Cholesterol effects on α7-nAChR embedded in POPC bilayer
- Autores
- Vietri, Agustin; Obiol, Diego Javier; Amundarain, María Julia; Zamarreño, Fernando; Antollini, Silvia Susana; Costabel, M.
- Año de publicación
- 2022
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- Nicotinic acetylcholine receptors (nAChRs) are ligand-gated ion channels (LGIC) made up of five transmembrane glycoprotein subunits organized pseudosymmetrically around a central pore or channel. They can adopt three main conformational states, in addition to several other intermediate states: a closed (C) or resting (R) state, an open (O) state that occurs after agonist binding, and a desensitized (D) state that occurs after the continued presence of the agonist. Subtle changes in the lipid environment of the nAChRs have great relevance in their activity, causing significant effects on human biology. Two types of lipid positions can be identified for these lipids: annular and non-annular. Non-annular sites are in close contact with the receptor and have a low replacement rate, while the annular ones are further away, with a higher replacement rate. In this work, we use a receptor model based on a known structure (PDB: 7EKI) inserted in a lipid bilayer composed entirely of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) lipids. Lipids at annular sites of the membrane were replaced by cholesterols, obtaining different lipid environments for the receptor. Atomistic Molecular Dynamics were performed for the receptor and the membrane with various combinations of these cholesterols. Physicochemical properties of the membrane and the receptor were analyzed and compared with the results obtained for the control system, which lacks cholesterol molecules.
Fil: Vietri, Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina
Fil: Obiol, Diego Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina
Fil: Amundarain, María Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina
Fil: Zamarreño, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina
Fil: Antollini, Silvia Susana. 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: Costabel, M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina
L Reunión Anual de la Sociedad Argentina de Biofísica
Rosario
Argentina
Sociedad Argentina de Biofísica - Materia
-
nicotinic acetylcholine receptor
cholesterol
lipid-membrane interactions
Atomistic Molecular Dynamics - 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:11336/225296
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Cholesterol effects on α7-nAChR embedded in POPC bilayerVietri, AgustinObiol, Diego JavierAmundarain, María JuliaZamarreño, FernandoAntollini, Silvia SusanaCostabel, M.nicotinic acetylcholine receptorcholesterollipid-membrane interactionsAtomistic Molecular Dynamicshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Nicotinic acetylcholine receptors (nAChRs) are ligand-gated ion channels (LGIC) made up of five transmembrane glycoprotein subunits organized pseudosymmetrically around a central pore or channel. They can adopt three main conformational states, in addition to several other intermediate states: a closed (C) or resting (R) state, an open (O) state that occurs after agonist binding, and a desensitized (D) state that occurs after the continued presence of the agonist. Subtle changes in the lipid environment of the nAChRs have great relevance in their activity, causing significant effects on human biology. Two types of lipid positions can be identified for these lipids: annular and non-annular. Non-annular sites are in close contact with the receptor and have a low replacement rate, while the annular ones are further away, with a higher replacement rate. In this work, we use a receptor model based on a known structure (PDB: 7EKI) inserted in a lipid bilayer composed entirely of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) lipids. Lipids at annular sites of the membrane were replaced by cholesterols, obtaining different lipid environments for the receptor. Atomistic Molecular Dynamics were performed for the receptor and the membrane with various combinations of these cholesterols. Physicochemical properties of the membrane and the receptor were analyzed and compared with the results obtained for the control system, which lacks cholesterol molecules.Fil: Vietri, Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; ArgentinaFil: Obiol, Diego Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; ArgentinaFil: Amundarain, María Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; ArgentinaFil: Zamarreño, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; ArgentinaFil: Antollini, Silvia Susana. 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: Costabel, M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; ArgentinaL Reunión Anual de la Sociedad Argentina de BiofísicaRosarioArgentinaSociedad Argentina de BiofísicaSociedad Argentina de Biofísica2022info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/225296Cholesterol effects on α7-nAChR embedded in POPC bilayer; L Reunión Anual de la Sociedad Argentina de Biofísica; Rosario; Argentina; 2022; 44-44978-987-48938-0-2CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://biofisica.org.ar/reuniones-cientificas/reunionsab-previas/Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:59:44Zoai:ri.conicet.gov.ar:11336/225296instacron: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 09:59:45.247CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Cholesterol effects on α7-nAChR embedded in POPC bilayer |
title |
Cholesterol effects on α7-nAChR embedded in POPC bilayer |
spellingShingle |
Cholesterol effects on α7-nAChR embedded in POPC bilayer Vietri, Agustin nicotinic acetylcholine receptor cholesterol lipid-membrane interactions Atomistic Molecular Dynamics |
title_short |
Cholesterol effects on α7-nAChR embedded in POPC bilayer |
title_full |
