Electrochemical investigation on the catalytic ability of tyrosinase with the effect of nano titanium dioxide

Zhou, Hui; Liu, Lei; Yin, Kun; Liu, Shanli; Li, Genxi

doi:10.1016/j.elecom.2006.05.016

Cited by 36 publications

(18 citation statements)

References 17 publications

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“…As seen in Figure 1D, FT‐IR spectrum of BSA (red line) was recorded with the adsorption band at 1650 cm −1 (amide I) attributed to the carbonyl groups (C=O) stretching vibration of peptide bond in protein skeleton and 1540 cm −1 (amide II) due to the combination of N‐H bending vibration and C‐N stretching vibration. The two adsorption bands are directly related to the secondary structure of BSA as well as the previous report 25 . The characteristic bands of TiO 2 were measured at 480–880 cm −1 (black line).…”

Section: Resultssupporting

confidence: 76%

“…The two adsorption bands are directly related to the secondary structure of BSA as well as the previous report. 25 The characteristic bands of TiO 2 were measured at 480-880 cm À1 (black line). Other adsorption bands of TiO 2 at 1620 and 3400 cm À1 are related to hydroxyl groups (-OH) on the TiO 2 surface due to the bending vibration of water or some residual substances (such as propanol and nitric acid) during the synthetic process.…”

Section: Structural Characterization Of Bsa/tiomentioning

confidence: 99%

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Bovine serum albumin‐coated titanium dioxide modified electrochemical interface for enantioselective discrimination of D/L‐aspartic acid

Wei

Chen

et al. 2021

Chirality

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Due to the similar physicochemical properties, the discrimination of chiral isomers faces huge challenges in drug production and biochemical analysis.Herein, the bovine serum albumin-coated titanium dioxide (bovine serum albumin [BSA]/TiO 2 ) was modified as a novel electrochemical interface for efficient, simple, and enantioselective discrimination of aspartic acid enantiomers (D/L-Asp) based on the electrochemical impedance spectroscopy (EIS). Utilizing the structural characteristics of large cavity and high specific surface area, TiO 2 material provided sufficient space for adequate loading of BSA. The BSA/TiO 2 electrochemical interface was successfully fabricated to support abundant chiral recognition sites. The enantioselective discrimination of D/L-Asp was achieved on the interface with a good linear relationship against the impedance difference in the concentration range from 1 to 1000 nM with the detection limit of 0.37 nM for L-Asp and 0.94 nM for D-Asp, reaching the identification coefficient (I c = K L /K D ) of 1.85. The proposed interface is easy to form with a stable formation of BSA in TiO 2 microporous architecture, which maintained the desired stability and reproducibility. For the unknown racemic solution, I c levels of different enantio-ratios of D/L-Asp were effectively obtained to evaluate the chiral percentage of racemic sample. The possible mechanism of chiral recognition by density function theory (DFT) was confirmed with a stronger adsorption to L-Asp in accordance with our experiment results, reinforcing the validity of our presented interface. The BSA/TiO 2 electrochemical interface with robust enantioselective discrimination of D/L-Asp has great potential for the practical application in pharmaceutical surveillance and food security.

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Section: Resultssupporting

confidence: 76%

Section: Structural Characterization Of Bsa/tiomentioning

confidence: 99%

Bovine serum albumin‐coated titanium dioxide modified electrochemical interface for enantioselective discrimination of D/L‐aspartic acid

Wei

Chen

et al. 2021

Chirality

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show abstract

“…These three forms could turn to each other, whereas E oxy is the highly active form and could catalyze the oxidation of the monophenol substrate [119]. Due to the irradiation of UV on this nanomaterial, reactive oxygen species (ROS) could be produced, thus the turnover of tyrosinase from E met to E oxy is achieved [120].…”

Section: Activity Regulation Of Redox Proteinsmentioning

confidence: 99%

Electron transfer and interfacial behavior of redox proteins

Zhou

Cao

2010

Sci. China Chem.

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This paper reviews the recent progress in the electron transfer and interfacial behavior of redox proteins. Significant achievements in the relevant fields are summarized including the direct electron transfer between proteins and electrodes, the thermodynamic and kinetic properties, catalytic activities and activity regulation of the redox proteins. It has been demonstrated that the electrochemical technique is an effective tool for protein studies, especially for probing into the electron transfer and interfacial behavior of redox proteins. electron transfer, interfacial behavior, redox protein, protein electrochemistry, electroanalysis

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“…One solution is to fabricate a more effective anode demonstrating high conductivity, high specific surface area, high porosity, noncorrosiveness, and low cost. With these requirements in mind, titanium dioxide (TiO 2 ) has been chosen as a component, codoped with polyaniline in anode materials [11][12][13][14][15][16][17][18] due to its biocompatible, stable, catalytic, 19 and nontoxic properties. As Qiao et al 15 reported, the nanostructured composite anode of TiO 2 with 30 wt% polyaniline delivers much higher power density (1495 mW m À2 ) in Escherichia coli (E. coli) MFCs.…”

Section: Introductionmentioning

confidence: 99%

Selective adsorption ofl-serine functional groups on the anatase TiO₂(101) surface in benthic microbial fuel cells

Zhao

Wang

Zhai

et al. 2014

Phys. Chem. Chem. Phys.

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To help design bacteria-friendly anodes for unmediated benthic microbial fuel cells (MFCs), we explore the role of anatase TiO2(101) surface biocompatibility in selecting the functional groups of the levo-isomer serine (L-Ser), which contains carboxyl, hydroxyl, and amino groups in a single molecule. By performing total energy calculations and molecular dynamics simulations based on a density-functional tight-binding method, we find that at room temperature, the surface should be active for biomolecules with carboxyl/carboxylic and hydroxyl groups, but it is not sensitive to those with amino groups. The hydrogen bonding between the hydroxyl H and surface O facilitates electron transfer from the pili or the bacterial matrix to the anode surface, which improves the output power density. Thus, in combination with conductive polymers, the anatase TiO2(101) surface can be an effective biocompatible substrate in benthic MFCs by enabling the surface O to form more hydrogen bonds with the hydroxyl H of the biomolecule.

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Electrochemical investigation on the catalytic ability of tyrosinase with the effect of nano titanium dioxide

Cited by 36 publications

References 17 publications

Bovine serum albumin‐coated titanium dioxide modified electrochemical interface for enantioselective discrimination of D/L‐aspartic acid

Bovine serum albumin‐coated titanium dioxide modified electrochemical interface for enantioselective discrimination of D/L‐aspartic acid

Electron transfer and interfacial behavior of redox proteins

Selective adsorption ofl-serine functional groups on the anatase TiO₂(101) surface in benthic microbial fuel cells

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Electrochemical investigation on the catalytic ability of tyrosinase with the effect of nano titanium dioxide

Cited by 36 publications

References 17 publications

Bovine serum albumin‐coated titanium dioxide modified electrochemical interface for enantioselective discrimination of D/L‐aspartic acid

Bovine serum albumin‐coated titanium dioxide modified electrochemical interface for enantioselective discrimination of D/L‐aspartic acid

Electron transfer and interfacial behavior of redox proteins

Selective adsorption ofl-serine functional groups on the anatase TiO2(101) surface in benthic microbial fuel cells

Contact Info

Product

Resources

About

Selective adsorption ofl-serine functional groups on the anatase TiO₂(101) surface in benthic microbial fuel cells