Biosensing and electrochemical properties of flavin adenine dinucleotide (FAD)-Dependent glucose dehydrogenase (GDH) fused to a gold binding peptide

Hyeryeong Lee, Yoo Seok Lee, Stacy Simai Reginald, Seungwoo Baek, Eun Mi Lee, In Geol Choi, In Seop Chang

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24 Citations (Scopus)


In the present work, direct electron transfer (DET) based biosensing system for the determination of glucose has been fabricated by utilizing gold binding peptide (GBP) fused flavin adenine dinucleotide-dependent glucose dehydrogenase (FAD-GDH) from Burkholderia cepacia. The GBP fused FAD-GDH was immobilized on the working electrode surface of screen-printed electrode (SPE) which consists of gold working electrode, a silver pseudo-reference electrode and a platinum counter electrode, to develop the biosensing system with compact design and favorable sensing ability. The bioelectrochemical and mechanical properties of GBP fused FAD-GDH (GDH-GBP) immobilized SPE (GDH-GBP/Au) were investigated. Here, the binding affinity of GDH-GBP on Au surface, was highly increased after fusion of gold binding peptide and its uniform monolayer was formed on Au surface. In the cyclic voltammetry (CV), GDH-GBP/Au displayed significantly high oxidative peak currents corresponding to glucose oxidation which is almost c.a. 10-fold enhanced value compared with that from native GDH immobilized SPE (GDH/Au). As well, GDH-GBP/Au has shown 92.37% of current retention after successive potential scans. In the chronoamperometry, its steady-state catalytic current was monitored in various conditions. The dynamic range of GDH-GBP/Au was shown to be 3-30 mM at 30 °C and exhibits high selectivity toward glucose in whole human blood. Additionally, temperature dependency of GDH-GBP/Au on DET capability was also investigated at 30-70 °C. Considering this efficient and stable glucose sensing with simple and easy sensor fabrication, GDH-GBP based sensing platform can provide new insight for future biosensor in research fields that rely on DET.

Original languageEnglish
Article number112427
JournalBiosensors and Bioelectronics
Publication statusPublished - 2020 Oct 1

Bibliographical note

Funding Information:
H. Lee and Y. S. Lee contributed equally. This work was supported by grants from the National Research Foundation of Korea (NRF) , funded by the Korean Government ( 2020R1A2C3009210 ). The biospecimens and data used for this study were provided by National Biobank of Korea-Kyungpook National University Hospital(KNUH), a member of the KoreaBiobank Network-KNUH and all biospeciments were obtained (with informed consent) under institutional review board (IRB)-approved protocols.

Publisher Copyright:
© 2020 Elsevier B.V.


  • Biosensor
  • Direct electron transfer
  • Glucose dehydrogenase
  • Gold binding peptide
  • Screen-printed electrode

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry


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