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Kotik M, Kulik N, Valentová K. Flavonoids as Aglycones in Retaining Glycosidase-Catalyzed Reactions: Prospects for Green Chemistry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:14890-14910. [PMID: 37800688 PMCID: PMC10591481 DOI: 10.1021/acs.jafc.3c04389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/30/2023] [Accepted: 09/18/2023] [Indexed: 10/07/2023]
Abstract
Flavonoids and their glycosides are abundant in many plant-based foods. The (de)glycosylation of flavonoids by retaining glycoside hydrolases has recently attracted much interest in basic and applied research, including the possibility of altering the glycosylation pattern of flavonoids. Research in this area is driven by significant differences in physicochemical, organoleptic, and bioactive properties between flavonoid aglycones and their glycosylated counterparts. While many flavonoid glycosides are present in nature at low levels, some occur in substantial quantities, making them readily available low-cost glycosyl donors for transglycosylations. Retaining glycosidases can be used to synthesize natural and novel glycosides, which serve as standards for bioactivity experiments and analyses, using flavonoid glycosides as glycosyl donors. Engineered glycosidases also prove valuable for the synthesis of flavonoid glycosides using chemically synthesized activated glycosyl donors. This review outlines the bioactivities of flavonoids and their glycosides and highlights the applications of retaining glycosidases in the context of flavonoid glycosides, acting as substrates, products, or glycosyl donors in deglycosylation or transglycosylation reactions.
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Affiliation(s)
- Michael Kotik
- Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ-14200 Prague 4, Czech Republic
| | - Natalia Kulik
- Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ-14200 Prague 4, Czech Republic
| | - Kateřina Valentová
- Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ-14200 Prague 4, Czech Republic
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Mai Z, Wang L, Zeng Q. Characterization of a novel isoflavone glycoside-hydrolyzing β-glucosidase from mangrove soil metagenomic library. Biochem Biophys Res Commun 2021; 569:61-65. [PMID: 34229124 DOI: 10.1016/j.bbrc.2021.06.086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/22/2021] [Accepted: 06/25/2021] [Indexed: 11/21/2022]
Abstract
For the beneficial pharmacological properties of isoflavonoids and their related glycoconjugates, there is increasingly interest in their enzymatic conversion. In this study, a novel β-glucosidase gene isolated from metagenomic library of mangrove sediment was cloned and overexpressed in Escherichia coli BL21(DE3). The purified recombination β-glucosidase, designated as r-Bgl66, showed high catalytic activity for soy isoflavone glycosides. It converted soy isoflavone flour extract with the productivities of 0.87 mM/h for daidzein, 0.59 mM/h for genistein and 0.42 mM/h for glycitein. The kcat/Km values for daidzin, genistin and glycitin were 208.73, 222.37 and 288.07 mM-1 s-1, respectively. In addition, r-Bgl66 also exhibited the characteristic of glucose-tolerance, and the inhibition constant Ki was 471.4 mM. These properties make it a good candidate in the enzymatic hydrolysis of soy isoflavone glycosides. This study also highlights the utility of metagenomic approach in discovering novel β-glucosidase for soy isoflavone glycosides hydrolysis.
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Affiliation(s)
- Zhimao Mai
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.
| | - Lin Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Qi Zeng
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
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Unconventional β-Glucosidases: A Promising Biocatalyst for Industrial Biotechnology. Appl Biochem Biotechnol 2021; 193:2993-3016. [PMID: 33871765 DOI: 10.1007/s12010-021-03568-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 04/08/2021] [Indexed: 10/21/2022]
Abstract
β-Glucosidases primarily catalyze removal of terminal glucosyl residues from a variety of glucoconjugates and also perform transglycosylation and reverse hydrolysis. These catalytic properties can be readily exploited for degradation of lignocellulosic biomass as well as for pharmaceutical, food and flavor industries. β-Glucosidases have been either isolated in the native form from the producer organism or recombinantly expressed and gaged for their biochemical properties and substrate specificities. Although almond and Aspergillus niger have been instantly recognizable sources of β-glucosidases utilized for various applications, an intricate pool of novel β-glucosidases from different sources can provide their potent replacements. Moreover, one can envisage the better efficacy of these novel candidates in biofuel and biorefinery industries facilitating efficient degradation of biomass. This article reviews properties of the novel β-glucosidases such as glucose tolerance and activation, substrate specificity, and thermostability which can be useful for their applications in lignocellulose degradation, food industry, and pharmaceutical industry in comparison with the β-glucosidases from the conventional sources. Such β-glucosidases have potential for encouraging white biotechnology.
