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Córdova A, Astudillo-Castro C, Henriquez P, Manriquez N, Nuñez H, Guerrero C, Álvarez D, Aburto C, Carrasco V, Oñate S, Lehuedé L. Ultrasound-assisted enzymatic synthesis of galacto-oligosaccharides using native whey with two commercial β-galactosidases: Aspergillus oryzae and Kluyveromyces var lactis. Food Chem 2023; 426:136526. [PMID: 37307741 DOI: 10.1016/j.foodchem.2023.136526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 05/02/2023] [Accepted: 05/31/2023] [Indexed: 06/14/2023]
Abstract
Native whey obtained during casein micelle microfiltration was used as a novel source to produce galacto-oligosaccharides (GOS). Since the presence of macromolecules and other interferers reduces biocatalyst performance, this work evaluated the effect of different ultrasound processing conditions on GOS synthesis using concentrated native whey. Ultrasonic intensities (UI) below 11 W/cm2 tended to increase the activity in the enzyme from Aspergillus oryzae for several minutes but accelerated the inactivation in that from Kluyveromyces lactis. At 40 °C, 40 % w/w native whey, 70 % wave amplitude, and 0.6 s/s duty-cycle, a UI of 30 W/cm2 was achieved, and the increased specific enzyme productivity was similar to the values obtained with pure lactose (∼0.136 g GOS/h/mgE). This strategy allows for obtaining a product containing prebiotics with the healthy and functional properties of whey proteins, avoiding the required purification steps used in the production of food-grade lactose.
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Affiliation(s)
- Andrés Córdova
- Escuela de Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716 Playa Ancha, Valparaíso 2360100, Chile.
| | - Carolina Astudillo-Castro
- Escuela de Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716 Playa Ancha, Valparaíso 2360100, Chile
| | - Paola Henriquez
- Escuela de Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716 Playa Ancha, Valparaíso 2360100, Chile
| | - Natalia Manriquez
- Departamento de Ingeniería Química y Ambiental, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso 2360100, Chile
| | - Helena Nuñez
- Escuela de Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716 Playa Ancha, Valparaíso 2360100, Chile; Departamento de Ingeniería Química y Ambiental, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso 2360100, Chile
| | - Cecilia Guerrero
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2085, Valparaíso 2360100, Chile
| | - Dafne Álvarez
- Escuela de Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716 Playa Ancha, Valparaíso 2360100, Chile
| | - Carla Aburto
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2085, Valparaíso 2360100, Chile
| | - Vinka Carrasco
- Escuela de Alimentos, Pontificia Universidad Católica de Valparaíso, Waddington 716 Playa Ancha, Valparaíso 2360100, Chile
| | - Sebastian Oñate
- Departamento de Ingeniería Química y Ambiental, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso 2360100, Chile
| | - Luciana Lehuedé
- Centre for Biotechnology and Bioengineering, Department of Chemical Engineering, Biotechnology and Materials, University of Chile, Beauchef 851, Santiago 8370448, Chile
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2
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Moroz OV, Blagova E, Lebedev AA, Sánchez Rodríguez F, Rigden DJ, Tams JW, Wilting R, Vester JK, Longhin E, Hansen GH, Krogh KBRM, Pache RA, Davies GJ, Wilson KS. Multitasking in the gut: the X-ray structure of the multidomain BbgIII from Bifidobacterium bifidum offers possible explanations for its alternative functions. Acta Crystallogr D Struct Biol 2021; 77:1564-1578. [PMID: 34866612 DOI: 10.1107/s2059798321010949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 10/20/2021] [Indexed: 11/10/2022] Open
Abstract
β-Galactosidases catalyse the hydrolysis of lactose into galactose and glucose; as an alternative reaction, some β-galactosidases also catalyse the formation of galactooligosaccharides by transglycosylation. Both reactions have industrial importance: lactose hydrolysis is used to produce lactose-free milk, while galactooligosaccharides have been shown to act as prebiotics. For some multi-domain β-galactosidases, the hydrolysis/transglycosylation ratio can be modified by the truncation of carbohydrate-binding modules. Here, an analysis of BbgIII, a multidomain β-galactosidase from Bifidobacterium bifidum, is presented. The X-ray structure has been determined of an intact protein corresponding to a gene construct of eight domains. The use of evolutionary covariance-based predictions made sequence docking in low-resolution areas of the model spectacularly easy, confirming the relevance of this rapidly developing deep-learning-based technique for model building. The structure revealed two alternative orientations of the CBM32 carbohydrate-binding module relative to the GH2 catalytic domain in the six crystallographically independent chains. In one orientation the CBM32 domain covers the entrance to the active site of the enzyme, while in the other orientation the active site is open, suggesting a possible mechanism for switching between the two activities of the enzyme, namely lactose hydrolysis and transgalactosylation. The location of the carbohydrate-binding site of the CBM32 domain on the opposite site of the module to where it comes into contact with the catalytic GH2 domain is consistent with its involvement in adherence to host cells. The role of the CBM32 domain in switching between hydrolysis and transglycosylation modes offers protein-engineering opportunities for selective β-galactosidase modification for industrial purposes in the future.
