Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model
- Autores
- Palacios, Oscar; Perez Rafael, Silvia; Pagani, María Ayelén; Dallinger, Reinhard; Atrian, Silvia; Capdevila, Merce
- Año de publicación
- 2014
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The Helix pomatia metallothionein (MT) system, namely, its two highly specific forms, HpCdMT and HpCuMT, has offered once again an optimum model to study metal?protein specificity. The present work investigates the most unexplored aspect of the coordination behavior of MT polypeptides with respect to either cognate or noncognate metal ions, as opposed to the standard studies of cognate metal ion coordination. To this end, we analyzed the in vivo synthesis of the corresponding complexes with their noncognate metals, and we performed a detailed spectroscopic and spectrometric study of the Zn2+/Cd2+ and Zn2+/Cu+ in vitro replacement reactions on the initial Zn-HpMT species. An HpCuMTAla site-directed mutant, exhibiting differential Cu+-binding abilities in vivo, was also included in this study. We demonstrate that when an MT binds its cognate metal, it yields well-folded complexes of limited stoichiometry, representative of minimal-energy conformations. In contrast, the incorporation of noncognate metal ions is better attributed to an unspecific reaction of cysteinic thiolate groups with metal ions, which is dependent on their concentration in the surrounding milieu, where no minimal-energy structure is reached, and otherwise, the MT peptide acts as a multidentate ligand that will bind metal ions until its capacity has been saturated. Additionally, we suggest that previous binding of an MT polypeptide with its noncognate metal ion (e.g., binding of Zn2+ to the HpCuMT isoform) may preclude the correct folding of the complex with its cognate metal ion.
Fil: Palacios, Oscar. Universitat Autònoma de Barcelona; España
Fil: Perez Rafael, Silvia. Universitat Autònoma de Barcelona; España
Fil: Pagani, María Ayelén. Universidad de Barcelona; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Centro de Estudios Fotosintéticos y Bioquímicos. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Centro de Estudios Fotosintéticos y Bioquímicos; Argentina
Fil: Dallinger, Reinhard. Universidad de Innsbruck; Austria
Fil: Atrian, Silvia. Universidad de Barcelona; España
Fil: Capdevila, Merce. Universitat Autònoma de Barcelona; España - Materia
-
HELIX POMATIA
METALLOTHIONEIN
CU-SPECIFIC
CD-SPECIFIC - 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:11336/233263
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Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a modelPalacios, OscarPerez Rafael, SilviaPagani, María AyelénDallinger, ReinhardAtrian, SilviaCapdevila, MerceHELIX POMATIAMETALLOTHIONEINCU-SPECIFICCD-SPECIFIChttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The Helix pomatia metallothionein (MT) system, namely, its two highly specific forms, HpCdMT and HpCuMT, has offered once again an optimum model to study metal?protein specificity. The present work investigates the most unexplored aspect of the coordination behavior of MT polypeptides with respect to either cognate or noncognate metal ions, as opposed to the standard studies of cognate metal ion coordination. To this end, we analyzed the in vivo synthesis of the corresponding complexes with their noncognate metals, and we performed a detailed spectroscopic and spectrometric study of the Zn2+/Cd2+ and Zn2+/Cu+ in vitro replacement reactions on the initial Zn-HpMT species. An HpCuMTAla site-directed mutant, exhibiting differential Cu+-binding abilities in vivo, was also included in this study. We demonstrate that when an MT binds its cognate metal, it yields well-folded complexes of limited stoichiometry, representative of minimal-energy conformations. In contrast, the incorporation of noncognate metal ions is better attributed to an unspecific reaction of cysteinic thiolate groups with metal ions, which is dependent on their concentration in the surrounding milieu, where no minimal-energy structure is reached, and otherwise, the MT peptide acts as a multidentate ligand that will bind metal ions until its capacity has been saturated. Additionally, we suggest that previous binding of an MT polypeptide with its noncognate metal ion (e.g., binding of Zn2+ to the HpCuMT isoform) may preclude the correct folding of the complex with its cognate metal ion.Fil: Palacios, Oscar. Universitat Autònoma de Barcelona; EspañaFil: Perez Rafael, Silvia. Universitat Autònoma de Barcelona; EspañaFil: Pagani, María Ayelén. Universidad de Barcelona; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Centro de Estudios Fotosintéticos y Bioquímicos. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Centro de Estudios Fotosintéticos y Bioquímicos; ArgentinaFil: Dallinger, Reinhard. Universidad de Innsbruck; AustriaFil: Atrian, Silvia. Universidad de Barcelona; EspañaFil: Capdevila, Merce. Universitat Autònoma de Barcelona; EspañaSpringer2014-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfhttp://hdl.handle.net/11336/233263Palacios, Oscar; Perez Rafael, Silvia; Pagani, María Ayelén; Dallinger, Reinhard; Atrian, Silvia; et al.; Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model; Springer; Journal of Biological Inorganic Chemistry; 19; 6; 4-2014; 923-9350949-82571432-1327CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s00775-014-1127-4info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00775-014-1127-4info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:04:56Zoai:ri.conicet.gov.ar:11336/233263instacron: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 10:04:56.786CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model |
title |
Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model |
spellingShingle |
Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model Palacios, Oscar HELIX POMATIA METALLOTHIONEIN CU-SPECIFIC CD-SPECIFIC |
