Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO?
- Autores
- Heinecke, Julie L.; Khin, Chousu; Melo Pereira, Jose Clayston; Suarez, Sebastian; Iretskii, Alexei V.; Doctorovich, Fabio; Ford, Peter C.
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The water-soluble ferriheme model Fe(III)(TPPS) mediates oxygen atom transfer from inorganic nitrite to a water-soluble phosphine (tppts), dimethyl sulfide, and the biological thiols cysteine (CysSH) and glutathione (GSH). The products with the latter reductant are the respective sulfenic acids CysS(O)H and GS(O)H, although these reactive intermediates are rapidly trapped by reaction with excess thiol. The nitrosyl complex Fe(II)(TPPS)(NO) is the dominant iron species while excess substrate is present. However, in slightly acidic media (pH ≈ 6), the system does not terminate at this very stable ferrous nitrosyl. Instead, it displays a matrix of redox transformations linking spontaneous regeneration of Fe(III)(TPPS) to the formation of both N2O and NO. Electrochemical sensor and trapping experiments demonstrate that HNO (nitroxyl) is formed, at least when tppts is the reductant. HNO is the likely predecessor of the N2O. A key pathway to NO formation is nitrite reduction by Fe(II)(TPPS), and the kinetics of this iron-mediated transformation are described. Given that inorganic nitrite has protective roles during ischemia/reperfusion (I/R) injury to organs, attributed in part to NO formation, and that HNO may also reduce net damage from I/R, the present studies are relevant to potential mechanisms of such nitrite protection.
Fil: Heinecke, Julie L.. University Of California At Santa Barbara; Estados Unidos
Fil: Khin, Chousu. University Of California At Santa Barbara; Estados Unidos
Fil: Melo Pereira, Jose Clayston. University Of California At Santa Barbara; Estados Unidos
Fil: Suarez, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; Argentina
Fil: Iretskii, Alexei V.. Lake Superior State University; Estados Unidos. University Of California At Santa Barbara; Estados Unidos
Fil: Doctorovich, Fabio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; Argentina
Fil: Ford, Peter C.. University Of California At Santa Barbara; Estados Unidos - Materia
-
Nitrite
Heme
Nitroxyl
Iron - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/8079
Ver los metadatos del registro completo
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Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO?Heinecke, Julie L.Khin, ChousuMelo Pereira, Jose ClaystonSuarez, SebastianIretskii, Alexei V.Doctorovich, FabioFord, Peter C.NitriteHemeNitroxylIronhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The water-soluble ferriheme model Fe(III)(TPPS) mediates oxygen atom transfer from inorganic nitrite to a water-soluble phosphine (tppts), dimethyl sulfide, and the biological thiols cysteine (CysSH) and glutathione (GSH). The products with the latter reductant are the respective sulfenic acids CysS(O)H and GS(O)H, although these reactive intermediates are rapidly trapped by reaction with excess thiol. The nitrosyl complex Fe(II)(TPPS)(NO) is the dominant iron species while excess substrate is present. However, in slightly acidic media (pH ≈ 6), the system does not terminate at this very stable ferrous nitrosyl. Instead, it displays a matrix of redox transformations linking spontaneous regeneration of Fe(III)(TPPS) to the formation of both N2O and NO. Electrochemical sensor and trapping experiments demonstrate that HNO (nitroxyl) is formed, at least when tppts is the reductant. HNO is the likely predecessor of the N2O. A key pathway to NO formation is nitrite reduction by Fe(II)(TPPS), and the kinetics of this iron-mediated transformation are described. Given that inorganic nitrite has protective roles during ischemia/reperfusion (I/R) injury to organs, attributed in part to NO formation, and that HNO may also reduce net damage from I/R, the present studies are relevant to potential mechanisms of such nitrite protection.Fil: Heinecke, Julie L.. University Of California At Santa Barbara; Estados UnidosFil: Khin, Chousu. University Of California At Santa Barbara; Estados UnidosFil: Melo Pereira, Jose Clayston. University Of California At Santa Barbara; Estados UnidosFil: Suarez, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; ArgentinaFil: Iretskii, Alexei V.. Lake Superior State University; Estados Unidos. University Of California At Santa Barbara; Estados UnidosFil: Doctorovich, Fabio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; ArgentinaFil: Ford, Peter C.. University Of California At Santa Barbara; Estados UnidosAmerican Chemical Society2013-02-19info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/8079Heinecke, Julie L.; Khin, Chousu; Melo Pereira, Jose Clayston; Suarez, Sebastian; Iretskii, Alexei V.; et al.; Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO?; American Chemical Society; Journal Of The American Chemical Society; 135; 10; 19-2-2013; 4007-40170002-7863enginfo:eu-repo/semantics/altIdentifier/doi/dx.doi.org/10.1021/ja312092xinfo:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/ja312092xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:29:41Zoai:ri.conicet.gov.ar:11336/8079instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:29:41.295CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO? |
title |
Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO? |
spellingShingle |
Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO? Heinecke, Julie L. Nitrite Heme Nitroxyl Iron |
title_short |
Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO? |
title_full |
Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO? |
title_fullStr |
Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO? |
title_full_unstemmed |
Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO? |
title_sort |
Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO? |
dc.creator.none.fl_str_mv |
Heinecke, Julie L. Khin, Chousu Melo Pereira, Jose Clayston Suarez, Sebastian Iretskii, Alexei V. Doctorovich, Fabio Ford, Peter C. |
author |
Heinecke, Julie L. |
author_facet |
Heinecke, Julie L. Khin, Chousu Melo Pereira, Jose Clayston Suarez, Sebastian Iretskii, Alexei V. Doctorovich, Fabio Ford, Peter C. |
author_role |
author |
author2 |
Khin, Chousu Melo Pereira, Jose Clayston Suarez, Sebastian Iretskii, Alexei V. Doctorovich, Fabio Ford, Peter C. |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
Nitrite Heme Nitroxyl Iron |
topic |
Nitrite Heme Nitroxyl Iron |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The water-soluble ferriheme model Fe(III)(TPPS) mediates oxygen atom transfer from inorganic nitrite to a water-soluble phosphine (tppts), dimethyl sulfide, and the biological thiols cysteine (CysSH) and glutathione (GSH). The products with the latter reductant are the respective sulfenic acids CysS(O)H and GS(O)H, although these reactive intermediates are rapidly trapped by reaction with excess thiol. The nitrosyl complex Fe(II)(TPPS)(NO) is the dominant iron species while excess substrate is present. However, in slightly acidic media (pH ≈ 6), the system does not terminate at this very stable ferrous nitrosyl. Instead, it displays a matrix of redox transformations linking spontaneous regeneration of Fe(III)(TPPS) to the formation of both N2O and NO. Electrochemical sensor and trapping experiments demonstrate that HNO (nitroxyl) is formed, at least when tppts is the reductant. HNO is the likely predecessor of the N2O. A key pathway to NO formation is nitrite reduction by Fe(II)(TPPS), and the kinetics of this iron-mediated transformation are described. Given that inorganic nitrite has protective roles during ischemia/reperfusion (I/R) injury to organs, attributed in part to NO formation, and that HNO may also reduce net damage from I/R, the present studies are relevant to potential mechanisms of such nitrite protection. Fil: Heinecke, Julie L.. University Of California At Santa Barbara; Estados Unidos Fil: Khin, Chousu. University Of California At Santa Barbara; Estados Unidos Fil: Melo Pereira, Jose Clayston. University Of California At Santa Barbara; Estados Unidos Fil: Suarez, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; Argentina Fil: Iretskii, Alexei V.. Lake Superior State University; Estados Unidos. University Of California At Santa Barbara; Estados Unidos Fil: Doctorovich, Fabio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires; Argentina Fil: Ford, Peter C.. University Of California At Santa Barbara; Estados Unidos |
description |
The water-soluble ferriheme model Fe(III)(TPPS) mediates oxygen atom transfer from inorganic nitrite to a water-soluble phosphine (tppts), dimethyl sulfide, and the biological thiols cysteine (CysSH) and glutathione (GSH). The products with the latter reductant are the respective sulfenic acids CysS(O)H and GS(O)H, although these reactive intermediates are rapidly trapped by reaction with excess thiol. The nitrosyl complex Fe(II)(TPPS)(NO) is the dominant iron species while excess substrate is present. However, in slightly acidic media (pH ≈ 6), the system does not terminate at this very stable ferrous nitrosyl. Instead, it displays a matrix of redox transformations linking spontaneous regeneration of Fe(III)(TPPS) to the formation of both N2O and NO. Electrochemical sensor and trapping experiments demonstrate that HNO (nitroxyl) is formed, at least when tppts is the reductant. HNO is the likely predecessor of the N2O. A key pathway to NO formation is nitrite reduction by Fe(II)(TPPS), and the kinetics of this iron-mediated transformation are described. Given that inorganic nitrite has protective roles during ischemia/reperfusion (I/R) injury to organs, attributed in part to NO formation, and that HNO may also reduce net damage from I/R, the present studies are relevant to potential mechanisms of such nitrite protection. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-02-19 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/8079 Heinecke, Julie L.; Khin, Chousu; Melo Pereira, Jose Clayston; Suarez, Sebastian; Iretskii, Alexei V.; et al.; Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO?; American Chemical Society; Journal Of The American Chemical Society; 135; 10; 19-2-2013; 4007-4017 0002-7863 |
url |
http://hdl.handle.net/11336/8079 |
identifier_str_mv |
Heinecke, Julie L.; Khin, Chousu; Melo Pereira, Jose Clayston; Suarez, Sebastian; Iretskii, Alexei V.; et al.; Nitrite Reduction Mediated by Heme Models. Routes to NO and HNO?; American Chemical Society; Journal Of The American Chemical Society; 135; 10; 19-2-2013; 4007-4017 0002-7863 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/dx.doi.org/10.1021/ja312092x info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/ja312092x |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
American Chemical Society |
publisher.none.fl_str_mv |
American Chemical Society |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844614303918850048 |
score |
13.070432 |