Cholesterol effects on α7-nAChR embedded in POPC bilayer |
title_fullStr |
Cholesterol effects on α7-nAChR embedded in POPC bilayer |
title_full_unstemmed |
Cholesterol effects on α7-nAChR embedded in POPC bilayer |
title_sort |
Cholesterol effects on α7-nAChR embedded in POPC bilayer |
dc.creator.none.fl_str_mv |
Vietri, Agustin Obiol, Diego Javier Amundarain, María Julia Zamarreño, Fernando Antollini, Silvia Susana Costabel, M. |
author |
Vietri, Agustin |
author_facet |
Vietri, Agustin Obiol, Diego Javier Amundarain, María Julia Zamarreño, Fernando Antollini, Silvia Susana Costabel, M. |
author_role |
author |
author2 |
Obiol, Diego Javier Amundarain, María Julia Zamarreño, Fernando Antollini, Silvia Susana Costabel, M. |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
nicotinic acetylcholine receptor cholesterol lipid-membrane interactions Atomistic Molecular Dynamics |
topic |
nicotinic acetylcholine receptor cholesterol lipid-membrane interactions Atomistic Molecular Dynamics |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Nicotinic acetylcholine receptors (nAChRs) are ligand-gated ion channels (LGIC) made up of five transmembrane glycoprotein subunits organized pseudosymmetrically around a central pore or channel. They can adopt three main conformational states, in addition to several other intermediate states: a closed (C) or resting (R) state, an open (O) state that occurs after agonist binding, and a desensitized (D) state that occurs after the continued presence of the agonist. Subtle changes in the lipid environment of the nAChRs have great relevance in their activity, causing significant effects on human biology. Two types of lipid positions can be identified for these lipids: annular and non-annular. Non-annular sites are in close contact with the receptor and have a low replacement rate, while the annular ones are further away, with a higher replacement rate. In this work, we use a receptor model based on a known structure (PDB: 7EKI) inserted in a lipid bilayer composed entirely of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) lipids. Lipids at annular sites of the membrane were replaced by cholesterols, obtaining different lipid environments for the receptor. Atomistic Molecular Dynamics were performed for the receptor and the membrane with various combinations of these cholesterols. Physicochemical properties of the membrane and the receptor were analyzed and compared with the results obtained for the control system, which lacks cholesterol molecules. Fil: Vietri, Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina Fil: Obiol, Diego Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina Fil: Amundarain, María Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina Fil: Zamarreño, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina Fil: Antollini, Silvia Susana. 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: Costabel, M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina L Reunión Anual de la Sociedad Argentina de Biofísica Rosario Argentina Sociedad Argentina de Biofísica |
description |
Nicotinic acetylcholine receptors (nAChRs) are ligand-gated ion channels (LGIC) made up of five transmembrane glycoprotein subunits organized pseudosymmetrically around a central pore or channel. They can adopt three main conformational states, in addition to several other intermediate states: a closed (C) or resting (R) state, an open (O) state that occurs after agonist binding, and a desensitized (D) state that occurs after the continued presence of the agonist. Subtle changes in the lipid environment of the nAChRs have great relevance in their activity, causing significant effects on human biology. Two types of lipid positions can be identified for these lipids: annular and non-annular. Non-annular sites are in close contact with the receptor and have a low replacement rate, while the annular ones are further away, with a higher replacement rate. In this work, we use a receptor model based on a known structure (PDB: 7EKI) inserted in a lipid bilayer composed entirely of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) lipids. Lipids at annular sites of the membrane were replaced by cholesterols, obtaining different lipid environments for the receptor. Atomistic Molecular Dynamics were performed for the receptor and the membrane with various combinations of these cholesterols. Physicochemical properties of the membrane and the receptor were analyzed and compared with the results obtained for the control system, which lacks cholesterol molecules. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject Reunión Book http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia |
status_str |
publishedVersion |
format |
conferenceObject |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/225296 Cholesterol effects on α7-nAChR embedded in POPC bilayer; L Reunión Anual de la Sociedad Argentina de Biofísica; Rosario; Argentina; 2022; 44-44 978-987-48938-0-2 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/225296 |
identifier_str_mv |
Cholesterol effects on α7-nAChR embedded in POPC bilayer; L Reunión Anual de la Sociedad Argentina de Biofísica; Rosario; Argentina; 2022; 44-44 978-987-48938-0-2 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://biofisica.org.ar/reuniones-cientificas/reunionsab-previas/ |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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application/pdf application/pdf application/pdf |
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Nacional |
dc.publisher.none.fl_str_mv |
Sociedad Argentina de Biofísica |
publisher.none.fl_str_mv |
Sociedad Argentina de Biofísica |
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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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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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