A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries
- Autores
- Lasala, Matías Marcelo; Corradi, Jeremias; Bruzzone, Ariana; Esandi, María del Carmen; Bouzat, Cecilia Beatriz
- Año de publicación
- 2018
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The cholinergic 7 nicotinic receptor gene, CHRNA7, encodes a subunit that forms the homopentameric 7 receptor, involved in learning and memory. In humans, exons 5–10 in CHRNA7 are duplicated and fused to the FAM7A genetic element, giving rise to the hybrid gene CHRFAM7A. Its product, dup7, is a truncated subunit lacking part of the N-terminal extracellular ligand-binding domain and is associated with neurological disorders, including schizophrenia, and immunomodulation. We combined dup7 expression on mammalian cells with patch clamp recordings to understand its functional role. Transfected cells expressed dup7 protein, but they exhibited neither surface binding of the 7 antagonist -bungaro-toxin nor responses to acetylcholine (ACh) or to an allosteric agonist that binds to the conserved transmembrane region. To determine whether dup7 assembles with 7, we generated receptors comprising 7 and dup7 subunits, one of which was tagged with conductance substitutions that report subunit stoichiometry and monitored ACh-elicited channel openings in the presence of a positive allosteric 7 modulator. We found that 7 and dup7 subunits co-assemble into functional heteromeric receptors, which require at least two 7 subunits for channel opening, and that dup7’s presence in the pentameric arrangement does not affect the duration of the potentiated events compared with that of 7. Using an 7 subunit mutant, we found that activation of (7) 2 (dup7) 3 receptors occurs through ACh binding at the 7/7 interfacial binding site. Our study contributes to the understanding of the modulation of 7 function by the human specific, duplicated subunit, associated with human disorders.
Fil: Lasala, Matías Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Corradi, Jeremias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Bruzzone, Ariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
Fil: Esandi, María del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Bouzat, Cecilia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina - Materia
-
NICOTINIC RECEPTORS
PATCH-CLAMP
CYS-LOOP - 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:11336/85971
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A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometriesLasala, Matías MarceloCorradi, JeremiasBruzzone, ArianaEsandi, María del CarmenBouzat, Cecilia BeatrizNICOTINIC RECEPTORSPATCH-CLAMPCYS-LOOPhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The cholinergic 7 nicotinic receptor gene, CHRNA7, encodes a subunit that forms the homopentameric 7 receptor, involved in learning and memory. In humans, exons 5–10 in CHRNA7 are duplicated and fused to the FAM7A genetic element, giving rise to the hybrid gene CHRFAM7A. Its product, dup7, is a truncated subunit lacking part of the N-terminal extracellular ligand-binding domain and is associated with neurological disorders, including schizophrenia, and immunomodulation. We combined dup7 expression on mammalian cells with patch clamp recordings to understand its functional role. Transfected cells expressed dup7 protein, but they exhibited neither surface binding of the 7 antagonist -bungaro-toxin nor responses to acetylcholine (ACh) or to an allosteric agonist that binds to the conserved transmembrane region. To determine whether dup7 assembles with 7, we generated receptors comprising 7 and dup7 subunits, one of which was tagged with conductance substitutions that report subunit stoichiometry and monitored ACh-elicited channel openings in the presence of a positive allosteric 7 modulator. We found that 7 and dup7 subunits co-assemble into functional heteromeric receptors, which require at least two 7 subunits for channel opening, and that dup7’s presence in the pentameric arrangement does not affect the duration of the potentiated events compared with that of 7. Using an 7 subunit mutant, we found that activation of (7) 2 (dup7) 3 receptors occurs through ACh binding at the 7/7 interfacial binding site. Our study contributes to the understanding of the modulation of 7 function by the human specific, duplicated subunit, associated with human disorders.Fil: Lasala, Matías Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Corradi, Jeremias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Bruzzone, Ariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; ArgentinaFil: Esandi, María del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Bouzat, Cecilia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaAmerican Society for Biochemistry and Molecular Biology2018-05-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/85971Lasala, Matías Marcelo; Corradi, Jeremias; Bruzzone, Ariana; Esandi, María del Carmen; Bouzat, Cecilia Beatriz; A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries; American Society for Biochemistry and Molecular Biology; Journal of Biological Chemistry (online); 293; 27; 21-5-2018; 10707-107170021-92581083-351XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.jbc.org/lookup/doi/10.1074/jbc.RA117.001698info:eu-repo/semantics/altIdentifier/doi/10.1074/jbc.RA117.001698info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:48Zoai:ri.conicet.gov.ar:11336/85971instacron: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:34982025-09-03 10:06:48.88CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries |
title |
A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries |
spellingShingle |
A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries Lasala, Matías Marcelo NICOTINIC RECEPTORS PATCH-CLAMP CYS-LOOP |
title_short |
A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries |
title_full |
A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries |
title_fullStr |
A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries |
