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Cunha JS, Pacheco FC, Martins CCN, Pacheco AFC, Tribst AAL, Leite Júnior BRDC. Use of ultrasound to improve the activity of cyclodextrin glycosyltransferase in the producing of β-cyclodextrins: Impact on enzyme activity, stability and insights into changes on enzyme macrostructure. Food Res Int 2024; 191:114662. [PMID: 39059935 DOI: 10.1016/j.foodres.2024.114662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/22/2024] [Accepted: 06/25/2024] [Indexed: 07/28/2024]
Abstract
This work explored the impact of ultrasound (US) on the activity, stability, and macrostructural conformation of cyclodextrin glycosyltransferase (CGTase) and how these changes could maximize the production of β-cyclodextrins (β-CDs). The results showed that ultrasonic pretreatment (20 kHz and 38 W/L) at pH 6.0 promoted increased enzymatic activity. Specifically, after sonication at 25 °C/30 min, there was a maximum activity increase of 93 % and 68 % when biocatalysis was carried out at 25 and 55 °C, respectively. For activity measured at 80 °C, maximum increase (31 %) was observed after sonication at 25 °C/60 min. Comparatively, US pretreatment at low pH (pH = 4.0) resulted in a lower activity increase (max. 28 %). These activation levels were maintained after 24 h of storage at 8 °C, suggesting that changes on CGTase after ultrasonic pretreatment were not transitory. These pretreatments altered the conformational structure of CGTase, revealed by an up to 11 % increase in intrinsic fluorescence intensity, and resulted in macrostructural modifications, such as a decrease in particle size and polydispersion index (up to 85 % and 45.8 %, respectively). Therefore, the sonication of CGTase under specific conditions of pH, time, and temperature (especially at pH 6.0/ 30 min/ 25 °C) promotes macrostructural changes in CGTase that induce enzyme activation and, consequently, higher production of β-CDs.
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Affiliation(s)
- Jeferson Silva Cunha
- Department of Food Technology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/n, University Campus, 36570-900 Viçosa, MG, Brazil
| | - Flaviana Coelho Pacheco
- Department of Food Technology, Federal University of Viçosa, Av. Peter Henry Rolfs, S/n, University Campus, 36570-900 Viçosa, MG, Brazil
| | - Caio Cesar Nemer Martins
- Department of Forest Science, Federal University of Viçosa, Av. Peter Henry Rolfs, S/n, University Campus, 36570-900 Viçosa, MG, Brazil
| | - Ana Flávia Coelho Pacheco
- Cândido Tostes Dairy Institute, Agricultural Company of Minas Gerais (EPAMIG), 11 Lieutenant Luiz de Freitas, 116, 36045-560 Juiz de Fora, MG, Brazil
| | - Alline Artigiani Lima Tribst
- Núcleo de Estudos e Pesquisas em Alimentação (NEPA), Coordenadoria de Centros e Núcleos Interdisciplinares de Pesquisa (COCEN), Universidade Estadual de Campinas (UNICAMP), Albert Einstein, 291, 13083-852 Campinas, SP, Brazil
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Ogunbadejo BA, Aljahoushi KA, Alzamly A, Greish YE, Al-Zuhair S. Immobilization of Cyclodextrin glycosyltransferase onto three dimensional- hydrophobic and two dimensional- hydrophilic supports: A comparative study. Biotechnol J 2024; 19:e2300195. [PMID: 38037744 DOI: 10.1002/biot.202300195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 12/02/2023]
Abstract
Cyclodextrin glycosyltransferase (CGTase) degrades starch into cyclodextrin via enzymatic activity. In this study, we immobilize CGTase from Thermoanaerobacter sp. on two supports, namely graphene nanoplatelets (GNP) consisting of short stacks of graphene nanoparticles and a calcium-based two-dimensional metal organic framework (Ca-TMA). The uptakes of CGTase on GNP and Ca-TMA reached 40 and 21 mg g-1 respectively, but immobilized CGTase on Ca-TMA showed a higher specific activity (38 U mg-1 ) than that on GNP (28 U mg-1 ). Analysis of secondary structures of CGTase, shows that immobilization reduces the proportion of β-sheets in CGTase from 56% in the free to 49% and 51.3% for GNP and Ca-TMA respectively, α-helix from 38.5% to 18.1 and 37.5%, but led to increased β-turns from 5.5 to 40% and 11.2% for GNP and Ca-TMA, respectively. Lower levels of conformational changes were observed over the more hydrophilic Ca-TMA compared to hydrophobic GNP, resulting in its better activity. Increased β-turns were found to correlate with lower β-CD production, while more β-sheets and α-helix favored more β-CD. Reusability studies revealed that GNP retains up to 74% of initial CGTase activity, while Ca-TMA dropped to 33% after eight consecutive uses. The results obtained in this work provide insight on the effect of support's surface properties on CGTase performance and can assist in developing robust CGTase-based biocatalysts for industrial application.