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Purification and enzymatic characterization of secretory glycoside hydrolase family 3 (GH3) aryl β-glucosidases screened from Aspergillus oryzae genome. J Biosci Bioeng 2015; 120:614-23. [DOI: 10.1016/j.jbiosc.2015.03.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 03/19/2015] [Accepted: 03/28/2015] [Indexed: 01/28/2023]
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Conversion of Isoflavone Glucosides to Aglycones by Partially Purified β-Glucosidases from Microbial and Vegetable Sources. Appl Biochem Biotechnol 2015; 176:1659-72. [DOI: 10.1007/s12010-015-1668-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 05/12/2015] [Indexed: 10/23/2022]
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Byun DH, Choi HJ, Lee HW, Jeon HY, Choung WJ, Shim JH. Properties and applications of β-glycosidase fromBacteroides thetaiotaomicronthat specifically hydrolyses isoflavone glycosides. Int J Food Sci Technol 2015. [DOI: 10.1111/ijfs.12786] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Da-Hye Byun
- Department of Food Science and Nutrition; and Center for Aging and Health Care; Hallym University; 1 Hallymdaehak-gil Chuncheon Gwangwon-do 200-702 Korea
| | - Hye-Jeong Choi
- Department of Food Science and Nutrition; and Center for Aging and Health Care; Hallym University; 1 Hallymdaehak-gil Chuncheon Gwangwon-do 200-702 Korea
| | - Hye-Won Lee
- Department of Food Science and Nutrition; and Center for Aging and Health Care; Hallym University; 1 Hallymdaehak-gil Chuncheon Gwangwon-do 200-702 Korea
| | - Hye-Yeon Jeon
- Department of Food Science and Nutrition; and Center for Aging and Health Care; Hallym University; 1 Hallymdaehak-gil Chuncheon Gwangwon-do 200-702 Korea
| | - Woo-Jae Choung
- Department of Food Science and Nutrition; and Center for Aging and Health Care; Hallym University; 1 Hallymdaehak-gil Chuncheon Gwangwon-do 200-702 Korea
| | - Jae-Hoon Shim
- Department of Food Science and Nutrition; and Center for Aging and Health Care; Hallym University; 1 Hallymdaehak-gil Chuncheon Gwangwon-do 200-702 Korea
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A β-glucosidase from Novosphingobium sp. GX9 with high catalytic efficiency toward isoflavonoid glycoside hydrolysis and (+)-catechin transglycosylation. Appl Microbiol Biotechnol 2014; 98:7069-79. [DOI: 10.1007/s00253-014-5661-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 02/25/2014] [Accepted: 03/04/2014] [Indexed: 10/25/2022]
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Maitan-Alfenas GP, de A Lage LG, de Almeida MN, Visser EM, de Rezende ST, Guimarães VM. Hydrolysis of soybean isoflavones by Debaryomyces hansenii UFV-1 immobilised cells and free β-glucosidase. Food Chem 2014; 146:429-36. [PMID: 24176363 DOI: 10.1016/j.foodchem.2013.09.099] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 09/02/2013] [Accepted: 09/16/2013] [Indexed: 11/24/2022]
Abstract
An intracellular β-glucosidase from Debaryomyceshansenii UFV-1 was produced in an YP medium with cellobiose as the carbon source. This enzyme was purified, characterised and presented a Mr of 65.15kDa. Yeast cells containing the intracellular β-glucosidase were immobilised in calcium alginate. The free β-glucosidase and immobilised cells containing the enzyme presented optima values of pH and temperature of 6.0 and 45°C and 5.5 and 50°C, respectively. The free enzyme maintained 62% and 47% of its original activity after 90days at 4°C and after 15days at room temperature, respectively. The immobilisation process resulted in higher enzyme thermostability at 45 and 50°C. Soy molasses treatment with the free enzyme and the immobilised cells containing β-glucosidase, for 2h at 40°C, promoted efficient hydrolysis of isoflavone glicosides to their aglycon forms. The results suggest that this enzyme could be used in the food industry, in the free or immobilised forms, for a safe and efficient process to hydrolyse isoflavone glycosides in soy molasses.
