MIA40 circumvents the folding constraints imposed by TRIAP1 function
- Autores
- Pujols, Jordi; Fornt Suñé, Marc; Gil García, Marcos; Bartolomé Nafría, Andrea; Canals, Francesc; Cerofolini, Linda; Teilum, Kaare; Banci, Lucia; Esperante, Sebastian; Ventura, Salvador
- Año de publicación
- 2025
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The MIA40 relay system mediates the import of small cysteine-rich proteins into the intermembrane mitochondrial space (IMS). MIA40 substrates are synthesized in the cytosol and assumed to be disordered in their reduced state in this compartment. As they cross the outer mitochondrial membrane, MIA40 promotes the oxidation of critical native disulfides to facilitate folding, trapping functional species in the IMS. Here, we study the redox-controled folding of TRIAP1, a small cysteine-rich protein with moonlighting function: regulating phospholipid trafficking between mitochondrial membranes in the IMS and preventing apoptosis in the cytosol. TRIAP1 dysregulation is connected to oncogenesis. Although TRIAP1 contains a canonical twin CX9C motif, its sequence characteristics and folding pathway deviate from typical MIA40 substrates. In its reduced state, TRIAP1 rapidly populates a hydrophobic collapsed, alpha-helical, and marginally stable molten globule. This intermediate biases oxidative folding towards a non-native Cys37-Cys47 kinetic trap, slowing the reaction. MIA40 accelerates TRIAP1 folding rate by 30-fold, bypassing the formation of this folding trap. MIA40 drives the oxidation of the inner disulfide bond Cys18-Cys37, and subsequently, it can catalyze the formation of the outer disulfide bond Cys8-Cys47 to attain the native two-disulfide-bridged structure. We demonstrate that, unlike most MIA40 substrates, TRIAP1´s folding pathway is strongly constrained by the structural requirements for its function in phospholipid traffic at the IMS. The obligatory population of a reduced, alpha-helical, metastable molten globule in the cytoplasm may explain TRIAP1´s connection to the p53-dependent cell survival pathway, constituting a remarkable example of a functional molten globule state.
Fil: Pujols, Jordi. Universitat Autònoma de Barcelona; España
Fil: Fornt Suñé, Marc. Universitat Autònoma de Barcelona; España
Fil: Gil García, Marcos. Universitat Autònoma de Barcelona; España
Fil: Bartolomé Nafría, Andrea. Universitat Autònoma de Barcelona; España
Fil: Canals, Francesc. Institut d’Oncologia Vall d’Hebron; España
Fil: Cerofolini, Linda. University of Florence; Italia
Fil: Teilum, Kaare. Universidad de Copenhagen; Dinamarca
Fil: Banci, Lucia. University of Florence; Italia
Fil: Esperante, Sebastian. Universidad Nacional de San Martin. Centro de Rediseño E Ingenieria de Proteinas.; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Ventura, Salvador. Universitat Autònoma de Barcelona; España - Materia
-
OXIDATIVE FOLDING
MOLTEN GLOBULE
TRIAP1
MIA CHAPERONE - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/266478
Ver los metadatos del registro completo
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CONICET Digital (CONICET) |
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MIA40 circumvents the folding constraints imposed by TRIAP1 functionPujols, JordiFornt Suñé, MarcGil García, MarcosBartolomé Nafría, AndreaCanals, FrancescCerofolini, LindaTeilum, KaareBanci, LuciaEsperante, SebastianVentura, SalvadorOXIDATIVE FOLDINGMOLTEN GLOBULETRIAP1MIA CHAPERONEhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The MIA40 relay system mediates the import of small cysteine-rich proteins into the intermembrane mitochondrial space (IMS). MIA40 substrates are synthesized in the cytosol and assumed to be disordered in their reduced state in this compartment. As they cross the outer mitochondrial membrane, MIA40 promotes the oxidation of critical native disulfides to facilitate folding, trapping functional species in the IMS. Here, we study the redox-controled folding of TRIAP1, a small cysteine-rich protein with moonlighting function: regulating phospholipid trafficking between mitochondrial membranes in the IMS and preventing apoptosis in the cytosol. TRIAP1 dysregulation is connected to oncogenesis. Although TRIAP1 contains a canonical twin CX9C motif, its sequence characteristics and folding pathway deviate from typical MIA40 substrates. In its reduced state, TRIAP1 rapidly populates a hydrophobic collapsed, alpha-helical, and marginally stable molten globule. This intermediate biases oxidative folding towards a non-native Cys37-Cys47 kinetic trap, slowing the reaction. MIA40 