title_full_unstemmed |
A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries |
title_sort |
A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries |
dc.creator.none.fl_str_mv |
Lasala, Matías Marcelo Corradi, Jeremias Bruzzone, Ariana Esandi, María del Carmen Bouzat, Cecilia Beatriz |
author |
Lasala, Matías Marcelo |
author_facet |
Lasala, Matías Marcelo Corradi, Jeremias Bruzzone, Ariana Esandi, María del Carmen Bouzat, Cecilia Beatriz |
author_role |
author |
author2 |
Corradi, Jeremias Bruzzone, Ariana Esandi, María del Carmen Bouzat, Cecilia Beatriz |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
NICOTINIC RECEPTORS PATCH-CLAMP CYS-LOOP |
topic |
NICOTINIC RECEPTORS PATCH-CLAMP CYS-LOOP |
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 cholinergic 7 nicotinic receptor gene, CHRNA7, encodes a subunit that forms the homopentameric 7 receptor, involved in learning and memory. In humans, exons 5–10 in CHRNA7 are duplicated and fused to the FAM7A genetic element, giving rise to the hybrid gene CHRFAM7A. Its product, dup7, is a truncated subunit lacking part of the N-terminal extracellular ligand-binding domain and is associated with neurological disorders, including schizophrenia, and immunomodulation. We combined dup7 expression on mammalian cells with patch clamp recordings to understand its functional role. Transfected cells expressed dup7 protein, but they exhibited neither surface binding of the 7 antagonist -bungaro-toxin nor responses to acetylcholine (ACh) or to an allosteric agonist that binds to the conserved transmembrane region. To determine whether dup7 assembles with 7, we generated receptors comprising 7 and dup7 subunits, one of which was tagged with conductance substitutions that report subunit stoichiometry and monitored ACh-elicited channel openings in the presence of a positive allosteric 7 modulator. We found that 7 and dup7 subunits co-assemble into functional heteromeric receptors, which require at least two 7 subunits for channel opening, and that dup7’s presence in the pentameric arrangement does not affect the duration of the potentiated events compared with that of 7. Using an 7 subunit mutant, we found that activation of (7) 2 (dup7) 3 receptors occurs through ACh binding at the 7/7 interfacial binding site. Our study contributes to the understanding of the modulation of 7 function by the human specific, duplicated subunit, associated with human disorders. Fil: Lasala, Matías Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina Fil: Corradi, Jeremias. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina Fil: Bruzzone, Ariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina Fil: Esandi, María del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina Fil: Bouzat, Cecilia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina |
description |
The cholinergic 7 nicotinic receptor gene, CHRNA7, encodes a subunit that forms the homopentameric 7 receptor, involved in learning and memory. In humans, exons 5–10 in CHRNA7 are duplicated and fused to the FAM7A genetic element, giving rise to the hybrid gene CHRFAM7A. Its product, dup7, is a truncated subunit lacking part of the N-terminal extracellular ligand-binding domain and is associated with neurological disorders, including schizophrenia, and immunomodulation. We combined dup7 expression on mammalian cells with patch clamp recordings to understand its functional role. Transfected cells expressed dup7 protein, but they exhibited neither surface binding of the 7 antagonist -bungaro-toxin nor responses to acetylcholine (ACh) or to an allosteric agonist that binds to the conserved transmembrane region. To determine whether dup7 assembles with 7, we generated receptors comprising 7 and dup7 subunits, one of which was tagged with conductance substitutions that report subunit stoichiometry and monitored ACh-elicited channel openings in the presence of a positive allosteric 7 modulator. We found that 7 and dup7 subunits co-assemble into functional heteromeric receptors, which require at least two 7 subunits for channel opening, and that dup7’s presence in the pentameric arrangement does not affect the duration of the potentiated events compared with that of 7. Using an 7 subunit mutant, we found that activation of (7) 2 (dup7) 3 receptors occurs through ACh binding at the 7/7 interfacial binding site. Our study contributes to the understanding of the modulation of 7 function by the human specific, duplicated subunit, associated with human disorders. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-05-21 |
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/11336/85971 Lasala, Matías Marcelo; Corradi, Jeremias; Bruzzone, Ariana; Esandi, María del Carmen; Bouzat, Cecilia Beatriz; A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries; American Society for Biochemistry and Molecular Biology; Journal of Biological Chemistry (online); 293; 27; 21-5-2018; 10707-10717 0021-9258 1083-351X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/85971 |
identifier_str_mv |
Lasala, Matías Marcelo; Corradi, Jeremias; Bruzzone, Ariana; Esandi, María del Carmen; Bouzat, Cecilia Beatriz; A human-specific, truncated α7 nicotinic receptor subunit assembles with full-length α7 and forms functional receptors with different stoichiometries; American Society for Biochemistry and Molecular Biology; Journal of Biological Chemistry (online); 293; 27; 21-5-2018; 10707-10717 0021-9258 1083-351X CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://www.jbc.org/lookup/doi/10.1074/jbc.RA117.001698 info:eu-repo/semantics/altIdentifier/doi/10.1074/jbc.RA117.001698 |
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 |
dc.publisher.none.fl_str_mv |
American Society for Biochemistry and Molecular Biology |
publisher.none.fl_str_mv |
American Society for Biochemistry and Molecular Biology |
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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1842269975260168192 |
score |
13.13397 |