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Affiliation(s)
- Gabriela P Maitan-Alfenas
- Dep. Bioquímica e Biologia Molecular, BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG 36.570-000, Brazil
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Lee SH, Seo MH, Oh DK. Deglycosylation of isoflavones in isoflavone-rich soy germ flour by Aspergillus oryzae KACC 40247. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:12101-10. [PMID: 24266868 DOI: 10.1021/jf403130n] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Aspergillus oryzae KACC 40247 was selected as an efficient daidzein-producing fungus from strains of the genus Aspergillus by using 5% (w/v) soy germ flour (SGF) as an isoflavone-glycoside-rich medium. The culture conditions, including SGF concentration, agitation speed, initial pH, temperature, and time, were optimized as follows: 7% (w/v) SGF, initial pH 6.0, 33 °C, 300 rpm, and 24 h in a 100 mL baffled flask. The determined amount of isoflavone aglycons in SGF using 50% ethyl acetate was the highest among the solvent systems tested and it was 3.7-fold higher than that using 70% methanol. Under the optimized conditions, the content and concentration of daidzein were 134 mg/g of SGF and 9.4 g/L, respectively, with a productivity of 391 ± 2.8 mg/L/h, and those of isoflavone aglycons were 165 mg/g of SGF and 11.5 g/L, respectively, with a productivity of 479 mg/L/h. Optimization of culture conditions increased the content, concentration, and productivity of isoflavone aglycons by 3.1-, 3.0-, and 3.7-fold, respectively. To our knowledge, this is the highest production of isoflavone aglycons reported to date.
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Affiliation(s)
- Seon-Hwa Lee
- Department of Bioscience and Biotechnology, Konkuk University , Seoul 143-701, Republic of Korea
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Wang Q, Qian C, Zhang XZ, Liu N, Yan X, Zhou Z. Characterization of a novel thermostable β-glucosidase from a metagenomic library of termite gut. Enzyme Microb Technol 2012; 51:319-24. [DOI: 10.1016/j.enzmictec.2012.07.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/13/2012] [Accepted: 07/17/2012] [Indexed: 10/28/2022]
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11
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SANTOS R, OLIVEIRA C, VARÉA G, ORRADI DA SILVA M, IDA E, MANDARINO J, CARRÃO-PANIZZI M, RIBEIRO M. PURIFICATION AND CHARACTERIZATION OF SOY COTYLEDON β-GLUCOSIDASE. J Food Biochem 2012. [DOI: 10.1111/j.1745-4514.2011.00632.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Yeom SJ, Kim BN, Kim YS, Oh DK. Hydrolysis of isoflavone glycosides by a thermostable β-glucosidase from Pyrococcus furiosus. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:1535-41. [PMID: 22251001 DOI: 10.1021/jf204432g] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The recombinant β-glucosidase from the hyperthermophilic archaeon Pyrococcus furiosus was purified with a specific activity of 330 U/mg for genistin by His-trap chromatography. The specific activity of the purified enzyme followed the order genistin > daidzin > glycitin> malonyl glycitin > malonyl daidzin > malonyl genistin. The hydrolytic activity for genistin was highest at pH 6.0 and 95 °C with a half-life of 59 h, a K(m) of 0.5 mM, and a k(cat) of 6050 1/s. The enzyme completely hydrolyzed 1.0 mM genistin, daidzin, and glycitin within 100, 140, and 180 min, respectively. The soybean flour extract at 7.5% (w/v) contained 1.0 mM genistin, 0.9 mM daidzin, and 0.3 mM glycitin. Genistin, daidzin, and glycitin in the soybean flour extract were completely hydrolyzed after 60, 75, and 120 min, respectively. Of the reported β-glucosidases, P. furiosusβ-glucosidase exhibited the highest thermostability, k(cat), k(cat)/K(m), yield, and productivity for hydrolyzing genistin. These results suggest that this enzyme may be useful for the industrial hydrolysis of isoflavone glycosides.
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Affiliation(s)
- Soo-Jin Yeom
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Republic of Korea
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13
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Chen L, Li N, Zong MH. A glucose-tolerant β-glucosidase from Prunus domestica seeds: Purification and characterization. Process Biochem 2012. [DOI: 10.1016/j.procbio.2011.10.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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14
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Kim YS, Yeom SJ, Oh DK. Characterization of a GH3 family β-glucosidase from Dictyoglomus turgidum and its application to the hydrolysis of isoflavone glycosides in spent coffee grounds. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:11812-11818. [PMID: 21919440 DOI: 10.1021/jf2025192] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A recombinant β-glucosidase from Dictyoglomus turgidum was purified with a specific activity of 31 U/mg by His-Trap affinity chromatography. D. turgidum β-glucosidase was identified as a memmber of the glycoside hydrolase (GH) 3 family on the basis of its amino acid sequence. The native enzyme existed as an 86 kDa monomer with an activity maximum at pH 5 and 85 °C with a half-life of 334 min. The hydrolytic activity of the enzyme with aryl-glycoside substrates was the highest for p-nitrophenyl (pNP)-β-D-glucopyranoside (with a K(m) of 1.3 mM and a k(cat) of 13900 1/s), followed by oNP-β-D-glucopyranoside, pNP-β-D-xylopyranoside, pNP-β-D-fucopyranoside, and pNP-β-D-galactopyranoside. However, no activity was observed for oNP-β-D-galactopyranoside, pNP-α-D-glucopyranoside, pNP-α-D-glucopyranoside, pNP-β-D-mannopyranoside, pNP-β-L-arabinopyranoside, and pNP-α-L-rhamnopyranoside. The hydrolytic activity of the β-glucosidase for coffee isoflavones followed the order genistin (with a K(m) of 0.67 mM and a k(cat) of 5750 1/s) > daidzin > ononin > glycitin. The concentrations of daidzin in ground coffee and spent coffee grounds were 160 and 107 μg/g, respectively, but other isoflavones were present at low concentrations or absent. The enzyme completely hydrolyzed 1.2 mM daidzin in spent coffee grounds after 2 h, with a productivity of 0.6 mM/h. This is the first report concerning the enzymatic hydrolysis of isoflavone glycosides in spent coffee grounds.
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Affiliation(s)
- Yeong-Su Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Republic of Korea
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Kim BN, Yeom SJ, Kim YS, Oh DK. Characterization of a β-glucosidase from Sulfolobus solfataricus for isoflavone glycosides. Biotechnol Lett 2011; 34:125-9. [DOI: 10.1007/s10529-011-0739-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Accepted: 08/24/2011] [Indexed: 11/27/2022]
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16
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Determination of soybean isoflavones in soybean meal and fermented soybean meal by micellar electrokinetic capillary chromatography (MECC). Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.11.168] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Song X, Xue Y, Wang Q, Wu X. Comparison of three thermostable β-glucosidases for application in the hydrolysis of soybean isoflavone glycosides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:1954-61. [PMID: 21294581 DOI: 10.1021/jf1046915] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
A novel thermostable β-glucosidase (Te-BglA) from Thermoanaerobacter ethanolicus JW200 was cloned, characterized and compared for its activity against isoflavone glycosides with two β-glucosidases (Tm-BglA, Tm-BglB) from Thermotoga maritima. Te-BglA exhibited maximum hydrolytic activity toward pNP-β-d-glucopyranoside (pNPG) at 80 °C and pH 7.0, was stable for a pH range of 4.6-7.8 and at 65 °C for 3 h, and had the lowest K(m) for the natural glycoside salicin and the highest relative substrate specificity (k(cat)/K(m))((salicin))/(k(cat)/K(m))((pNPG)) among the three enzymes. It converted isoflavone glycosides, including malonyl glycosides, in soybean flour to their aglycons more efficiently than Tm-BglA and Tm-BglB. After 3 h of incubation at 65 °C, Te-BglA produced complete hydrolysis of four isoflavone glycosides (namely, daidzin, genistin and their malonylated forms), exhibiting higher productivity of genistein and daidzein than the other two β-glucosidases. Our results suggest that Te-BglA is preferable to Tm-BglA and Tm-BglB, but all three enzymes have great potential applications in converting isoflavone glycosides into their aglycons.