accelerates TRIAP1 folding rate by 30-fold, bypassing the formation of this folding trap. MIA40 drives the oxidation of the inner disulfide bond Cys18-Cys37, and subsequently, it can catalyze the formation of the outer disulfide bond Cys8-Cys47 to attain the native two-disulfide-bridged structure. We demonstrate that, unlike most MIA40 substrates, TRIAP1´s folding pathway is strongly constrained by the structural requirements for its function in phospholipid traffic at the IMS. The obligatory population of a reduced, alpha-helical, metastable molten globule in the cytoplasm may explain TRIAP1´s connection to the p53-dependent cell survival pathway, constituting a remarkable example of a functional molten globule state.Fil: Pujols, Jordi. Universitat Autònoma de Barcelona; EspañaFil: Fornt Suñé, Marc. Universitat Autònoma de Barcelona; EspañaFil: Gil García, Marcos. Universitat Autònoma de Barcelona; EspañaFil: Bartolomé Nafría, Andrea. Universitat Autònoma de Barcelona; EspañaFil: Canals, Francesc. Institut d’Oncologia Vall d’Hebron; EspañaFil: Cerofolini, Linda. University of Florence; ItaliaFil: Teilum, Kaare. Universidad de Copenhagen; DinamarcaFil: Banci, Lucia. University of Florence; ItaliaFil: Esperante, Sebastian. Universidad Nacional de San Martin. Centro de Rediseño E Ingenieria de Proteinas.; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ventura, Salvador. Universitat Autònoma de Barcelona; EspañaElsevier2025-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/266478Pujols, Jordi; Fornt Suñé, Marc; Gil García, Marcos; Bartolomé Nafría, Andrea; Canals, Francesc; et al.; MIA40 circumvents the folding constraints imposed by TRIAP1 function; Elsevier; Journal of Biological Chemistry (online); 301; 3; 3-2025; 1-170021-9258CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0021925825001152info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jbc.2025.108268info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:40:22Zoai:ri.conicet.gov.ar:11336/266478instacron: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 10:40:22.378CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
MIA40 circumvents the folding constraints imposed by TRIAP1 function |
title |
MIA40 circumvents the folding constraints imposed by TRIAP1 function |
spellingShingle |
MIA40 circumvents the folding constraints imposed by TRIAP1 function Pujols, Jordi OXIDATIVE FOLDING MOLTEN GLOBULE TRIAP1 MIA CHAPERONE |
title_short |
MIA40 circumvents the folding constraints imposed by TRIAP1 function |
title_full |
MIA40 circumvents the folding constraints imposed by TRIAP1 function |
title_fullStr |
MIA40 circumvents the folding constraints imposed by TRIAP1 function |
title_full_unstemmed |
MIA40 circumvents the folding constraints imposed by TRIAP1 function |
title_sort |
MIA40 circumvents the folding constraints imposed by TRIAP1 function |
dc.creator.none.fl_str_mv |
Pujols, Jordi Fornt Suñé, Marc Gil García, Marcos Bartolomé Nafría, Andrea Canals, Francesc Cerofolini, Linda Teilum, Kaare Banci, Lucia Esperante, Sebastian Ventura, Salvador |
author |
Pujols, Jordi |
author_facet |
Pujols, Jordi Fornt Suñé, Marc Gil García, Marcos Bartolomé Nafría, Andrea Canals, Francesc Cerofolini, Linda Teilum, Kaare Banci, Lucia Esperante, Sebastian Ventura, Salvador |
author_role |
author |
author2 |
Fornt Suñé, Marc Gil García, Marcos Bartolomé Nafría, Andrea Canals, Francesc Cerofolini, Linda Teilum, Kaare Banci, Lucia Esperante, Sebastian Ventura, Salvador |
author2_role |
author author author author author author author author author |
dc.subject.none.fl_str_mv |
OXIDATIVE FOLDING MOLTEN GLOBULE TRIAP1 MIA CHAPERONE |
topic |
OXIDATIVE FOLDING MOLTEN GLOBULE TRIAP1 MIA CHAPERONE |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The MIA40 relay system mediates the import of small cysteine-rich proteins into the intermembrane mitochondrial space (IMS). MIA40 substrates are synthesized in the cytosol and assumed to be disordered in their reduced state in this compartment. As they cross the outer mitochondrial membrane, MIA40 promotes the oxidation of critical native disulfides to facilitate folding, trapping functional species in the IMS. Here, we study the redox-controled folding of TRIAP1, a small cysteine-rich protein with moonlighting function: regulating phospholipid trafficking between mitochondrial membranes in the IMS and preventing apoptosis in the cytosol. TRIAP1 dysregulation is connected to oncogenesis. Although TRIAP1 contains a canonical twin CX9C motif, its sequence characteristics and folding pathway deviate from typical MIA40 