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Affiliation(s)
- Babatunde A Ogunbadejo
- Department of Chemical and Petroleum Engineering, UAE University, Al Ain, United Arab Emirates
| | | | - Ahmed Alzamly
- Department of Chemistry, UAE University, Al Ain, United Arab Emirates
| | - Yaser E Greish
- Department of Chemistry, UAE University, Al Ain, United Arab Emirates
- Zayed Centre for Health Sciences, UAE University, Al Ain, United Arab Emirates
| | - Sulaiman Al-Zuhair
- Department of Chemical and Petroleum Engineering, UAE University, Al Ain, United Arab Emirates
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Preparation and characterization of a novel 3D polymer support for the immobilization of cyclodextrin glucanotransferase and efficient biocatalytic synthesis of α-arbutin. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Koga LN, Fenelon VC, Miyoshi JH, Moriwaki C, Wessel KBB, Mangolim CS, Matioli G. Economic model for obtaining cyclodextrins from commercial cgtase. BRAZ J PHARM SCI 2020. [DOI: 10.1590/s2175-97902020000118993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Gimenez GG, Silva RM, Francisco CP, Rando FDS, Dantas JH, de Souza HM, Matioli G. Immobilization of commercial cyclomaltodextrin glucanotransferase into controlled pore silica by the anchorage method and covalent bonding. Process Biochem 2019. [DOI: 10.1016/j.procbio.2019.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Preparation of Crosslinked Enzyme Aggregates of a Thermostable Cyclodextrin Glucosyltransferase from Thermoanaerobacter sp. Critical Effect of the Crosslinking Agent. Catalysts 2019. [DOI: 10.3390/catal9020120] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Crosslinked enzyme aggregates (CLEAs) of a thermostable cyclodextrin glucosyltransferase (CGTase) from Thermoanaerobacter sp. have been prepared for the production of cyclodextrins (CDs). Different parameters in the precipitation (nature and concentration of precipitant) and crosslinking steps (time of reaction with cross-linker, nature and concentration of the crosslinker) were evaluated on the production of CLEAs of CGTase. Among the seven studied precipitants, acetone with a 75% (v/v) concentration produced the aggregates of CGTase with higher activity, which retained 97% of the initial activity. Concerning the cross-linker (glutaraldehyde, starch–aldehyde, and pectin–aldehyde), starch–aldehyde produced the most active CLEAs. The use of bovine serum albumin as co-feeder decreased the expressed activity. Addition of polyethylenimine at the end of cross-linking step prevented the leakage of the enzyme and the subsequent Schiff’s bases reduction with sodium borohydride permitted to maintain 24% of the initial activity even with the large dextrin as substrate. The optimal conditions for the immobilization process required were defined as 75% (v/v) acetone as precipitation reagent for 1 h at 20 °C, 20 mM starch–aldehyde as crosslinking reagent for 2 h at 20 °C, treatment with 1 mg/mL of polyethylenimine for 5 min, reduction with 1 mg/mL of sodium borohydride. The CLEAs of CGTase were active catalyst (similarly to the free enzyme) in the production of cyclodextrins at 50 °C and pH 6.0 for 6 h reaction, maintaining intact their structures. Besides this, after five cycles of 3 h the total cyclodextrin yield was 80% of the initial value (first batch, with around 45% CD yield).