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Affiliation(s)
- Olga V Moroz
- York Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Elena Blagova
- York Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Andrey A Lebedev
- CCP4, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, United Kingdom
| | - Filomeno Sánchez Rodríguez
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom
| | - Daniel J Rigden
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool L69 7ZB, United Kingdom
| | | | | | | | - Elena Longhin
- Novozymes A/S, Biologiens Vej 2, 2800 Kgs. Lyngby, Denmark
| | | | | | - Roland A Pache
- Novozymes A/S, Biologiens Vej 2, 2800 Kgs. Lyngby, Denmark
| | - Gideon J Davies
- York Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Keith S Wilson
- York Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5DD, United Kingdom
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3
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Ambrogi V, Bottacini F, Cao L, Kuipers B, Schoterman M, van Sinderen D. Galacto-oligosaccharides as infant prebiotics: production, application, bioactive activities and future perspectives. Crit Rev Food Sci Nutr 2021; 63:753-766. [PMID: 34477457 DOI: 10.1080/10408398.2021.1953437] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Galacto-oligosaccharides (GOS) are non-digestible oligosaccharides characterized by a mix of structures that vary in their degree of polymerization (DP) and glycosidic linkage between the galactose moieties or between galactose and glucose. They have enjoyed extensive scientific scrutiny, and their health-promoting effects are supported by a large number of scientific and clinical studies. A variety of GOS-associated health-promoting effects have been reported, such as growth promotion of beneficial bacteria, in particular bifidobacteria and lactobacilli, inhibition of pathogen adhesion and improvement of gut barrier function. GOS have attracted significant interest from food industries for their versatility as a bioactive ingredient and in particular as a functional component of infant formulations. These oligosaccharides are produced in a kinetically-controlled reaction involving lactose transgalactosylation, being catalyzed by particular β-galactosidases of bacterial or fungal origin. Despite the well-established technology applied for GOS production, this process may still meet with technological challenges when employed at an industrial scale. The current review will cover relevant scientific literature on the beneficial physiological properties of GOS as a prebiotic for the infant gut microbiota, details of GOS structures, the associated reaction mechanism of β-galactosidase, and its (large-scale) production.
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Affiliation(s)
- Valentina Ambrogi
- School of Microbiology, University College Cork, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Francesca Bottacini
- APC Microbiome Ireland, University College Cork, Cork, Ireland.,Department of Biological Sciences, Munster Technological University, Cork, Ireland
| | - Linqiu Cao
- FrieslandCampina, Amersfoort, The Netherlands
| | - Bas Kuipers
- FrieslandCampina, Amersfoort, The Netherlands
| | | | - Douwe van Sinderen
- School of Microbiology, University College Cork, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
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4
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Abstract
N-Acetyllactosamine (LacNAc) or more specifically β-d-galactopyranosyl-1,4-N-acetyl-d-glucosamine is a unique acyl-amino sugar and a key structural unit in human milk oligosaccharides, an antigen component of many glycoproteins, and an antiviral active component for the development of effective drugs against viruses. LacNAc is useful itself and as a basic building block for producing various bioactive oligosaccharides, notably because this synthesis may be used to add value to dairy lactose. Despite a significant amount of information in the literature on the benefits, structures, and types of different LacNAc-derived oligosaccharides, knowledge about their effective synthesis for large-scale production is still in its infancy. This work provides a comprehensive analysis of existing production strategies for LacNAc and important LacNAc-based structures, including sialylated LacNAc as well as poly- and oligo-LacNAc. We conclude that direct extraction from milk is too complex, while chemical synthesis is also impractical at an industrial scale. Microbial routes have application when multiple step reactions are needed, but the major route to large-scale biochemical production will likely lie with enzymatic routes, particularly those using β-galactosidases (for LacNAc synthesis), sialidases (for sialylated LacNAc synthesis), and β-N-acetylhexosaminidases (for oligo-LacNAc synthesis). Glycosyltransferases, especially for the biosynthesis of extended complex LacNAc structures, could also play a major role in the future. In these cases, immobilization of the enzyme can increase stability and reduce cost. Processing parameters, such as substrate concentration and purity, acceptor/donor ratio, water activity, and temperature, can affect product selectivity and yield. More work is needed to optimize these reaction parameters and in the development of robust, thermally stable enzymes to facilitate commercial production of these important bioactive substances.
