Oxygen Reduction and Proton Translocation by the Heme-Copper Oxidases

1999 ◽  
pp. 193-217 ◽  
Author(s):  
Mårten Wikström ◽  
Joel E. Morgan ◽  
Gerhard Hummer ◽  
William H. Woodruff ◽  
Michael I. Verkhovsky
Keyword(s):  
Oxygen Reduction ◽  
Proton Translocation ◽  
Heme Copper Oxidases

The histidine cycle: A new model for proton translocation in the respiratory heme-copper oxidases

1994 ◽  
Vol 26 (6) ◽  
pp. 599-608 ◽  
Author(s):  
Joel E. Morgan ◽  
Michael I. Verkhovsky ◽  
M�rten Wikstr�m
Keyword(s):  
Proton Translocation ◽  
New Model ◽  
Heme Copper Oxidases

scholarly journals Mechanism and energetics of proton translocation by the respiratory heme-copper oxidases

2007 ◽  
Vol 1767 (10) ◽  
pp. 1200-1214 ◽  
Author(s):  
Mårten Wikström ◽  
Michael I. Verkhovsky
Keyword(s):  
Proton Translocation ◽  
Heme Copper Oxidases

Towards an Understanding of the Chemistry of Oxygen Reduction

1995 ◽  
Vol 22 (3) ◽  
pp. 479 ◽  
Author(s):  
PR Rich
Keyword(s):  
Oxygen Reduction ◽  
Proton Translocation ◽  
Essential Elements ◽  
Catalytic Cycle ◽  
Terminal Oxidases ◽  
Working Model ◽  
Catalytic Intermediates

Advances in understanding of the structure and the catalytic cycle of oxygen reduction of the protonmotive haem-copper terminal oxidases are reviewed. This information has been combined with our recent recognition of the need for electroneutrality of stable catalytic intermediates to produce a new working model of the essential elements of the chemiosmotic mechanism of coupling of oxygen reduction chemistry to vectorial proton translocation.

Proton translocation by bacteriorhodopsin and heme-copper oxidases

1998 ◽  
Vol 8 (4) ◽  
pp. 480-488 ◽  
Author(s):  
Mårten Wikström
Keyword(s):  
Proton Translocation ◽  
Heme Copper Oxidases

scholarly journals Bridging Oxidase- and Oxygen Reduction Electro-Catalysis by Model Single-Atom Catalysts

2021 ◽  
Author(s):  
Xiangyu Lu ◽  
Shanshan Gao ◽  
Han Lin ◽  
Han Tian ◽  
Deliang Xu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Density Functional ◽  
Reduction Reaction ◽  
Single Atom ◽  
Catalytic Activities ◽  
Activity Assessment ◽  
Environmental Treatment ◽  
Activity Measurements ◽  
Electro Catalysis ◽  
Heme Copper Oxidases

Nanocatalysts with enzyme-like catalytic activities, such as oxidase-mimics, are extensively used in biomedicine and environmental treatment. Searching enzyme-like nanomaterials, clarifying the origins of catalytic activity and developing <a></a><a>activity assessment</a> methodologies are therefore of great significance. Here we report that the oxidase- and oxygen reduction reaction (ORR) electro-catalysis can be well-bridged based on their identical activity origins, which makes the facile electrocatalytic ORR activity measurements intrinsically applicable to the oxidase-like activity evaluations. Inspired by natural heme-copper oxidases, Cu/Fe doped <a>single-atom </a><a>catalysts</a> (SACs) were first synthesized and used as model <a>catalysts</a>. Chromogenic reactions, electrochemical voltammetric measurements and <a></a><a>density functional theory</a> calculations further verify <a>the </a>linear relationship between their oxidase-like and ORR catalytic activities of the catalysts, thus an effective descriptor () are proposed for the rapid enzymic catalyst evaluation. <a>The enhanced tumour therapeutic efficacy</a> of SACs has been evidenced to result from their oxidase-like/ORR activities, which prove that numerous ORR electrocatalysts are promising candidates for oxidase mimics and tumour therapy. The synergistic catalytic effect of the biomimetic hetero-binuclear Cu-Fe centres has also been probed thoroughly.

scholarly journals Bridging Oxidase- and Oxygen Reduction Electro-Catalysis by Model Single-Atom Catalysts

2021 ◽  
Author(s):  
Xiangyu Lu ◽  
Shanshan Gao ◽  
Han Lin ◽  
Han Tian ◽  
Deliang Xu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Density Functional ◽  
Reduction Reaction ◽  
Single Atom ◽  
Catalytic Activities ◽  
Activity Assessment ◽  
Environmental Treatment ◽  
Activity Measurements ◽  
Electro Catalysis ◽  
Heme Copper Oxidases

Nanocatalysts with enzyme-like catalytic activities, such as oxidase-mimics, are extensively used in biomedicine and environmental treatment. Searching enzyme-like nanomaterials, clarifying the origins of catalytic activity and developing <a></a><a>activity assessment</a> methodologies are therefore of great significance. Here we report that the oxidase- and oxygen reduction reaction (ORR) electro-catalysis can be well-bridged based on their identical activity origins, which makes the facile electrocatalytic ORR activity measurements intrinsically applicable to the oxidase-like activity evaluations. Inspired by natural heme-copper oxidases, Cu/Fe doped <a>single-atom </a><a>catalysts</a> (SACs) were first synthesized and used as model <a>catalysts</a>. Chromogenic reactions, electrochemical voltammetric measurements and <a></a><a>density functional theory</a> calculations further verify <a>the </a>linear relationship between their oxidase-like and ORR catalytic activities of the catalysts, thus an effective descriptor () are proposed for the rapid enzymic catalyst evaluation. <a>The enhanced tumour therapeutic efficacy</a> of SACs has been evidenced to result from their oxidase-like/ORR activities, which prove that numerous ORR electrocatalysts are promising candidates for oxidase mimics and tumour therapy. The synergistic catalytic effect of the biomimetic hetero-binuclear Cu-Fe centres has also been probed thoroughly.

pH Dependence of Proton Translocation in the Oxidative and Reductive Phases of the Catalytic Cycle of CytochromecOxidase. The Role of H2O Produced at the Oxygen-Reduction Site†

Biochemistry ◽  
2006 ◽  
Vol 45 (6) ◽  
pp. 1930-1937 ◽  
Author(s):  
Giuseppe Capitanio ◽  
Pietro Luca Martino ◽  
Nazzareno Capitanio ◽  
Emanuele De Nitto ◽  
Sergio Papa
Keyword(s):  
Oxygen Reduction ◽  
Ph Dependence ◽  
Proton Translocation ◽  
Catalytic Cycle

Rational prediction of multifunctional bilayer single atom catalysts for the hydrogen evolution, oxygen evolution and oxygen reduction reactions

Nanoscale ◽  
2020 ◽  
Vol 12 (39) ◽  
pp. 20413-20424
Author(s):  
Riming Hu ◽  
Yongcheng Li ◽  
Fuhe Wang ◽  
Jiaxiang Shang
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Single Atom ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions

Bilayer single atom catalysts can serve as promising multifunctional electrocatalysts for the HER, ORR, and OER.

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