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Affiliation(s)
- Xiangfei Song
- Jiangsu Key Laboratory for Microbes and Functional Genomics, College of Life Science, Nanjing Normal University, Nanjing, PR China 210046
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Identification of a Saccharomyces cerevisiae glucosidase that hydrolyzes flavonoid glucosides. Appl Environ Microbiol 2011; 77:1751-7. [PMID: 21216897 DOI: 10.1128/aem.01125-10] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Baker's yeast (Saccharomyces cerevisiae) whole-cell bioconversions of naringenin 7-O-β-glucoside revealed considerable β-glucosidase activity, which impairs any strategy to generate or modify flavonoid glucosides in yeast transformants. Up to 10 putative glycoside hydrolases annotated in the S. cerevisiae genome database were overexpressed with His tags in yeast cells. Examination of these recombinant, partially purified polypeptides for hydrolytic activity with synthetic chromogenic α- or β-glucosides identified three efficient β-glucosidases (EXG1, SPR1, and YIR007W), which were further assayed with natural flavonoid β-glucoside substrates and product verification by thin-layer chromatography (TLC) or high-performance liquid chromatography (HPLC). Preferential hydrolysis of 7- or 4'-O-glucosides of isoflavones, flavonols, flavones, and flavanones was observed in vitro with all three glucosidases, while anthocyanins were also accepted as substrates. The glucosidase activities of EXG1 and SPR1 were completely abolished by Val168Tyr mutation, which confirmed the relevance of this residue, as reported for other glucosidases. Most importantly, biotransformation experiments with knockout yeast strains revealed that only EXG1 knockout strains lost the capability to hydrolyze flavonoid glucosides.
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Borges KB, Pupo MÃT, Bonato PS. Enantioselective analysis of propranolol and 4-hydroxypropranolol by CE with application to biotransformation studies employing endophytic fungi. Electrophoresis 2009; 30:3910-7. [DOI: 10.1002/elps.200900216] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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Yang S, Wang L, Yan Q, Jiang Z, Li L. Hydrolysis of soybean isoflavone glycosides by a thermostable β-glucosidase from Paecilomyces thermophila. Food Chem 2009. [DOI: 10.1016/j.foodchem.2009.01.038] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Overexpression of β-glucosidase from Thermotoga maritima for the production of highly purified aglycone isoflavones from soy flour. World J Microbiol Biotechnol 2009. [DOI: 10.1007/s11274-009-0121-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Ito J, Sahara H, Kaya M, Hata Y, Shibasaki S, Kawata K, Ishida S, Ogino C, Fukuda H, Kondo A. Characterization of yeast cell surface displayed Aspergillus oryzae β-glucosidase 1 high hydrolytic activity for soybean isoflavone. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcatb.2008.01.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Kaya M, Ito J, Kotaka A, Matsumura K, Bando H, Sahara H, Ogino C, Shibasaki S, Kuroda K, Ueda M, Kondo A, Hata Y. Isoflavone aglycones production from isoflavone glycosides by display of beta-glucosidase from Aspergillus oryzae on yeast cell surface. Appl Microbiol Biotechnol 2008; 79:51-60. [PMID: 18340445 DOI: 10.1007/s00253-008-1393-6] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2007] [Revised: 01/29/2008] [Accepted: 01/29/2008] [Indexed: 10/22/2022]
Abstract
For efficient production of isoflavone aglycones from soybean isoflavones, we isolated three novel types of beta-glucosidase (BGL1, BGL3, and BGL5) from the filamentous fungi Aspergillus oryzae. Three enzymes were independently displayed on the cell surface of a yeast Saccharomyces cerevisiae as a fusion protein with alpha-agglutinin. Three beta-glucosidase-displaying yeast strains hydrolyzed isoflavone glycosides efficiently but exhibited different substrate specificities. Among these beta-glucosidases, BGL1 exhibited the highest activity and also broad substrate specificity to isoflavone glycosides. Although glucose released from isoflavone glycosides are generally known to inhibit beta-glucosidase, the residual ratio of isoflavone glycosides in the reaction mixture with BGL1-displaying yeast strain (Sc-BGL1) reached approximately 6.2%, and the glucose concentration in the reaction mixture was maintained at lower level. This result indicated that Sc-BGL1 assimilated the glucose before they inhibited the hydrolysis reaction, and efficient production of isoflavone aglycones was achieved by engineered yeast cells displaying beta-glucosidase.
