Journals / Hacettepe Journal of Biology and Chemistry / 2011 / Cilt: 39 - Sayı: 3

Çapraz bağlı glukoz oksidaz agregatları: Sentez ve karakterizasyonu

Cross-linked glucose oxidase aggregates: Synthesis and characterization

Pages
241–251
Publication Date
2022-10-17
DOI
—
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⚡ TL;DR(Too Long; Didn't Read)

The kinetic parameters were calculated by Lineweaver-Burk plots such as; Km=0.0115 mM; Vm=1.206 mM.min-1 for native enzyme and Km= 0.025 mM; Vm=0.593 mM.min-1 for cross-linking enzyme aggregates.

📌 3 Key Takeaways

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Objective & Hypothesis:The aim of the submitted study is to realize carrier-free immobilization (as cross-linking enzyme aggregates) of Aspergillus niger Glucose Oxidase enzyme, to determinate the optimum immobilization conditions, and to investigate the properties of immobilized enzyme sets.
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Key Findings & Data:The “immobilized enzyme activity” was measured by activity determination method with the use of glucose substrate.
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Conclusion & Impact:The kinetic parameters were calculated by Lineweaver-Burk plots such as; Km=0.0115 mM; Vm=1.206 mM.min-1 for native enzyme and Km= 0.025 mM; Vm=0.593 mM.min-1 for cross-linking enzyme aggregates.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

The aim of the submitted study is to realize carrier-free immobilization (as cross-linking enzyme aggregates) of Aspergillus niger Glucose Oxidase enzyme, to determinate the optimum immobilization conditions, and to investigate the properties of immobilized enzyme sets. Carrier-free enzyme immobilization was realised by forming cross-linked glucose oxidase enzyme aggregates (CLEA’s). Different precipitants were used in different media conditions during forming CLEA’s. The “immobilized enzyme activity” was measured by activity determination method with the use of glucose substrate. The optimum conditions which were determined in the light of the experiments for the cross-linked enzyme aggregates can be summarized as; the initial enzyme concentration, 0.05 mg/ml; the optimum temperature, 25oC; the precipitant type, BSA; the precipitant concentration, 5 mg/ml; the concentration of glutaraldehyde, 2% (v/v). After determining the optimum conditions, glucose solutions at different concentrations (1.0-4.0 mg/dl) were prepared for investigating the performance of the glucose oxidase aggregates. The kinetic parameters were calculated by Lineweaver-Burk plots such as; Km=0.0115 mM; Vm=1.206 mM.min-1 for native enzyme and Km= 0.025 mM; Vm=0.593 mM.min-1 for cross-linking enzyme aggregates.

Özet

Sunulan çalışmanın amacı Aspergillus niger Glukoz Oksidaz enziminin taşıyıcısız immobilizasyonunu (çapraz bağlı enzim agregatları olarak) gerçekleştirmek, en uygun immobilizasyon koşullarını bulmak ve immobilize enzim kümelerinin özelliklerini belirlemektir. Taşıyıcısız enzim immobilizasyonu çapraz bağlı glukoz oksidaz enzim agregatları (ÇBEA) oluşturarak uygulanmıştır. ÇBEA’nın oluşumu sırasında farklı çöktürücüler yine farklı ortamlarda kullanılmıştır. “İmmobilize enzim aktivitesi” aktivite tayin yöntemine göre glukoz substratı kullanılarak ölçülmüştür. Deneylerin sonunda çapraz bağlı enzim agregatları için bulunan ve en yüksek enzim aktivitesini veren en uygun koşullar: başlangıç enzim derişimi, 0.5 mg/ml; en uygun sıcaklık, 25oC; çöktürücü türü, Bovin Serum Albümin (BSA); çöktürücü derişimi, 5 mg/ml; ve glutaraldehit derişimi, % 2 (v/v). En uygun koşulların belirlenmesinden sonra glukoz oksidaz agregatlarının performanslarını belirlemek üzere farklı derişimlere sahip glukoz çözeltileri hazırlandı (1.0 - 4.0 mg/dl). Verilerin Lineweaver-Burk doğrusu olarak çizimi ile kinetik parametreler Km= 0.0115 mM ve Vm=1.206 mM.min-1 serbest enzim için ve ÇBEA için Km= 0.025 mM; Vm=0.593 mM.min-1 olarak hesaplanmıştır.