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Affiliation(s)
- M Karimi Alavijeh
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - A S Meyer
- Protein Chemistry and Enzyme Technology Division, Department of Biotechnology and Biomedicine, Technical University of Denmark (DTU), DK-2800 Kongens Lyngby, Denmark
| | - S L Gras
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - S E Kentish
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
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5
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He X, Luan M, Han N, Wang T, Zhao X, Yao Y. Construction and Analysis of Food-Grade Lactobacillus kefiranofaciens β-Galactosidase Overexpression System. J Microbiol Biotechnol 2021; 31:550-558. [PMID: 33622994 PMCID: PMC9705900 DOI: 10.4014/jmb.2101.01028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/17/2021] [Accepted: 02/22/2021] [Indexed: 12/15/2022]
Abstract
Lactobacillus kefiranofaciens contains two types of β-galactosidase, LacLM and LacZ, belonging to different glycoside hydrolase families. The difference in function between them has been unclear so far for practical application. In this study, LacLM and LacZ from L. kefiranofaciens ATCC51647 were cloned into constitutive lactobacillal expression vector pMG36e, respectively. Furtherly, pMG36n-lacs was constructed from pMG36e-lacs by replacing erythromycin with nisin as selective marker for food-grade expressing systems in Lactobacillus plantarum WCFS1, designated recombinant LacLM and LacZ respectively. The results from hydrolysis of o-nitrophenyl-β-galactopyranoside (ONPG) showed that the β-galactosidases activity of the recombinant LacLM and LacZ was 1460% and 670% higher than that of the original L. kefiranofaciens. Moreover, the lactose hydrolytic activity of recombinant LacLM was higher than that of LacZ in milk. Nevertheless, compare to LacZ, in 25% lactose solution the galacto-oligosaccharides (GOS) production of recombinant LacLM was lower. Therefore, two β-galactopyranosides could play different roles in carbohydrate metabolism of L. kefiranofaciens. In addition, the maximal growth rate of two recombinant strains were evaluated with different temperature level and nisin concentration in fermentation assay for practical purpose. The results displayed that 37°C and 20-40 U/ml nisin were the optimal fermentation conditions for the growth of recombinant β-galactosidase strains. Altogether the food-grade Expression system of recombinant β-galactosidase was feasible for applications in the food and dairy industry.