substrates. In its reduced state, TRIAP1 rapidly populates a hydrophobic collapsed, alpha-helical, and marginally stable molten globule. This intermediate biases oxidative folding towards a non-native Cys37-Cys47 kinetic trap, slowing the reaction. MIA40 accelerates TRIAP1 folding rate by 30-fold, bypassing the formation of this folding trap. MIA40 drives the oxidation of the inner disulfide bond Cys18-Cys37, and subsequently, it can catalyze the formation of the outer disulfide bond Cys8-Cys47 to attain the native two-disulfide-bridged structure. We demonstrate that, unlike most MIA40 substrates, TRIAP1´s folding pathway is strongly constrained by the structural requirements for its function in phospholipid traffic at the IMS. The obligatory population of a reduced, alpha-helical, metastable molten globule in the cytoplasm may explain TRIAP1´s connection to the p53-dependent cell survival pathway, constituting a remarkable example of a functional molten globule state. Fil: Pujols, Jordi. Universitat Autònoma de Barcelona; España Fil: Fornt Suñé, Marc. Universitat Autònoma de Barcelona; España Fil: Gil García, Marcos. Universitat Autònoma de Barcelona; España Fil: Bartolomé Nafría, Andrea. Universitat Autònoma de Barcelona; España Fil: Canals, Francesc. Institut d’Oncologia Vall d’Hebron; España Fil: Cerofolini, Linda. University of Florence; Italia Fil: Teilum, Kaare. Universidad de Copenhagen; Dinamarca Fil: Banci, Lucia. University of Florence; Italia Fil: Esperante, Sebastian. Universidad Nacional de San Martin. Centro de Rediseño E Ingenieria de Proteinas.; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Ventura, Salvador. Universitat Autònoma de Barcelona; España |
description |
The MIA40 relay system mediates the import of small cysteine-rich proteins into the intermembrane mitochondrial space (IMS). MIA40 substrates are synthesized in the cytosol and assumed to be disordered in their reduced state in this compartment. As they cross the outer mitochondrial membrane, MIA40 promotes the oxidation of critical native disulfides to facilitate folding, trapping functional species in the IMS. Here, we study the redox-controled folding of TRIAP1, a small cysteine-rich protein with moonlighting function: regulating phospholipid trafficking between mitochondrial membranes in the IMS and preventing apoptosis in the cytosol. TRIAP1 dysregulation is connected to oncogenesis. Although TRIAP1 contains a canonical twin CX9C motif, its sequence characteristics and folding pathway deviate from typical MIA40 substrates. In its reduced state, TRIAP1 rapidly populates a hydrophobic collapsed, alpha-helical, and marginally stable molten globule. This intermediate biases oxidative folding towards a non-native Cys37-Cys47 kinetic trap, slowing the reaction. MIA40 accelerates TRIAP1 folding rate by 30-fold, bypassing the formation of this folding trap. MIA40 drives the oxidation of the inner disulfide bond Cys18-Cys37, and subsequently, it can catalyze the formation of the outer disulfide bond Cys8-Cys47 to attain the native two-disulfide-bridged structure. We demonstrate that, unlike most MIA40 substrates, TRIAP1´s folding pathway is strongly constrained by the structural requirements for its function in phospholipid traffic at the IMS. The obligatory population of a reduced, alpha-helical, metastable molten globule in the cytoplasm may explain TRIAP1´s connection to the p53-dependent cell survival pathway, constituting a remarkable example of a functional molten globule state. |
publishDate |
2025 |
dc.date.none.fl_str_mv |
2025-03 |
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/11336/266478 Pujols, Jordi; Fornt Suñé, Marc; Gil García, Marcos; Bartolomé Nafría, Andrea; Canals, Francesc; et al.; MIA40 circumvents the folding constraints imposed by TRIAP1 function; Elsevier; Journal of Biological Chemistry (online); 301; 3; 3-2025; 1-17 0021-9258 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/266478 |
identifier_str_mv |
Pujols, Jordi; Fornt Suñé, Marc; Gil García, Marcos; Bartolomé Nafría, Andrea; Canals, Francesc; et al.; MIA40 circumvents the folding constraints imposed by TRIAP1 function; Elsevier; Journal of Biological Chemistry (online); 301; 3; 3-2025; 1-17 0021-9258 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0021925825001152 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jbc.2025.108268 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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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 |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |