Mechanism of Sulfide Binding by Ferric Hemeproteins
- Autores
- Boubeta, Fernando Martín; Bieza, Silvina Andrea; Bringas, Mauro; Estrin, Dario Ariel; Boechi, Leonardo; Bari, Sara Elizabeth
- Año de publicación
- 2018
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The reaction of hydrogen sulfide (H2S) with hemeproteins is a key physiological reaction; still, its mechanism and implications are not completely understood. In this work, we propose a combination of experimental and theoretical tools to shed light on the reaction in model system microperoxidase 11 (MP11-FeIII) and myoglobin (Mb-FeIII), from the estimation of the intrinsic binding constants of the species H2S and hydrosulfide (HS-), and the computational description of the overall binding process. Our results show that H2S and HS- are the main reactive species in Mb-FeIII and MP11-FeIII, respectively, and that the magnitude of their intrinsic binding constants are similar to most of the binding constants reported so far for hemeproteins systems and model compounds. However, while the binding of HS- to Mb-FeIII was negligible, the binding of H2S to MP11-FeIII was significant, providing a frame for a discriminated analysis of both species and revealing differential mechanistic aspects. A joint inspection of the kinetic data and the free energy profiles of the binding processes suggests that a dissociative mechanism with the release of a coordinated water molecule as rate limiting step is operative in the binding of H2S to Mb-FeIII and that the binding of HS- is prevented in the access to the protein matrix. For the MP11-FeIII case, where no access restrictions for the ligands are present, an associative component in the mechanism seems to be operative. Overall, the results suggest that if accessing the active site then both H2S and HS- are capable of binding a ferric heme moiety.
Fil: Boubeta, Fernando Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Bieza, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Bringas, Mauro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
Fil: Estrin, Dario Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Boechi, Leonardo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Cálculo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bari, Sara Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina - Materia
-
HEMEPROTEINS
SULFIDE BINDING
KINETIC MEASUREMENTS
STEERED MOLECULAR DYNAMICS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/89310
Ver los metadatos del registro completo
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Mechanism of Sulfide Binding by Ferric HemeproteinsBoubeta, Fernando MartínBieza, Silvina AndreaBringas, MauroEstrin, Dario ArielBoechi, LeonardoBari, Sara ElizabethHEMEPROTEINSSULFIDE BINDINGKINETIC MEASUREMENTSSTEERED MOLECULAR DYNAMICShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The reaction of hydrogen sulfide (H2S) with hemeproteins is a key physiological reaction; still, its mechanism and implications are not completely understood. In this work, we propose a combination of experimental and theoretical tools to shed light on the reaction in model system microperoxidase 11 (MP11-FeIII) and myoglobin (Mb-FeIII), from the estimation of the intrinsic binding constants of the species H2S and hydrosulfide (HS-), and the computational description of the overall binding process. Our results show that H2S and HS- are the main reactive species in Mb-FeIII and MP11-FeIII, respectively, and that the magnitude of their intrinsic binding constants are similar to most of the binding constants reported so far for hemeproteins systems and model compounds. However, while the binding of HS- to Mb-FeIII was negligible, the binding of H2S to MP11-FeIII was significant, providing a frame for a discriminated analysis of both species and revealing differential mechanistic aspects. A joint inspection of the kinetic data and the free energy profiles of the binding processes suggests that a dissociative mechanism with the release of a coordinated water molecule as rate limiting step is operative in the binding of H2S to Mb-FeIII and that the binding of HS- is prevented in the access to the protein matrix. For the MP11-FeIII case, where no access restrictions for the ligands are present, an associative component in the mechanism seems to be operative. Overall, the results suggest that if accessing the active site then both H2S and HS- are capable of binding a ferric heme moiety.Fil: Boubeta, Fernando Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Bieza, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Bringas, Mauro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; ArgentinaFil: Estrin, Dario Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Boechi, Leonardo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Cálculo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bari, Sara Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaAmerican Chemical Society2018-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/89310Boubeta, Fernando Martín; Bieza, Silvina Andrea; Bringas, Mauro; Estrin, Dario Ariel; Boechi, Leonardo; et al.; Mechanism of Sulfide Binding by Ferric Hemeproteins; American Chemical Society; Inorganic Chemistry; 57; 13; 7-2018; 7591-76000020-1669CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/10.1021/acs.inorgchem.8b00478info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.inorgchem.8b00478info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:11:46Zoai:ri.conicet.gov.ar:11336/89310instacron: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:34982025-10-22 11:11:46.462CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Mechanism of Sulfide Binding by Ferric Hemeproteins |
| title |
Mechanism of Sulfide Binding by Ferric Hemeproteins |
| spellingShingle |