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Affiliation(s)
- Xi He
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong Province, P.R. China,College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China
| | - MingJian Luan
- College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China
| | - Ning Han
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong Province, P.R. China,College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China,Corresponding author Phone/ Fax: +86-0531-89631776 E-mail:
| | - Ting Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong Province, P.R. China,College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China
| | - Xiangzhong Zhao
- College of Biologic Engineering, Qi Lu University of Technology, Jinan, Shandong Province, P.R. China
| | - Yanyan Yao
- National Engineering Research Center for Marine Shellfish, Weihai, Shandong Province, P.R. China
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6
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Kriechbaum R, Ziaee E, Grünwald‐Gruber C, Buscaill P, van der Hoorn RAL, Castilho A. BGAL1 depletion boosts the level of β-galactosylation of N- and O-glycans in N. benthamiana. Plant Biotechnol J 2020; 18:1537-1549. [PMID: 31837192 PMCID: PMC7292537 DOI: 10.1111/pbi.13316] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 11/28/2019] [Accepted: 12/05/2019] [Indexed: 05/18/2023]
Abstract
Glyco-design of proteins is a powerful tool in fundamental studies of structure-function relationship and in obtaining profiles optimized for efficacy of therapeutic glycoproteins. Plants, particularly Nicotiana benthamiana, are attractive hosts to produce recombinant glycoproteins, and recent advances in glyco-engineering facilitate customized N-glycosylation of plant-derived glycoproteins. However, with exception of monoclonal antibodies, homogenous human-like β1,4-galactosylation is very hard to achieve in recombinant glycoproteins. Despite significant efforts to optimize the expression of β1,4-galactosyltransferase, many plant-derived glycoproteins still exhibit incomplete processed N-glycans with heterogeneous terminal galactosylation. The most obvious suspects to be involved in trimming terminal galactose residues are β-galactosidases (BGALs) from the glycosyl hydrolase family GH35. To elucidate the so far uncharacterized mechanisms leading to the trimming of terminal galactose residues from glycans of secreted proteins, we studied a N. benthamiana BGAL known to be active in the apoplast (NbBGAL1). Here, we determined the NbBGAL1 subcellular localization, substrate specificity and in planta biological activity. We show that NbBGAL1 can remove β1,4- and β1,3-galactose residues on both N- and O-glycans. Transient BGAL1 down-regulation by RNA interference (RNAi) and BGAL1 depletion by genome editing drastically reduce β-galactosidase activity in N. benthamiana and increase the amounts of fully galactosylated complex N-glycans on several plant-produced glycoproteins. Altogether, our data demonstrate that NbBGAL1 acts on galactosylated complex N-glycans of plant-produced glycoproteins.
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Affiliation(s)
- Ricarda Kriechbaum
- Department of Applied Genetics and Cell BiologyUniversity of Natural Resources and Life SciencesViennaAustria
| | - Esmaiel Ziaee
- Department of Applied Genetics and Cell BiologyUniversity of Natural Resources and Life SciencesViennaAustria
- Department of Food Science and TechnologyCollege of AgricultureShiraz UniversityShirazIran
| | | | - Pierre Buscaill
- The Plant Chemetics LaboratoryDepartment of Plant SciencesUniversity of OxfordOxfordUK
| | | | - Alexandra Castilho
- Department of Applied Genetics and Cell BiologyUniversity of Natural Resources and Life SciencesViennaAustria
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7
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Arnold JW, Simpson JB, Roach J, Bruno-Barcena JM, Azcarate-Peril MA. Prebiotics for Lactose Intolerance: Variability in Galacto-Oligosaccharide Utilization by Intestinal Lactobacillus rhamnosus. Nutrients 2018; 10:E1517. [PMID: 30332787 PMCID: PMC6213946 DOI: 10.3390/nu10101517] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 10/09/2018] [Accepted: 10/11/2018] [Indexed: 12/12/2022] Open
Abstract
Lactose intolerance, characterized by a decrease in host lactase expression, affects approximately 75% of the world population. Galacto-oligosaccharides (GOS) are prebiotics that have been shown to alleviate symptoms of lactose intolerance and to modulate the intestinal microbiota, promoting the growth of beneficial microorganisms. We hypothesized that mechanisms of GOS utilization by intestinal bacteria are variable, impacting efficacy and response, with differences occurring at the strain level. This study aimed to determine the mechanisms by which human-derived Lactobacillus rhamnosus strains metabolize GOS. Genomic comparisons between strains revealed differences in carbohydrate utilization components, including transporters, enzymes for degradation, and transcriptional regulation, despite a high overall sequence identity (>95%) between strains. Physiological and transcriptomics analyses showed distinct differences in carbohydrate metabolism profiles and GOS utilization between strains. A putative operon responsible for GOS utilization was identified and characterized by genetic disruption of the 6-phospho-β-galactosidase, which had a critical role in GOS utilization. Our findings highlight the importance of strain-specific bacterial metabolism in the selection of probiotics and synbiotics to alleviate symptoms of gastrointestinal disorders including lactose intolerance.