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Li C, Chen S, Gu Z, Hong Y, Cheng L, Li Z. Enhancement of α-CGTase thermostability with the addition of calcium or barium ions. FOOD BIOSCI 2018. [DOI: 10.1016/j.fbio.2018.10.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Cieh NL, Sulaiman S, Mokhtar MN, Naim MN. Bleached kenaf microfiber as a support matrix for cyclodextrin glucanotransferase immobilization via covalent binding by different coupling agents. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.02.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Schöffer JDN, Matte CR, Charqueiro DS, de Menezes EW, Costa TMH, Benvenutti EV, Rodrigues RC, Hertz PF. Effects of immobilization, pH and reaction time in the modulation of α-, β- or γ-cyclodextrins production by cyclodextrin glycosyltransferase: Batch and continuous process. Carbohydr Polym 2017; 169:41-49. [PMID: 28504163 DOI: 10.1016/j.carbpol.2017.04.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/28/2017] [Accepted: 04/03/2017] [Indexed: 12/26/2022]
Abstract
This study reports the immobilization of a β-CGTase on glutaraldehyde pre-activated silica and its use to production of cyclodextrins in batch and continuous reactions. We were able to modulate the cyclodextrin production (α-, β- and γ-CD) by immobilization and changing the reaction conditions. In batch reactions, the immobilized enzyme reached to maximum productions of 4.9mgmL-1 of α-CD, 3.6mgmL-1 of β-CD and 3.5mgmL-1 of γ-CD at different conditions of temperature, pH and reaction time. In continuous reactor, varying the residence time and pH it was possible to produce at pH 4.0 and 141min of residence time preferentially γ-CD (0.75 and 3.36mgmL-1 of α- and γ-CD, respectively), or at pH 8.0 and 4.81min α- and β-CDs (3.44 and 3.51mgmL-1).
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Affiliation(s)
- Jéssie da Natividade Schöffer
- Grupo de Biotecnologia, Bioprocessos e Biocatálise, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Carla Roberta Matte
- Grupo de Biotecnologia, Bioprocessos e Biocatálise, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Douglas Santana Charqueiro
- Laboratório de Sólidos e Superfície, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Eliana Weber de Menezes
- Laboratório de Sólidos e Superfície, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Tania Maria Haas Costa
- Laboratório de Sólidos e Superfície, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Edilson Valmir Benvenutti
- Laboratório de Sólidos e Superfície, Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Rafael C Rodrigues
- Grupo de Biotecnologia, Bioprocessos e Biocatálise, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
| | - Plinho Francisco Hertz
- Grupo de Biotecnologia, Bioprocessos e Biocatálise, Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
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Covalent immobilization of cyclodextrin glucanotransferase on kenaf cellulose nanofiber and its application in ultrafiltration membrane system. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.01.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Ulker C, Gokalp N, Guvenilir Y. Immobilization of Candida antarctica lipase B (CALB) on surface-modified rice husk ashes (RHA) via physical adsorption and cross-linking methods. BIOCATAL BIOTRANSFOR 2016. [DOI: 10.1080/10242422.2016.1247818] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Cansu Ulker
- Istanbul Technical University, Istanbul, Turkey
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Zhang DH, Chen N, Yang MN, Dou YF, Sun J, Liu YD, Zhi GY. Effects of different spacer arms on Cibacron Blue modification and protein affinity adsorption on magnetic microspheres. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2016.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tian L, Zhao P, Li X, Ali Z, Li X, Zhang B, Zhang H, Zhang Q. Design of Raspberry-Shaped Microcarriers with Adjustable Protrusions and Functional Groups for the Improvement of Lipase Immobilization and Biocatalysis: Environmentally Friendly Esterification of Oleic Acid for Biodiesel. ChemCatChem 2016. [DOI: 10.1002/cctc.201600413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Lei Tian
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 P. R. China
- The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education; Northwestern Polytechnical University; Xi'an 710072 P. R. China