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Affiliation(s)
- Masahiko Kaya
- Research Institute, Gekkeikan Sake Co Ltd, Kyoto, Japan
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Kuo LC, Lee KT. Cloning, expression, and characterization of two beta-glucosidases from isoflavone glycoside-hydrolyzing Bacillus subtilis natto. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:119-25. [PMID: 18069788 DOI: 10.1021/jf072287q] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
On the basis of the genomic sequence of Bacillus subtilis 168, two beta-glucosidase genes (bglH and yckE) from B. subtilis natto, which has been reported to have high isoflavone glucoside-hydrolyzing activity, were cloned and overexpressed in E. coli M15. The temperature for the optimal p-nitrophenyl-beta-D-glucoside hydrolyzing activity of both enzymes was between 37 and 45 degrees C, but BglH had a higher thermal stability than YckE. Both showed high activity at pH 6.0, but YckE was stable over a wider pH range than BglH. Recombinant BglH was inhibited 73%, 63%, and 43% by 1.0 mM Cd(2+), Fe(2+), or Cu(2+), respectively, while other divalent metal ions resulted in 0-23% inhibition, whereas YckE was inhibited by less than 20% by any of the divalent metal ions we tested. Among the substrate we used, BglH showed the highest affinity for genistin and YckE showed the highest affinity for p-nitrophenyl-beta-D-fructopyranoside. Both BglH and YckE hydrolyzed genistin and daidzin into their isoflavone aglycones, genistein and daidzein, but BglH was more efficient than YckE in isoflavone glucoside hydrolysis (20-fold higher kcat). Our results suggest that recombinant BglH may be applicable in the process of isoflavones deglycosylation.
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Affiliation(s)
- Lun-Cheng Kuo
- Institute of Microbiology and Biochemistry, National Taiwan University, Taipei, Taiwan, ROC
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Ito J, Ebe T, Shibasaki S, Fukuda H, Kondo A. Production of alkyl glucoside from cellooligosaccharides using yeast strains displaying Aspergillus aculeatus β-glucosidase 1. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcatb.2007.08.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ribeiro M, Mandarino J, Carrão-Panizzi M, de Oliveira M, Campo C, Nepomuceno A, Ida E. Isoflavone content and β-glucosidase activity in soybean cultivars of different maturity groups. J Food Compost Anal 2007. [DOI: 10.1016/j.jfca.2006.07.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Rosenblueth M, Martínez-Romero E. Bacterial endophytes and their interactions with hosts. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2006; 19:827-37. [PMID: 16903349 DOI: 10.1094/mpmi-19-0827] [Citation(s) in RCA: 569] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Recent molecular studies on endophytic bacterial diversity have revealed a large richness of species. Endophytes promote plant growth and yield, suppress pathogens, may help to remove contaminants, solubilize phosphate, or contribute assimilable nitrogen to plants. Some endophytes are seedborne, but others have mechanisms to colonize the plants that are being studied. Bacterial mutants unable to produce secreted proteins are impaired in the colonization process. Plant genes expressed in the presence of endophytes provide clues as to the effects of endophytes in plants. Molecular analysis showed that plant defense responses limit bacterial populations inside plants. Some human pathogens, such as Salmonella spp., have been found as endophytes, and these bacteria are not removed by disinfection procedures that eliminate superficially occurring bacteria. Delivery of endophytes to the environment or agricultural fields should be carefully evaluated to avoid introducing pathogens.
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Affiliation(s)
- Mónica Rosenblueth
- Centro de Ciencias Genómicas, Universidad Nacional Autóma de México, Apdo. Postal 565-A, Cuernavaca, México
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Li YY, Jiang CJ, Wan XC, Zhang ZZ, Li DX. Purification and partial characterization of beta-glucosidase from fresh leaves of tea plants (Camellia sinensis (L.) O. Kuntze). Acta Biochim Biophys Sin (Shanghai) 2005; 37:363-70. [PMID: 15944750 DOI: 10.1111/j.1745-7270.2005.00053.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
beta-Glucosidases are important in the formation of floral tea aroma and the development of resistance to pathogens and herbivores in tea plants. A novel beta-glucosidase was purified 117-fold to homogeneity, with a yield of 1.26%, from tea leaves by chilled acetone and ammonium sulfate precipitation, ion exchange chromatography (CM-Sephadex C-50) and fast protein liquid chromatography (FPLC; Superdex 75, Resource S). The enzyme was a monomeric protein with specific activity of 2.57 U/mg. The molecular mass of the enzyme was estimated to be about 41 kDa and 34 kDa by SDS-PAGE and FPLC gel filtration on Superdex 200, respectively. The enzyme showed optimum activity at 50 deg;C and was stable at temperatures lower than 40 degrees C. It was active between pH 4.0 and pH 7.0, with an optimum activity at pH 5.5, and was fairly stable from pH 4.5 to pH 8.0. The enzyme showed maximum activity towards pNPG, low activity towards pNP-Galacto, and no activity towards pNP-Xylo.
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Affiliation(s)
- Ye-Yun Li
- Key Laboratory of Tea Biochemistry and Biotechnology, Ministry of Education, Anhui Agricultural University, Hefei 230036, China
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