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Affiliation(s)
- Jason W Arnold
- Center for Gastrointestinal Biology and Disease, Division of Gastroenterology and Hepatology, and UNC Microbiome Core, Department of Medicine, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Joshua B Simpson
- Center for Gastrointestinal Biology and Disease, Division of Gastroenterology and Hepatology, and UNC Microbiome Core, Department of Medicine, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Jeffery Roach
- Research Computing, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Jose M Bruno-Barcena
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27607, USA.
| | - M Andrea Azcarate-Peril
- Center for Gastrointestinal Biology and Disease, Division of Gastroenterology and Hepatology, and UNC Microbiome Core, Department of Medicine, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA.
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8
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Liu H, Qian M, Song C, Li J, Zhao C, Li G, Wang A, Han M. Down-Regulation of PpBGAL10 and PpBGAL16 Delays Fruit Softening in Peach by Reducing Polygalacturonase and Pectin Methylesterase Activity. Front Plant Sci 2018; 9:1015. [PMID: 30050556 PMCID: PMC6050397 DOI: 10.3389/fpls.2018.01015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 06/21/2018] [Indexed: 06/07/2023]
Abstract
β-galactosidases are cell wall hydrolases that play an important role in fruit softening. However, PpBGALs mechanism impacting on ethylene-dependent peach fruit softening was still unclear. In this study, we found that PpBGAL4, -6, -8, -10, -16, and -17 may be required for ethylene-dependent peach softening and PpBGAL10, -16 may make a main contribution to it among 17 PpBGALs. Utilization of virus-induced gene silencing (VIGS) showed that fruits were firmer than those of the control at 4 and 6 days after harvest (DAH) when PpBGAL10 and PpBGAL16 expression was down-regulated. Suppression of PpBGAL10 and PpBGAL16 expression also reduced PpPG21 and PpPME3 transcription, and polygalacturonase (PG) and pectinmethylesterases (PME) activity. Overall, total cell wall material and protopectin slowly declined, water-soluble pectin slowly increased, and cellulose and hemicellulose was altered significantly at 4 DAH, relative to control fruit. In addition, PpACO1 expression and ethylene production were also suppressed at 4 DAH because of inhibiting PpBGAL10 and PpBGAL16 expression. These results suggested that down-regulation of PpBGAL10 and PpBGAL16 expression delays peach fruit softening by decreasing PG and PME activity, which inhibits cell wall degradation and ethylene production.
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Affiliation(s)
- Hangkong Liu
- College of Horticulture, Northwest A&F University, Yangling, China
| | - Ming Qian
- Centre of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
| | - Chunhui Song
- College of Horticulture, Northwest A&F University, Yangling, China
| | - Jinjin Li
- College of Horticulture, Northwest A&F University, Yangling, China
| | - Caiping Zhao
- College of Horticulture, Northwest A&F University, Yangling, China
| | - Guofang Li
- College of Horticulture, Northwest A&F University, Yangling, China
| | - Anzhu Wang
- College of Horticulture, Northwest A&F University, Yangling, China
| | - Mingyu Han
- College of Horticulture, Northwest A&F University, Yangling, China
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9
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Moneo-Sánchez M, Izquierdo L, Martín I, Labrador E, Dopico B. Subcellular location of Arabidopsis thaliana subfamily a1 β-galactosidases and developmental regulation of transcript levels of their coding genes. Plant Physiol Biochem 2016; 109:137-145. [PMID: 27676245 DOI: 10.1016/j.plaphy.2016.09.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 09/15/2016] [Accepted: 09/20/2016] [Indexed: 06/06/2023]
Abstract
The aim of this work is to gain insight into the six members of the a1 subfamily of the β-galactosidases (BGAL) from Arabidopsis thaliana. First, the subcellular location of all these six BGAL proteins from a1 subfamily has been established in the cell wall by the construction of transgenic plants producing the enhanced green fluorescent protein (eGFP) fused to the BGAL proteins. BGAL12 is also located in the endoplasmic reticulum. Our study of the AtBGAL transcript accumulation along plant development indicated that all AtBGAL transcript appeared in initial stages of development, both dark- and light-grown seedlings, being AtBGAL1, AtBGAL2 and AtBGAL3 transcripts the predominant ones in the latter condition, mainly in the aerial part and with levels decreasing with age. The high accumulation of transcript of AtBGAL4 in basal internodes and in leaves at the end of development, and their strong increase after treatment both with BL and H3BO3 point to an involvement of BGAL4 in cell wall changes leading to the cease of elongation and increased rigidity. The changes of AtBGAL transcript accumulation in relation to different stages and conditions of plant development, suggest that each of the different gene products have a plant-specific function and provides support for the proposed function of the subfamily a1 BGAL in plant cell wall remodelling for cell expansion or for cell response to stress conditions.