| | - Panpan Zhao
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 P. R. China
- The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education; Northwestern Polytechnical University; Xi'an 710072 P. R. China
| | - Xue Li
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 P. R. China
- The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education; Northwestern Polytechnical University; Xi'an 710072 P. R. China
| | - Zafar Ali
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 P. R. China
- The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education; Northwestern Polytechnical University; Xi'an 710072 P. R. China
| | - Xiangjie Li
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 P. R. China
- The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education; Northwestern Polytechnical University; Xi'an 710072 P. R. China
| | - Baoliang Zhang
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 P. R. China
- The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education; Northwestern Polytechnical University; Xi'an 710072 P. R. China
| | - Hepeng Zhang
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 P. R. China
- The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education; Northwestern Polytechnical University; Xi'an 710072 P. R. China
| | - Qiuyu Zhang
- Department of Applied Chemistry, School of Science; Northwestern Polytechnical University; Xi'an 710072 P. R. China
- The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education; Northwestern Polytechnical University; Xi'an 710072 P. R. China
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Immobilization of Glycoside Hydrolase Families GH1, GH13, and GH70: State of the Art and Perspectives. Molecules 2016; 21:molecules21081074. [PMID: 27548117 PMCID: PMC6274110 DOI: 10.3390/molecules21081074] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 08/11/2016] [Accepted: 08/12/2016] [Indexed: 12/20/2022] Open
Abstract
Glycoside hydrolases (GH) are enzymes capable to hydrolyze the glycosidic bond between two carbohydrates or even between a carbohydrate and a non-carbohydrate moiety. Because of the increasing interest for industrial applications of these enzymes, the immobilization of GH has become an important development in order to improve its activity, stability, as well as the possibility of its reuse in batch reactions and in continuous processes. In this review, we focus on the broad aspects of immobilization of enzymes from the specific GH families. A brief introduction on methods of enzyme immobilization is presented, discussing some advantages and drawbacks of this technology. We then review the state of the art of enzyme immobilization of families GH1, GH13, and GH70, with special attention on the enzymes β-glucosidase, α-amylase, cyclodextrin glycosyltransferase, and dextransucrase. In each case, the immobilization protocols are evaluated considering their positive and negative aspects. Finally, the perspectives on new immobilization methods are briefly presented.
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Saallah S, Naim MN, Lenggoro IW, Mokhtar MN, Abu Bakar NF, Gen M. Immobilisation of cyclodextrin glucanotransferase into polyvinyl alcohol (PVA) nanofibres via electrospinning. ACTA ACUST UNITED AC 2016; 10:44-48. [PMID: 28352523 PMCID: PMC5040860 DOI: 10.1016/j.btre.2016.03.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 03/07/2016] [Accepted: 03/07/2016] [Indexed: 11/16/2022]
Abstract
Fabrication of enzyme-carrying polymeric nanofibers by electrospinning. PVA nanofibers structure and size were not affected by the addition of enzyme. The electrospun CGTase/PVA nanofibers show excellent immobilisation efficiency.
Immobilisation of cyclodextrin glucanotransferase (CGTase) on nanofibres was demonstrated. CGTase solution (1% v/v) and PVA (8 wt%) solution were mixed followed by electrospinning (−9 kV, 3 h). CGTase/PVA nanofibres with an average diameter of 176 ± 46 nm were successfully produced. The nanofibres that consist of immobilised CGTase were crosslinked with glutaraldehyde vapour. A CGTase/PVA film made up from the same mixture and treated the same way was used as a control experiment. The immobilised CGTase on nanofibres showed superior performance with nearly a 2.5 fold higher enzyme loading and 31% higher enzyme activity in comparison with the film.
