, while E2 promoted total hydrolysis of raffinose. The complete removal of the oligosaccharides in soy milk could be reached by synergistic action of both enzymes.
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Affiliation(s)
- Joana Gasperazzo Ferreira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, 36.570-000 Viçosa, Minas Gerais, Brazil
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Viana PA, de Rezende ST, Passos FML, Machado SG, Maitan GP, da Silva Coelho VT, Guimarães VM. α-Galactosidases production by Debaryomyces hansenii UFV-1. Food Sci Biotechnol 2011. [DOI: 10.1007/s10068-011-0085-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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25
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Corchero JL, Mendoza R, Lorenzo J, Rodríguez-Sureda V, Domínguez C, Vázquez E, Ferrer-Miralles N, Villaverde A. Integrated approach to produce a recombinant, his-tagged human α-galactosidase a in mammalian cells. Biotechnol Prog 2011; 27:1206-17. [DOI: 10.1002/btpr.637] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 02/16/2011] [Indexed: 11/06/2022]
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Activity of Debaryomyces hansenii UFV-1 α-galactosidases against α-d-galactopyranoside derivatives. Carbohydr Res 2011; 346:602-5. [DOI: 10.1016/j.carres.2011.01.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Revised: 01/10/2011] [Accepted: 01/20/2011] [Indexed: 11/23/2022]
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27
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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, Rezende ST, Meza AN, Gomide FT, Nagem RA, Santos AM, Santoro MM, Guimarães VM. Spectroscopic and thermodynamic properties of Debaryomyces hansenii UFV-1 α-galactosidases. Int J Biol Macromol 2010; 46:298-303. [DOI: 10.1016/j.ijbiomac.2010.01.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Revised: 01/06/2010] [Accepted: 01/07/2010] [Indexed: 11/25/2022]
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Rodrigues Brasil AP, de Rezende ST, do Carmo Gouveia Pelúzio M, Guimarães VM. Removal of oligosaccharides in soybean flour and nutritional effects in rats. Food Chem 2010. [DOI: 10.1016/j.foodchem.2009.04.124] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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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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31
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Falkoski DL, Guimarães VM, de Queiroz MV, de Araújo EF, de Almeida MN, de Barros EG, de Rezende ST. Covalent Immobilization of α-Galactosidase from Penicillium griseoroseum and its Application in Oligosaccharides Hydrolysis. Appl Biochem Biotechnol 2008; 158:540-51. [DOI: 10.1007/s12010-008-8387-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2008] [Accepted: 09/29/2008] [Indexed: 11/30/2022]
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32
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Fialho LDS, Guimarães VM, Callegari CM, Reis AP, Barbosa DS, Borges EEDL, Moreira MA, de Rezende ST. Characterization and biotechnological application of an acid alpha-galactosidase from Tachigali multijuga Benth. seeds. PHYTOCHEMISTRY 2008; 69:2579-2585. [PMID: 18834998 DOI: 10.1016/j.phytochem.2008.08.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2007] [Revised: 08/05/2008] [Accepted: 08/10/2008] [Indexed: 05/26/2023]
Abstract
Tachigali multijuga Benth. seeds were found to contain protein (364 mg g(-1)dwt), lipids (24 mg g(-1)dwt), ash (35 mg g(-1)dwt), and carbohydrates (577 mg g(-1)dwt). Sucrose, raffinose, and stachyose concentrations were 8.3, 3.0, and 11.6 mg g(-1)dwt, respectively. alpha-Galactosidase activity increased during seed germination and reached a maximum level at 108 h after seed imbibition. The alpha-galactosidase purified from germinating seeds had an M(r) of 38,000 and maximal activity at pH 5.0-5.5 and 50 degrees C. The enzyme was stable at 35 degrees C and 40 degrees C, but lost 79% of its activity after 30 min at 50 degrees C. The activation energy (E(a)) values for p-nitrophenyl-alpha-d-galactopyranoside (pNPGal) and raffinose were 13.86 and 4.75 kcal mol(-1), respectively. The K(m) values for pNPGal, melibiose, raffinose, and stachyose were 0.45, 5.37, 39.62 and 48.80 mM, respectively. The enzyme was sensitive to inhibition by HgCl(2), SDS, AgNO(3), CuSO(4), and melibiose. d-Galactose was a competitive inhibitor (K(i)=2.74 mM). In addition to its ability to hydrolyze raffinose and stachyose, the enzyme also hydrolyzed galactomannan.
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Affiliation(s)
- Lílian da Silva Fialho
- Departamento de Bioquímica e Biologia Molecular - BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brazil
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Purification and Characterization of Thermostable α-Galactosidase from Aspergillus terreus GR. Appl Biochem Biotechnol 2008; 152:275-85. [DOI: 10.1007/s12010-008-8271-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2007] [Accepted: 05/01/2008] [Indexed: 10/22/2022]
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34
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Nacheva L, Aleksieva P, Bratovanova E, Stoineva I, Yakimova B, Tchorbanov B. Soy Meal Waste Extract as Cultivation Medium for Production of Extracellular α-Galactosidase from the Fungus Humicola Lutea120–5. BIOTECHNOL BIOTEC EQ 2008. [DOI: 10.1080/13102818.2008.10817544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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35
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36
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Falkoski DL, Guimarães VM, Callegari CM, Reis AP, de Barros EG, de Rezende ST. Processing of soybean products by semipurified plant and microbial alpha-galactosidases. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2006; 54:10184-90. [PMID: 17177558 DOI: 10.1021/jf0617162] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Galactooligosaccharides (GO) are responsible for intestinal disturbances following ingestion of legume-derived products. Enzymatic reduction of GO level in these products is highly desirable to improve their acceptance. For this purpose, plant and microbial semipurified alpha-galactosidases were used for GO hydrolysis in soybean flour and soy molasses. alpha-Galactosidases from soybean germinating seeds, Aspergillus terreus, and Penicillium griseoroseum presented maximal activities at pH 4.0-5.0 and 45-65 degrees C. The KM,app values determined for raffinose by the soybean, A. terreus, and P. griseoroseum alpha-galactosidases were 3.44, 19.39, and 20.67 mM, respectively. The enzymes were completely inhibited by Ag+ and Hg2+, whereas only soybean enzyme was inhibited by galactose. A. terreus alpha-galactosidase was more thermostable than the enzymes from the other two sources. This enzyme maintained about 100% of its original activity after 3 h at 60 C. The microbial alpha-galactosidases were more efficient for reducing GO in soybean flour and soy molasses than soybean enzyme.
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Affiliation(s)
- Daniel L Falkoski
- BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG 36.570-000, Brazil
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37
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Current awareness on yeast. Yeast 2006. [DOI: 10.1002/yea.1319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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