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Cite This Article

AYHAN, F., DOĞAÇ, İ. Y., AYHAN, H. (2022). Çapraz bağlı glukoz oksidaz agregatları: Sentez ve karakterizasyonu. Hacettepe Journal of Biology and Chemistry, Cilt: 39 - Sayı: 3, 241–251. https://ajindex.com/articles/529218

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References (15)

  1. K. Mosbach, Immobilised enzymes and cells (Part B) Methods Enzymology 1987, Vol. 135
  2. W. Hartmeier, Immobilised Biocatalysts, Springer- Verlag, 1988
  3. S. Rocchietti, A.S.V. Urritia, M. Pregnolata, A. Tagliani, J.M. Guisan, R. Fernandez-Lafuente, M. Tereni; Influence of the enzyme derivative preparation and substrate structure on the enantioselective of penicillin G acylase, Enzyme Microb. Technol., 31 (2002) 88
  4. J.M.S. Cabral, J.F. Kennedy, Immobilisation techniques for altering thermal stability of enzymes, Thermo stability of Enzymes, edited by M.N. Gupta, Berlin, Springer–Verlag, 1993, 163-179
  5. T. Boller, C. Meier, S. Menzler, Eupergit oxirane acrylic beads: how to make the enzyme fit for biocatalysts. Org. Process Res. Develop, 6 (2002) 509
  6. L. Cao, F. van Rantwijk, R.A. Sheldon, Cross-linked enzyme aggregates, a simple and effective method for the immobilisation of penicilin acylase. Org. Lett., 2 (2000) 1361
  7. F. Rothstein, Differential precipitation of proteins: science and technology. In Protein Purification Process Engineering, Edited by R.G. Harrison, New York, Marcel Dekker, Inc., 1994, pp. 115-208
  8. J. Chen, J. Zhang, B. Han, J. Li, X. Feng, Synthesis of cross-linked aggregates in CO2-expanded micellar solutions, Colloid Surf. B: Biointerface., 48 (2006) 72
  9. M.K. Ram, M. Adami, S. Paddeu, C. Nicolini, Nanoassembly of glucose oxidase on the in situ selfassembled films of polypyrrole and its optical, surface and electrochemical characterizations, Nanotechnology, 11 (2000)112
  10. Sigma Technical Bulletin, No.510, Sigma Chemical CO., St. Louis, 1983
  11. S. Shah, A. Sharma, M.N. Gupta, Preparation of crosslinked enzyme aggregates by using bovine serum albumin as a proteic feeder, Anal. Biochem., 351 (2006) 207
  12. R. Tyagi, R. Batra, M.N. Gupta, Amorphous enzyme aggregates: Stability towards heat and aqueousorganic co solvents mixtures, Enzym. Microb. Technol., 24 (1999) 348
  13. C. Roberge, D. Amos, D. Pollard, P. Devine, Preparation and application of cross-linked aggregates of chloroperoxidase with enhanced hydrogen peroxide tolerance, J. Molecul. Catal. B. Enzym., 56 (2009) 41
  14. P. Lopez-Serrano, L. Cao, F. van Rantwijk, R.A. Sheldon, Cross-linked enzyme aggregates with enhanced activity: application to lipases, Biotechnol. Lett., 24 (2002) 1379
  15. L. Zhao, L. Zheng, G. Gao, F. Jia, S. Cao, Resolution of N-(2-ethyl-6-methylphenyl) alanine via cross-linked aggregates of Pseudomonas sp. Lipase, J. Molecul. Catal. B.