scholarly journals Reversible temperature-dependent high- to low-spin transition in the heme Fe–Cu binuclear center of cytochrome ba3 oxidase

RSC Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 4776-4780 ◽  
Author(s):  
Antonis Nicolaides ◽  
Tewfik Soulimane ◽  
Constantinos Varotsis
Keyword(s):  
Raman Spectra ◽  
Spin Transition ◽  
Resonance Raman ◽  
Temperature Dependent ◽  
Cytochrome Ba3 ◽  
Binuclear Center ◽  
Resonance Raman Spectra

A reversible temperature-dependent high- to low-spin transition with T1/2 = −60 °C has been observed in the resonance Raman spectra of the equilibrium reduced and photoreduced heme a3 of the thermophilic ba3 heme–copper oxidoreductase.

scholarly journals Low-temperature resonance-Raman spectra of Japanese-lacquer-tree (Rhus vernicifera) laccase, type-2-copper-depleted laccase and H2O2-treated type-2-copper-depleted laccase

1983 ◽  
Vol 213 (2) ◽  
pp. 503-506 ◽  
Author(s):  
G Musci ◽  
A Desideri ◽  
L Morpurgo ◽  
A Garnier-Suillerot ◽  
L Tosi
Keyword(s):  
Raman Spectra ◽  
Strong Dependence ◽  
Resonance Raman ◽  
Local Symmetry ◽  
Structural Rearrangements ◽  
Blue Copper ◽  
Copper Site ◽  
Resonance Raman Spectra ◽  
Rhus Vernicifera

Resonance-Raman spectra of Japanese-lacquer-tree (Rhus vernicifera) laccase, type-2-copper-depleted laccase and the latter form treated with H2O2 were measured in liquid and frozen solution, on excitation into the 600 nm absorption band. Significant changes in intensity and/or frequency of the bands lying in the 370-430 cm-1 region were observed on freezing, indicating local structural rearrangements taking place at the blue copper site. These findings corroborate previous suggestions based on e.p.r. measurements and redox data [Morpurgo, Calabrese, Desideri & Rotilio (1981) Biochem. J. 193, 639-642]. They show the strong dependence of the physical properties of blue copper centres on local symmetry. Some conclusions on the origin of the Raman bands are also drawn.

Resonance Raman Spectra of β-Diketiminatocopper(II) Complexes

2010 ◽  
Vol 83 (10) ◽  
pp. 1162-1169
Author(s):  
Tomoko Miyazaki ◽  
Chizu Shimokawa ◽  
Toshio Matsushita ◽  
Shinobu Itoh ◽  
Junji Teraoka
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Resonance Raman Spectra
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