Improvement of direct bioelectrocatalysis by cellobiose dehydrogenase on screen printed graphite electrodes using polyaniline modification

Trashin, Stanislav; Haltrich, Dietmar; Ludwig, Roland; Gorton, Lo; Karyakin, Arkady A.

doi:10.1016/j.bioelechem.2009.06.004

Cited by 22 publications

(10 citation statements)

References 30 publications

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“…Electropolymerization on the micro gaps of the cosmetic spray modified SPCE was achieved with a 0.100 mol dm −3 aniline solution in 0.500 mol dm −3 sulfuric acid (Trashin et al, 2009;Yin et al, 2006). Cyclic voltammetric scanning was performed in the range of -0.2 V to +0.8 V (vs. Ag/AgCl) at the scan rate of 100 mV s −1 in 50 cycles.…”

Section: Electrode Modificationmentioning

confidence: 99%

“…PANI is a polymer obtained from aniline (an oxidant and a strong mineral acid dopant) that has been successfully used in the construction of sensors (Huang et al, 2002;Sazou & Georgolios, 1997;Trashin et al, 2009;Yin et al, 2006); its applications are limited to acidic media (Grennan et al, 2006;Karyakin et al, 1996). According to previous reports, a more efficient way of attaining reproducible film properties is using electrochemical oxidation.…”

Section: Spray Modified and Aniline Polymerized Spcementioning

confidence: 99%

“…Electrochemical polymerization permits the control of the amount deposited, i.e. the thickness of the film, by the number of cycles, and the desired amount of charge (Grennan et al, 2006;Trashin et al, 2009;Waltman & Borgon, 1986).…”

Section: Spray Modified and Aniline Polymerized Spcementioning

confidence: 99%

“…Polymer films, and particularly those based on substituted aromatic compounds, such as aniline, present interesting characteristics, namely high conductivity, stability, durability, and reproducibility associated with low costs (Bhadra et al, 2009;Casella & Guascito, 1997;Gornall et al, 2009;Grennan et al, 2006;Huang et al, 2002Huang et al, , 2003Šeděnková et al, 2008;Shan et al, 2008;Trashin et al, 2009;Waltman & Bargon, 1986;Yin et al, 2006). Their main drawback is related to their preparation which involves handling of the respective monomers which are potentially hazardous materials.…”

Section: Introductionmentioning

confidence: 99%

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Development of polyaniline microarray electrodes for cadmium analysis

et al. 2012

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Disposable screen-printed electrodes (SPCE) were modified using a cosmetic product to partially block the electrode surface in order to obtain a microelectrode array. The microarrays formed were electropolymerized with aniline. Scanning electron microscopy was used to evaluate the modified and polymerized electrode surface. Electrochemical characteristics of the constructed sensor for cadmium analysis were evaluated by cyclic and square-wave voltammetry. Optimized stripping procedure in which the preconcentration of cadmium was achieved by depositing at -1.20 V (vs. Ag/AgCl) resulted in a well defined anodic peak at approximately -0.7 V at pH 4.6. The achieved limit of detection was 4 × 10 −9 mol dm −3. Spray modified and polymerized microarray electrodes were successfully applied to quantify cadmium in fish sample digests.

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Section: Electrode Modificationmentioning

confidence: 99%

Section: Spray Modified and Aniline Polymerized Spcementioning

confidence: 99%

Section: Spray Modified and Aniline Polymerized Spcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of polyaniline microarray electrodes for cadmium analysis

et al. 2012

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“…CDH was shown to have a potential in bioremediation [11]. However, the recent, practical interest to different CDHs [12][13][14][15][16][17][18][19][20][21][22][23][24] is focused on their application in bioelectrochemical devices, either in biosensors [12][13][14][15], or in the biofuel cells because of the ability of CDHs to shuttle electrons from the reduced isoalloxazine ring of FAD-domain via the heme b to the anode of an electrochemical cell by direct electron transfer (DET) [16][17][18][19][20][21][22][23].…”

mentioning

confidence: 99%

Cellobiose dehydrogenase of Chaetomium sp. INBI 2‐26(–): Structural basis of enhanced activity toward glucose at neutral pH

Vasil'chenko

Karapetyan

Yershevich

et al. 2011

Biotechnology Journal

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Cellobiose dehydrogenase (CDH) is an extracellular fungal flavocytochrome specifically oxidizing cellooligosaccharides and lactose to corresponding (-lactones by a variety of electron acceptors. In contrast to basidiomycetous CDHs, CDHs of ascomycetes also display certain activity toward glucose. The objective of this study was to establish the structural reasons of such an activity of CDH from mesophilic ascomycete Chaetomium sp. INBI 2-26 (ChCDH). The complete amino acid sequence of ChCDH displayed high levels of similarity with the amino acid sequences of CDHs from the thermophilic fungi Thielavia heterotallica and Myriococcum thermophilum. Peptide mass fingerprinting of purified ChCDH provided evidence for the oxidation of methionine residues in the FAD-domain. Comparative homology modeling of the structure of the ChCDH FAD-domain in complex with the transition state analog based on the structure of the same complex of basidiomycetous CDH (1NAA) as template indicated possible structural reasons for the enhanced activity of ascomycetous CDHs toward glucose at neutral pH, which is a prerequisite for application of CDH in a variety of biocompatible biosensors and biofuel cells.

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