O2 reduction by a functional heme/nonheme bis-iron NOR model complex.
Proc Natl Acad Sci U S A
; 106(26): 10528-33, 2009 Jun 30.
Article
em En
| MEDLINE
| ID: mdl-19541624
ABSTRACT
O(2) reactivity of a functional NOR model is investigated by using electrochemistry and spectroscopy. The electrochemical measurements using interdigitated electrodes show very high selectivity for 4e O(2) reduction with minimal production of partially reduced oxygen species (PROS) under both fast and slow electron flux. Intermediates trapped at cryogenic temperatures and characterized by using resonance Raman spectroscopy under single-turnover conditions indicate that an initial bridging peroxide intermediate undergoes homolytic O--O bond cleavage generating a trans heme/nonheme bis-ferryl intermediate. This bis ferryl species can oxygenate 2 equivalents of a reactive substrate.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Oxirredutases
/
Oxigênio
/
Heme
/
Ferro
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article