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Affiliation(s)
- Suryani Saallah
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan; Biotechnology Research Institute, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia
| | - M Nazli Naim
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - I Wuled Lenggoro
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan; Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Mohd Noriznan Mokhtar
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Noor Fitrah Abu Bakar
- Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Masao Gen
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan; Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
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Amiri A, Mohamad R, Rahim RA, Illias RM, Namvar F, Tan JS, Abbasiliasi S. Cyclodextrin glycosyltransferase biosynthesis improvement by recombinantLactococcus lactisNZ:NSP:CGT: medium formulation and culture condition optimization. BIOTECHNOL BIOTEC EQ 2015. [DOI: 10.1080/13102818.2015.1009713] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Sulaiman S, Mokhtar MN, Naim MN, Baharuddin AS, Sulaiman A. A Review: Potential Usage of Cellulose Nanofibers (CNF) for Enzyme Immobilization via Covalent Interactions. Appl Biochem Biotechnol 2014; 175:1817-42. [DOI: 10.1007/s12010-014-1417-x] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 11/17/2014] [Indexed: 12/29/2022]
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Wang J, Ji F, Xing J, Cui S, Bao Y, Hao W. Lipase Immobilization onto the Surface of PGMA-b-PDMAEMA-grafted Magnetic Nanoparticles Prepared via Atom Transfer Radical Polymerization. Chin J Chem Eng 2014. [DOI: 10.1016/j.cjche.2014.09.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Song X, Jiang Z, Li L, Wu H. Immobilization of β-glucuronidase in lysozyme-induced biosilica particles to improve its stability. Front Chem Sci Eng 2014. [DOI: 10.1007/s11705-014-1421-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ibrahim AS, Al-Salamah AA, El-Toni AM, El-Tayeb MA, Elbadawi YB. Cyclodextrin glucanotransferase immobilization onto functionalized magnetic double mesoporous core–shell silica nanospheres. ELECTRON J BIOTECHN 2014. [DOI: 10.1016/j.ejbt.2014.01.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Continuous production of β-cyclodextrin from starch by highly stable cyclodextrin glycosyltransferase immobilized on chitosan. Carbohydr Polym 2013; 98:1311-6. [DOI: 10.1016/j.carbpol.2013.07.044] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 07/17/2013] [Accepted: 07/19/2013] [Indexed: 11/23/2022]
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Ibrahim ASS, Al-Salamah AA, El-Tayeb MA, El-Badawi YB, Antranikian G. A novel cyclodextrin glycosyltransferase from Alkaliphilic Amphibacillus sp. NPST-10: purification and properties. Int J Mol Sci 2012; 13:10505-10522. [PMID: 22949876 PMCID: PMC3431874 DOI: 10.3390/ijms130810505] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 08/05/2012] [Accepted: 08/10/2012] [Indexed: 12/19/2022] Open
Abstract
Screening for cyclodextrin glycosyltransferase (CGTase)-producing alkaliphilic bacteria from samples collected from hyper saline soda lakes (Wadi Natrun Valley, Egypt), resulted in isolation of potent CGTase producing alkaliphilic bacterium, termed NPST-10. 16S rDNA sequence analysis identified the isolate as Amphibacillus sp. CGTase was purified to homogeneity up to 22.1 fold by starch adsorption and anion exchange chromatography with a yield of 44.7%. The purified enzyme was a monomeric protein with an estimated molecular weight of 92 kDa using SDS-PAGE. Catalytic activities of the enzyme were found to be 88.8 U mg−1 protein, 20.0 U mg−1 protein and 11.0 U mg−1 protein for cyclization, coupling and hydrolytic activities, respectively. The enzyme was stable over a wide pH range from pH 5.0 to 11.0, with a maximal activity at pH 8.0. CGTase exhibited activity over a wide temperature range from 45 °C to 70 °C, with maximal activity at 50 °C and was stable at 30 °C to 55 °C for at least 1 h. Thermal stability of the purified enzyme could be significantly improved in the presence of CaCl2. Km and Vmax values were estimated using soluble starch as a substrate to be 1.7 ± 0.15 mg/mL and 100 ± 2.0 μmol/min, respectively. CGTase was significantly inhibited in the presence of Co2+, Zn2+, Cu2+, Hg2+, Ba2+, Cd2+, and 2-mercaptoethanol. To the best of our knowledge, this is the first report of CGTase production by Amphibacillus sp. The achieved high conversion of insoluble raw corn starch into cyclodextrins (67.2%) with production of mainly β-CD (86.4%), makes Amphibacillus sp. NPST-10 desirable for the cyclodextrin production industry.
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Affiliation(s)
- Abdelnasser S. S. Ibrahim
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia; E-Mails: (A.A.A.-S.); (M.A.E.-T.); (Y.B.E.-B.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel./Fax: +966-1-4675870
| | - Ali A. Al-Salamah
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia; E-Mails: (A.A.A.-S.); (M.A.E.-T.); (Y.B.E.-B.)
| | - Mohamed A. El-Tayeb
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia; E-Mails: (A.A.A.-S.); (M.A.E.-T.); (Y.B.E.-B.)
| | - Yahya B. El-Badawi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia; E-Mails: (A.A.A.-S.); (M.A.E.-T.); (Y.B.E.-B.)
| | - Garabed Antranikian
- Institute of Technical Microbiology, Hamburg University of Technology, Kasernenstrasse 12, 21073 Hamburg, Germany; E-Mail:
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