Mechanism of Sulfide Binding by Ferric Hemeproteins Boubeta, Fernando Martín HEMEPROTEINS SULFIDE BINDING KINETIC MEASUREMENTS STEERED MOLECULAR DYNAMICS |
| title_short |
Mechanism of Sulfide Binding by Ferric Hemeproteins |
| title_full |
Mechanism of Sulfide Binding by Ferric Hemeproteins |
| title_fullStr |
Mechanism of Sulfide Binding by Ferric Hemeproteins |
| title_full_unstemmed |
Mechanism of Sulfide Binding by Ferric Hemeproteins |
| title_sort |
Mechanism of Sulfide Binding by Ferric Hemeproteins |
| dc.creator.none.fl_str_mv |
Boubeta, Fernando Martín Bieza, Silvina Andrea Bringas, Mauro Estrin, Dario Ariel Boechi, Leonardo Bari, Sara Elizabeth |
| author |
Boubeta, Fernando Martín |
| author_facet |
Boubeta, Fernando Martín Bieza, Silvina Andrea Bringas, Mauro Estrin, Dario Ariel Boechi, Leonardo Bari, Sara Elizabeth |
| author_role |
author |
| author2 |
Bieza, Silvina Andrea Bringas, Mauro Estrin, Dario Ariel Boechi, Leonardo Bari, Sara Elizabeth |
| author2_role |
author author author author author |
| dc.subject.none.fl_str_mv |
HEMEPROTEINS SULFIDE BINDING KINETIC MEASUREMENTS STEERED MOLECULAR DYNAMICS |
| topic |
HEMEPROTEINS SULFIDE BINDING KINETIC MEASUREMENTS STEERED MOLECULAR DYNAMICS |
| 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 reaction of hydrogen sulfide (H2S) with hemeproteins is a key physiological reaction; still, its mechanism and implications are not completely understood. In this work, we propose a combination of experimental and theoretical tools to shed light on the reaction in model system microperoxidase 11 (MP11-FeIII) and myoglobin (Mb-FeIII), from the estimation of the intrinsic binding constants of the species H2S and hydrosulfide (HS-), and the computational description of the overall binding process. Our results show that H2S and HS- are the main reactive species in Mb-FeIII and MP11-FeIII, respectively, and that the magnitude of their intrinsic binding constants are similar to most of the binding constants reported so far for hemeproteins systems and model compounds. However, while the binding of HS- to Mb-FeIII was negligible, the binding of H2S to MP11-FeIII was significant, providing a frame for a discriminated analysis of both species and revealing differential mechanistic aspects. A joint inspection of the kinetic data and the free energy profiles of the binding processes suggests that a dissociative mechanism with the release of a coordinated water molecule as rate limiting step is operative in the binding of H2S to Mb-FeIII and that the binding of HS- is prevented in the access to the protein matrix. For the MP11-FeIII case, where no access restrictions for the ligands are present, an associative component in the mechanism seems to be operative. Overall, the results suggest that if accessing the active site then both H2S and HS- are capable of binding a ferric heme moiety. Fil: Boubeta, Fernando Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Bieza, Silvina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Bringas, Mauro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina Fil: Estrin, Dario Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Boechi, Leonardo. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Cálculo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Bari, Sara Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina |
| description |
The reaction of hydrogen sulfide (H2S) with hemeproteins is a key physiological reaction; still, its mechanism and implications are not completely understood. In this work, we propose a combination of experimental and theoretical tools to shed light on the reaction in model system microperoxidase 11 (MP11-FeIII) and myoglobin (Mb-FeIII), from the estimation of the intrinsic binding constants of the species H2S and hydrosulfide (HS-), and the computational description of the overall binding process. Our results show that H2S and HS- are the main reactive species in Mb-FeIII and MP11-FeIII, respectively, and that the magnitude of their intrinsic binding constants are similar to most of the binding constants reported so far for hemeproteins systems and model compounds. However, while the binding of HS- to Mb-FeIII was negligible, the binding of H2S to MP11-FeIII was significant, providing a frame for a discriminated analysis of both species and revealing differential mechanistic aspects. A joint inspection of the kinetic data and the free energy profiles of the binding processes suggests that a dissociative mechanism with the release of a coordinated water molecule as rate limiting step is operative in the binding of H2S to Mb-FeIII and that the binding of HS- is prevented in the access to the protein matrix. For the MP11-FeIII case, where no access restrictions for the ligands are present, an associative component in the mechanism seems to be operative. Overall, the results suggest that if accessing the active site then both H2S and HS- are capable of binding a ferric heme moiety. |
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2018 |
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2018-07 |
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http://hdl.handle.net/11336/89310 Boubeta, Fernando Martín; Bieza, Silvina Andrea; Bringas, Mauro; Estrin, Dario Ariel; Boechi, Leonardo; et al.; Mechanism of Sulfide Binding by Ferric Hemeproteins; American Chemical Society; Inorganic Chemistry; 57; 13; 7-2018; 7591-7600 0020-1669 CONICET Digital CONICET |
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Boubeta, Fernando Martín; Bieza, Silvina Andrea; Bringas, Mauro; Estrin, Dario Ariel; Boechi, Leonardo; et al.; Mechanism of Sulfide Binding by Ferric Hemeproteins; American Chemical Society; Inorganic Chemistry; 57; 13; 7-2018; 7591-7600 0020-1669 CONICET Digital CONICET |
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