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Affiliation(s)
- María Moneo-Sánchez
- Departamento de Botánica y Fisiología Vegetal, Instituto Hispano Luso de Investigaciones Agrarias, Universidad de Salamanca, C/ Licenciado Méndez Nieto s/n, 37007, Salamanca, Spain
| | - Lucía Izquierdo
- Departamento de Botánica y Fisiología Vegetal, Instituto Hispano Luso de Investigaciones Agrarias, Universidad de Salamanca, C/ Licenciado Méndez Nieto s/n, 37007, Salamanca, Spain
| | - Ignacio Martín
- Departamento de Botánica y Fisiología Vegetal, Instituto Hispano Luso de Investigaciones Agrarias, Universidad de Salamanca, C/ Licenciado Méndez Nieto s/n, 37007, Salamanca, Spain
| | - Emilia Labrador
- Departamento de Botánica y Fisiología Vegetal, Instituto Hispano Luso de Investigaciones Agrarias, Universidad de Salamanca, C/ Licenciado Méndez Nieto s/n, 37007, Salamanca, Spain
| | - Berta Dopico
- Departamento de Botánica y Fisiología Vegetal, Instituto Hispano Luso de Investigaciones Agrarias, Universidad de Salamanca, C/ Licenciado Méndez Nieto s/n, 37007, Salamanca, Spain.
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10
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Arreola S, Intanon M, Wongputtisin P, Kosma P, Haltrich D, Nguyen TH. Transferase Activity of Lactobacillal and Bifidobacterial β-Galactosidases with Various Sugars as Galactosyl Acceptors. J Agric Food Chem 2016; 64:2604-2611. [PMID: 26975338 PMCID: PMC4819807 DOI: 10.1021/acs.jafc.5b06009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 03/11/2016] [Accepted: 03/15/2016] [Indexed: 06/05/2023]
Abstract
The β-galactosidases from Lactobacillus reuteri L103 (Lreuβgal), Lactobacillus delbrueckii subsp. bulgaricus DSM 20081 (Lbulβgal), and Bifidobacterium breve DSM 20281 (Bbreβgal-I and Bbreβgal-II) were investigated in detail with respect to their propensity to transfer galactosyl moieties onto lactose, its hydrolysis products D-glucose and D-galactose, and certain sugar acceptors such as N-acetyl-D-glucosamine (GlcNAc), N-acetyl-D-galactosamine (GalNAc), and L-fucose (Fuc) under defined, initial velocity conditions. The rate constants or partitioning ratios (kNu/kwater) determined for these different acceptors (termed nucleophiles, Nu) were used as a measure for the ability of a certain substance to act as a galactosyl acceptor of these β-galactosidases. When using Lbulβgal or Bbreβgal-II, the galactosyl transfer to GlcNAc was 6 and 10 times higher than that to lactose, respectively. With lactose and GlcNAc used in equimolar substrate concentrations, Lbulβgal and Bbreβgal-II catalyzed the formation of N-acetyl-allolactosamine with the highest yields of 41 and 24%, respectively, as calculated from the initial GlcNAc concentration.
