Formation of protein S-nitrosylation by reactive oxygen species.
Free Radic Res
; 48(9): 996-1010, 2014 Sep.
Article
em En
| MEDLINE
| ID: mdl-25005256
ABSTRACT
In the present study, the formation of whole cellular S-nitrosylated proteins (protein-SNOs) by the reactive oxygen species (ROS), hydrogen peroxide (H2O2), and superoxide (O2(â¢-)) is demonstrated. A spectrum of protein cysteine oxidative modifications was detected upon incubation of serum-starved mouse embryonic fibroblasts with increasing concentrations of exogenous H2O2, ranging from exclusive protein-SNOs at low concentrations to a mixture of protein-SNOs and other protein oxidation at higher concentrations to exclusively non-SNO protein oxidation at the highest concentrations of the oxidant used. Furthermore, formation of protein-SNOs was also detected upon inhibition of the antioxidant protein Cu/Zn superoxide dismutase that results in an increase in intracellular concentration of O2(â¢-). These results were further validated using the phosphatase and tensin homologue, PTEN, as a model of a protein sensitive to oxidative modifications. The formation of protein-SNOs by H2O2 and O2(â¢-) was prevented by the NO scavenger, c-PTIO, as well as the peroxinitrite decomposition catalyst, FETPPS, and correlated with the production or the consumption of nitric oxide (NO), respectively. These data suggest that the formation of protein-SNOs by H2O2 or O2(â¢-) requires the presence or the production of NO and involves the formation of the nitrosylating intermediate, peroxinitrite.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oxirredução
/
Proteínas
/
Espécies Reativas de Oxigênio
Limite:
Animals
Idioma:
En
Revista:
Free Radic Res
Assunto da revista:
BIOQUIMICA
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Singapura