Mechanistic Study of Direct Electron Transfer in Bilirubin Oxidase

2012 ◽  
Keyword(s):  
Electron Transfer ◽  
Direct Electron Transfer ◽  
Mechanistic Study ◽  
Bilirubin Oxidase

Mechanistic study of direct electron transfer in bilirubin oxidase

2012 ◽  
Vol 61 ◽  
pp. 44-49 ◽  
Author(s):  
Shayna Brocato ◽  
Carolin Lau ◽  
Plamen Atanassov
Keyword(s):  
Electron Transfer ◽  
Direct Electron Transfer ◽  
Mechanistic Study ◽  
Bilirubin Oxidase

Improved direct electron transfer-type bioelectrocatalysis of bilirubin oxidase using porous gold electrodes

2019 ◽  
Vol 843 ◽  
pp. 47-53 ◽  
Author(s):  
Yui Takahashi ◽  
Mizue Wanibuchi ◽  
Yuki Kitazumi ◽  
Osamu Shirai ◽  
Kenji Kano
Keyword(s):  
Electron Transfer ◽  
Direct Electron Transfer ◽  
Gold Electrodes ◽  
Bilirubin Oxidase ◽  
Porous Gold

Mechanistic Study of ROS-photogeneration by Pterin

Pteridines ◽  
2011 ◽  
Vol 22 (1) ◽  
pp. 73-76 ◽  
Author(s):  
Hong-Fang Ji ◽  
Liang Shen
Keyword(s):  
Electron Transfer ◽  
Density Functional ◽  
Transfer Reaction ◽  
Direct Electron Transfer ◽  
Density Functional Theory Calculations ◽  
Electron Transfer Reaction ◽  
Mechanistic Study ◽  
Functional Theory ◽  
Direct Energy ◽  
Electronic Parameters

Abstract Pterins are widespread in biological systems and possess photosensitizing activities. In the present study, the photosensitization mechanism of acid form of pterin (PTA) and basic form of pterin (PTB) is investigated by means of density functional theory calculations. The reactive oxygen species-photogenerating pathways of the lowest triplet excited (T1) state PTA and PTB are proposed as follows. Through direct energy transfer, both T1 state PTA and PTB can photogenerate 1O2. Two possible O2 .−-generating pathways are proposed according to the electronic parameters of PTA and PTB: i) direct electron transfer from T1 state PTA and PTB to 3O2 and the electron transfer reaction is more favorable energetically for PTB in comparison with PTA; and ii) electron transfer from anion radical of PTA and PTB to 3O2.

The conjugated oligoelectrolyte DSSN+ enables exceptional coulombic efficiency via direct electron transfer for anode-respiring Shewanella oneidensis MR-1—a mechanistic study

2014 ◽  
Vol 16 (38) ◽  
pp. 20436-20443 ◽  
Author(s):  
Nathan D. Kirchhofer ◽  
Xiaofen Chen ◽  
Enrico Marsili ◽  
James J. Sumner ◽  
Frederick W. Dahlquist ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Coulombic Efficiency ◽  
Direct Electron Transfer ◽  
Shewanella Oneidensis ◽  
Mechanistic Study ◽  
Electron Transfer Pathway

Biofilm electrochemistry reveals that DSSN+ increases coulombic efficiency by enhancing the native direct electron transfer pathway of S. oneidensis MR-1.

scholarly journals Impact of Surface Modification with Gold Nanoparticles on the Bioelectrocatalytic Parameters of Immobilized Bilirubin Oxidase

Acta Naturae ◽  
2014 ◽  
Vol 6 (1) ◽  
pp. 102-106 ◽  
Author(s):  
D. V. Pankratov ◽  
Y. S. Zeifman ◽  
А. V. Dudareva ◽  
G. K. Pankratova ◽  
M. E. Khlupova ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Electron Transfer ◽  
Transfer Rate ◽  
Direct Electron Transfer ◽  
Electron Transfer Rate ◽  
Bilirubin Oxidase ◽  
Heterogeneous Electron Transfer ◽  
Enzyme Molecules ◽  
Different Diameters ◽  
The Impact

We unveil experimental evidence that put into question the widely held notion concerning the impact of nanoparticles on the bioelectrocatalytic parameters of enzymatic electrodes. Comparative studies of the bioelectrocatalytic properties of fungal bilirubin oxidase from Myrothecium verrucaria adsorbed on gold electrodes, modified with gold nanoparticles of different diameters, clearly indicate that neither the direct electron transfer rate (standard heterogeneous electron transfer rate constants were calculated to be 319 s -1) nor the biocatalytic activity of the adsorbed enzyme (bioelectrocatalytic constants were calculated to be 3411 s -1) depends on the size of the nanoparticles, which had diameters close to or larger than those of the enzyme molecules.

scholarly journals Significance of Nano-Structures of Carbon Materials for Direct-Electron-Transfer-type Bioelectrocatalysis of Bilirubin Oxidase

2020 ◽  
Vol 88 (5) ◽  
pp. 374-379 ◽  
Author(s):  
Mizue WANIBUCHI ◽  
Yui TAKAHASHI ◽  
Yuki KITAZUMI ◽  
Osamu SHIRAI ◽  
Kenji KANO
Keyword(s):  
Electron Transfer ◽  
Carbon Materials ◽  
Direct Electron Transfer ◽  
Bilirubin Oxidase ◽  
Nano Structures

Effects of axial ligand mutation of the type I copper site in bilirubin oxidase on direct electron transfer-type bioelectrocatalytic reduction of dioxygen

2007 ◽  
Vol 601 (1-2) ◽  
pp. 119-124 ◽  
Author(s):  
Yuji Kamitaka ◽  
Seiya Tsujimura ◽  
Kunishige Kataoka ◽  
Takeshi Sakurai ◽  
Tokuji Ikeda ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Direct Electron Transfer ◽  
Axial Ligand ◽  
Type I ◽  
Bilirubin Oxidase ◽  
Copper Site
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