An EPR signal from the “invisible” copper of cytochrome oxidase

Seiter, C. H. A.; Angelos, S.G.; Perreault, R.A.

doi:10.1016/0006-291x(77)90244-3

Cited by 9 publications

(1 citation statement)

References 19 publications

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“…At least three metal site environments are apparent in the Q-band spectrum of vanadyl(IV)-labeled human serotransferrin and a conformational change at pH 10 can be detected (66). EPR analysis of "invisible" copper in cytochrome oxidase has been described (67). A model for the concentration changes of ceruloplasmin and Fe transferrin (II) after myocardial infarction has been discussed and confirmed using ESR data (68).…”

Section: Selected Paramagnetic Materialsmentioning

confidence: 95%

Electron spin resonance

Wasson¹,

Salinas²

1980

Anal. Chem.

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Wilson, C. A.; Ferrero, E. P.; Coleman, H. J. U.S. Energy Res. Dev. Adm.. Rep., No. BERC/RI-77/8, 1977. (398) Ure, A. M.; Hernandez-Artiga, M. P.; Mitchell, M. C. Hyvonen. M.; Tarvainen. M. J . Radioanal. Chem. 1978, (405) Cesapa, A.; Nava, A.; Teatini, A.; Tenconi, T.; Terrani, M.; Terrani, S. (406) Buono, J. A,; Buono, J. C.; Fasching, J. L. (414) Versieck, J.; Hoste, J.; Barbier, F.; Steyaert, H.; De Rudder, J.; Michels, (415) Lyengar, G. V.; Kasperek, K.; Feinendegen, L. E. Phys. M e d . Bid. 1978, (416) Kirzhner, M. A.; Kryzhenkova, N. A.; Kist, A. A. M e d .

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Section: Selected Paramagnetic Materialsmentioning

confidence: 95%

Electron spin resonance

Wasson¹,

Salinas²

1980

Anal. Chem.

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Metal-metal interactions in metalloporphyrins, metalloproteins and metalloenzymes

Cohen

Structure and Bonding

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Recent years have seen the identification of multimetal active sites in a considerable number of proteins and enzymes In some of these, the metal ions interact with each other through a ligand bridge with substantial modification of their properties They act in concert, often binding or reducing dioxygen in a multi-electron process Although the mechanistic implications of the metal-metal interactions are most important, the evidence for the interactions usually come from magnetic and spectroscopic studies. Five systems have been selected in order to review the methodology and results found in this ares. The oxo and nitrido bridged hemin dimers are very well binuclear bridged iron and copper active sites and show strong antiferromagnetic properties. Laccase and eytochrome oxidase are multi-copper and iron containing enzymes which reduce dioxygen and are much studied but less understood than the others.

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