scholarly journals Redox potentials of the blue copper sites of bilirubin oxidases

2006 ◽  
Vol 1757 (12) ◽  
pp. 1634-1641 ◽  
Author(s):  
Andreas Christenson ◽  
Sergey Shleev ◽  
Nicolas Mano ◽  
Adam Heller ◽  
Lo Gorton
Keyword(s):  
Redox Potentials ◽  
Blue Copper ◽  
Copper Sites ◽  
Bilirubin Oxidases

Electronic structure of the oxidized and reduced blue copper sites: contributions to the electron transfer pathway, reduction potential, and geometry

1996 ◽  
Vol 243 (1-2) ◽  
pp. 67-78 ◽  
Author(s):  
Edward I. Solomon ◽  
Kevin W. Penfield ◽  
Andrew A. Gewirth ◽  
Michael D. Lowery ◽  
Susan E. Shadle ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electronic Structure ◽  
Reduction Potential ◽  
Blue Copper ◽  
Electron Transfer Pathway ◽  
Copper Sites

Metal-ligand interactions in perturbed blue copper sites: a paramagnetic 1H NMR study of Co(II)-pseudoazurin

2003 ◽  
Vol 8 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Claudio O. Fernández ◽  
Tomotake Niizeki ◽  
Takamitsu Kohzuma ◽  
Alejandro J. Vila
Keyword(s):  
1H Nmr ◽  
Blue Copper ◽  
Nmr Study ◽  
Ligand Interactions ◽  
Copper Sites ◽  
Metal Ligand

scholarly journals Electrochemical redox transformations of T1 and T2 copper sites in native Trametes hirsuta laccase at gold electrode

2005 ◽  
Vol 385 (3) ◽  
pp. 745-754 ◽  
Author(s):  
Sergey SHLEEV ◽  
Andreas CHRISTENSON ◽  
Vladimir SEREZHENKOV ◽  
Dosymzhan BURBAEV ◽  
Alexander YAROPOLOV ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Gold Electrode ◽  
Direct Electron Transfer ◽  
High Potential ◽  
Redox Potentials ◽  
Hydrogen Electrode ◽  
Trametes Hirsuta ◽  
Redox Transformations ◽  
Copper Site ◽  
Copper Sites

Mediatorless, electrochemically driven, redox transformations of T1 (type 1) and T2 copper sites in Trametes hirsuta laccase were studied by cyclic voltammetry and spectroelectrochemical redox titrations using bare gold electrode. DET (direct electron transfer) between the electrode and the enzyme was observed under anaerobic conditions. From analysis of experimental data it is concluded that the T2 copper site is in DET contact with gold. It was found that electron transfer between the gold surface and the T1 copper site progresses through the T2 copper site. From EPR measurements and electrochemical data it is proposed that the redox potential of the T2 site for high-potential ‘blue’ laccase is equal to about 400 mV versus NHE (normal hydrogen electrode) at pH 6.5. The hypothesis that the redox potentials of the T2 copper sites in low- and high-potential laccases/oxidases from totally different sources might be very similar, i.e. approx. 400 mV, is discussed.

Molecular redesign of blue copper sites

1992 ◽  
Vol 47 (3-4) ◽  
pp. 26
Author(s):  
Joann Sanders-Loehr
Keyword(s):  
Blue Copper ◽  
Copper Sites
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