title_short |
Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model |
title_full |
Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model |
title_fullStr |
Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model |
title_full_unstemmed |
Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model |
title_sort |
Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model |
dc.creator.none.fl_str_mv |
Palacios, Oscar Perez Rafael, Silvia Pagani, María Ayelén Dallinger, Reinhard Atrian, Silvia Capdevila, Merce |
author |
Palacios, Oscar |
author_facet |
Palacios, Oscar Perez Rafael, Silvia Pagani, María Ayelén Dallinger, Reinhard Atrian, Silvia Capdevila, Merce |
author_role |
author |
author2 |
Perez Rafael, Silvia Pagani, María Ayelén Dallinger, Reinhard Atrian, Silvia Capdevila, Merce |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
HELIX POMATIA METALLOTHIONEIN CU-SPECIFIC CD-SPECIFIC |
topic |
HELIX POMATIA METALLOTHIONEIN CU-SPECIFIC CD-SPECIFIC |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The Helix pomatia metallothionein (MT) system, namely, its two highly specific forms, HpCdMT and HpCuMT, has offered once again an optimum model to study metal?protein specificity. The present work investigates the most unexplored aspect of the coordination behavior of MT polypeptides with respect to either cognate or noncognate metal ions, as opposed to the standard studies of cognate metal ion coordination. To this end, we analyzed the in vivo synthesis of the corresponding complexes with their noncognate metals, and we performed a detailed spectroscopic and spectrometric study of the Zn2+/Cd2+ and Zn2+/Cu+ in vitro replacement reactions on the initial Zn-HpMT species. An HpCuMTAla site-directed mutant, exhibiting differential Cu+-binding abilities in vivo, was also included in this study. We demonstrate that when an MT binds its cognate metal, it yields well-folded complexes of limited stoichiometry, representative of minimal-energy conformations. In contrast, the incorporation of noncognate metal ions is better attributed to an unspecific reaction of cysteinic thiolate groups with metal ions, which is dependent on their concentration in the surrounding milieu, where no minimal-energy structure is reached, and otherwise, the MT peptide acts as a multidentate ligand that will bind metal ions until its capacity has been saturated. Additionally, we suggest that previous binding of an MT polypeptide with its noncognate metal ion (e.g., binding of Zn2+ to the HpCuMT isoform) may preclude the correct folding of the complex with its cognate metal ion. Fil: Palacios, Oscar. Universitat Autònoma de Barcelona; España Fil: Perez Rafael, Silvia. Universitat Autònoma de Barcelona; España Fil: Pagani, María Ayelén. Universidad de Barcelona; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Centro de Estudios Fotosintéticos y Bioquímicos. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Centro de Estudios Fotosintéticos y Bioquímicos; Argentina Fil: Dallinger, Reinhard. Universidad de Innsbruck; Austria Fil: Atrian, Silvia. Universidad de Barcelona; España Fil: Capdevila, Merce. Universitat Autònoma de Barcelona; España |
description |
The Helix pomatia metallothionein (MT) system, namely, its two highly specific forms, HpCdMT and HpCuMT, has offered once again an optimum model to study metal?protein specificity. The present work investigates the most unexplored aspect of the coordination behavior of MT polypeptides with respect to either cognate or noncognate metal ions, as opposed to the standard studies of cognate metal ion coordination. To this end, we analyzed the in vivo synthesis of the corresponding complexes with their noncognate metals, and we performed a detailed spectroscopic and spectrometric study of the Zn2+/Cd2+ and Zn2+/Cu+ in vitro replacement reactions on the initial Zn-HpMT species. An HpCuMTAla site-directed mutant, exhibiting differential Cu+-binding abilities in vivo, was also included in this study. We demonstrate that when an MT binds its cognate metal, it yields well-folded complexes of limited stoichiometry, representative of minimal-energy conformations. In contrast, the incorporation of noncognate metal ions is better attributed to an unspecific reaction of cysteinic thiolate groups with metal ions, which is dependent on their concentration in the surrounding milieu, where no minimal-energy structure is reached, and otherwise, the MT peptide acts as a multidentate ligand that will bind metal ions until its capacity has been saturated. Additionally, we suggest that previous binding of an MT polypeptide with its noncognate metal ion (e.g., binding of Zn2+ to the HpCuMT isoform) may preclude the correct folding of the complex with its cognate metal ion. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04 |
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/11336/233263 Palacios, Oscar; Perez Rafael, Silvia; Pagani, María Ayelén; Dallinger, Reinhard; Atrian, Silvia; et al.; Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model; Springer; Journal of Biological Inorganic Chemistry; 19; 6; 4-2014; 923-935 0949-8257 1432-1327 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/233263 |
identifier_str_mv |
Palacios, Oscar; Perez Rafael, Silvia; Pagani, María Ayelén; Dallinger, Reinhard; Atrian, Silvia; et al.; Cognate and noncognate metal ion coordination in metal-specific metallothioneins: The Helix pomatia system as a model; Springer; Journal of Biological Inorganic Chemistry; 19; 6; 4-2014; 923-935 0949-8257 1432-1327 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00775-014-1127-4 info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00775-014-1127-4 |
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/vnd.openxmlformats-officedocument.wordprocessingml.document application/pdf |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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13.070432 |