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Affiliation(s)
- Sheryl
Lozel Arreola
- Food
Biotechnology Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse
18, A-1190 Vienna, Austria
- Institute
of Chemistry, University of the Philippines
Los Baños, College, Laguna, Philippines
| | - Montira Intanon
- Food
Biotechnology Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse
18, A-1190 Vienna, Austria
- Department
of Veterinary Bioscience and Veterinary Public Health, Faculty of
Veterinary Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Pairote Wongputtisin
- Food
Biotechnology Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse
18, A-1190 Vienna, Austria
- Faculty
of Science, Maejo University, Chiang Mai, Thailand
| | - Paul Kosma
- Division
of Organic Chemistry, Department of Chemistry, BOKU − University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Dietmar Haltrich
- Food
Biotechnology Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse
18, A-1190 Vienna, Austria
| | - Thu-Ha Nguyen
- Food
Biotechnology Laboratory, Department of Food Science and Technology, BOKU − University of Natural Resources and
Life Sciences, Muthgasse
18, A-1190 Vienna, Austria
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Selvarajan E, Mohanasrinivasan V. Kinetic studies on exploring lactose hydrolysis potential of β galactosidase extracted from Lactobacillus plantarum HF571129. J Food Sci Technol 2015; 52:6206-17. [PMID: 26396367 DOI: 10.1007/s13197-015-1729-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 12/29/2014] [Accepted: 01/07/2015] [Indexed: 10/24/2022]
Abstract
A novel intracellular β-galactosidases produced by Lactobacillus plantarum HF571129, isolated from an Indian traditional fermented milk product curd was purified and characterized. The β-galactosidases is a hetrodimer with a molecular weight of 60 kDa (larger subunit) and 42 kDa (smaller subunit), as estimated by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE). The enzyme was purified 7.23 fold by ultrasonication, ultrafiltration and gel filtration chromatography with an overall recovery of 30.41 %. The optimum temperature for hydrolysis of its preferred substrates, o-nitrophenyl- β-D-galactopyranoside (ONPG) and lactose, are 50 °C (both), and optimum pH for these reactions is 6.5 and 7.5, respectively. The β-galactosidases showed higher affinity for ONPG (Km, 6.644 mM) as compared to lactose (Km, 23.28 mM). Galactose, the end product of lactose hydrolysis was found to be inhibited (47 %). The enzyme activity was drastically altered by the metal ion chelators EDTA, representing that this enzyme is a metalloenzyme. The enzyme was activated to a larger extent by Mg(2+) (73 % at 1 mM), while inhibited at higher concentrations of Na(+) (54 % at 100 mM), K(+) (16 % at 100 mM) and urea (16 % at 100 mM). The thermal stability study indicated an inactivation energy of Ed = 171.37 kJ mol(-1). Thermodynamic parameters such as ∆H, ∆S and ∆G, were determined as a function of temperature. About 88 % of lactose was hydrolyzed at room temperature within 1 h. The study suggested that this enzyme showed its obvious superiority in the industrial lactose conversion process.
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Affiliation(s)
- E Selvarajan
- School of Bio Sciences & Technology, VIT University, Vellore, Tamil Nadu India
| | - V Mohanasrinivasan
- School of Bio Sciences & Technology, VIT University, Vellore, Tamil Nadu India
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12
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Intanon M, Arreola SL, Pham NH, Kneifel W, Haltrich D, Nguyen TH. Nature and biosynthesis of galacto-oligosaccharides related to oligosaccharides in human breast milk. FEMS Microbiol Lett 2014; 353:89-97. [PMID: 24571717 PMCID: PMC4107629 DOI: 10.1111/1574-6968.12407] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Accepted: 02/19/2014] [Indexed: 11/29/2022] Open
Abstract
Human milk oligosaccharides (HMO) are prominent among the functional components of human breast milk. While HMO have potential applications in both infants and adults, this potential is limited by the difficulties in manufacturing these complex structures. Consequently, functional alternatives such as galacto-oligosaccharides are under investigation, and nowadays, infant formulae are supplemented with galacto-oligosaccharides to mimic the biological effects of HMO. Recently, approaches toward the production of defined human milk oligosaccharide structures using microbial, fermentative methods employing single, appropriately engineered microorganisms were introduced. Furthermore, galactose-containing hetero-oligosaccharides have attracted an increasing amount of attention because they are structurally more closely related to HMO. The synthesis of these novel oligosaccharides, which resemble the core of HMO, is of great interest for applications in the food industry.
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Affiliation(s)
- Montira Intanon
- Department of Food Sciences and Technology, Food Biotechnology Laboratory, BOKU University of Natural Resources and Life Sciences, Vienna, Austria
| | - Sheryl Lozel Arreola
- Department of Food Sciences and Technology, Food Biotechnology Laboratory, BOKU University of Natural Resources and Life Sciences, Vienna, Austria
- Institute of Chemistry, University of the Philippines Los Baños, College, Laguna, Philippines
| | - Ngoc Hung Pham
- Department of Food Sciences and Technology, Food Biotechnology Laboratory, BOKU University of Natural Resources and Life Sciences, Vienna, Austria
| | - Wolfgang Kneifel
- Department of Food Sciences and Technology, Food Quality Assurance Laboratory, BOKU University of Natural Resources and Life Sciences, Vienna, Austria
| | - Dietmar Haltrich
- Department of Food Sciences and Technology, Food Biotechnology Laboratory, BOKU University of Natural Resources and Life Sciences, Vienna, Austria
| | - Thu-Ha Nguyen
- Department of Food Sciences and Technology, Food Biotechnology Laboratory, BOKU University of Natural Resources and Life Sciences, Vienna, Austria
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Pereira-Rodríguez Á, Fernández-Leiro R, González Siso MI, Cerdán ME, Becerra M, Sanz-Aparicio J. Crystallization and preliminary X-ray crystallographic analysis of beta-galactosidase from Kluyveromyces lactis. Acta Crystallogr Sect F Struct Biol Cryst Commun 2010; 66:297-300. [PMID: 20208165 PMCID: PMC2833041 DOI: 10.1107/s1744309109054931] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Accepted: 12/21/2009] [Indexed: 11/11/2022]
Abstract
Beta-galactosidase from Kluyveromyces lactis catalyses the hydrolysis of the beta-galactosidic linkage in lactose. Owing to its many industrial applications, the biotechnological potential of this enzyme is substantial. This protein has been expressed in yeast and purified for crystallization trials. However, optimization of the best crystallization conditions yielded crystals with poor diffraction quality that precluded further structural studies. Finally, the crystal quality was improved using the streak-seeding technique and a complete diffraction data set was collected at 2.8 A resolution.
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Affiliation(s)
- Ángel Pereira-Rodríguez
- Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira s/n, 15071 A Coruña, Spain
| | - Rafael Fernández-Leiro
- Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira s/n, 15071 A Coruña, Spain
- Grupo de Cristalografía Macromolecular y Biología Estructural, Instituto de Química-Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain
| | - M. Isabel González Siso
- Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira s/n, 15071 A Coruña, Spain
| | - M. Esperanza Cerdán
- Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira s/n, 15071 A Coruña, Spain
| | - Manuel Becerra
- Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira s/n, 15071 A Coruña, Spain
| | - Julia Sanz-Aparicio
- Grupo de Cristalografía Macromolecular y Biología Estructural, Instituto de Química-Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain
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Maksimainen M, Timoharju T, Kallio JM, Hakulinen N, Turunen O, Rouvinen J. Crystallization and preliminary diffraction analysis of a beta-galactosidase from Trichoderma reesei. Acta Crystallogr Sect F Struct Biol Cryst Commun 2009; 65:767-9. [PMID: 19652334 PMCID: PMC2720328 DOI: 10.1107/s1744309109023926] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Accepted: 06/22/2009] [Indexed: 11/10/2022]
Abstract
An extracellular beta-galactosidase from Trichoderma reesei was crystallized from sodium cacodylate buffer using polyethylene glycol (PEG) as a precipant. Crystals grown by homogenous streak-seeding belonged to space group P1, with unit-cell parameters a = 67.3, b = 69.1, c = 81.5 A, alpha = 109.1, beta = 97.3, gamma = 114.5 degrees . The crystals diffracted to 1.8 A resolution using a rotating-anode generator and to 1.2 A resolution using a synchrotron source. On the basis of the Matthews coefficient (V(M) = 3.16 A(3) Da(-1)), one molecule is estimated to be present in the asymmetric unit. The aim of the determination of the crystal structure is to increase the understanding of this industrially significant enzyme.
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Affiliation(s)
| | - Tommi Timoharju
- Department of Biotechnology and Chemical Technology, Helsinki University of Technology, Finland
| | | | | | - Ossi Turunen
- Department of Biotechnology and Chemical Technology, Helsinki University of Technology, Finland
| | - Juha Rouvinen
- Department of Chemistry, University of Joensuu, Finland
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