Structural properties of water confined by phospholipid membranes

Biological membranes are essential for cell life and hydration. Water provides the driving force for the assembly and stability of many cell components. Here, we study the structural properties of water in a phospholipid membrane. We characterize the local structures, inspecting the intermediate ran...

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Detalles Bibliográficos
Autores: Martelli, Fausto, Ko, H.-Y., Calero Borrallo, Carles, Franzese, Giancarlo
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/114450
Acceso en línea:https://hdl.handle.net/2445/114450
Access Level:acceso abierto
Palabra clave:Membranes (Biologia)
Fosfolípids
Hidratació
Aigua
Membranes (Biology)
Phospholipids
Hydration
Water
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spelling Structural properties of water confined by phospholipid membranesMartelli, FaustoKo, H.-Y.Calero Borrallo, CarlesFranzese, GiancarloMembranes (Biologia)FosfolípidsHidratacióAiguaMembranes (Biology)PhospholipidsHydrationWaterBiological membranes are essential for cell life and hydration. Water provides the driving force for the assembly and stability of many cell components. Here, we study the structural properties of water in a phospholipid membrane. We characterize the local structures, inspecting the intermediate range order (IRO) and adopting a sensitive local order metric recently proposed by Martelli et al. that measures and grades the degree of overlap of the local environment with the structures of perfect ice. Close to the membrane, water acquires a high IRO and changes its dynamical properties; i.e., its translational and rotational degrees of freedom slow in a region that extends over ≃ 1 nm from the membrane interface. Surprisingly, we show that at distances as far as ≃ 2.5 nm from the interface, although the bulk-like dynamics are recovered, the IRO of water is still slightly higher than that in the bulk under the same thermodynamic conditions. Therefore, the water-membrane interface has a structural effect at ambient conditions that propagates further than the often-invoked 1-nm length scale. Consequently, this should be considered when analyzing experimental data of water confined by membranes and could help us to understand the role of water in biological systems.Springer Verlag2017201820172017info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion8 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/114450Articles publicats en revistes (Física de la Matèria Condensada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1007/s11467-017-0704-8Frontiers of Physics, 2017, vol. 13, num. 1, p. 136801https://doi.org/10.1007/s11467-017-0704-8(c) Springer Verlag, 2017info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1144502026-05-29T05:05:01Z
dc.title.none.fl_str_mv Structural properties of water confined by phospholipid membranes
title Structural properties of water confined by phospholipid membranes
spellingShingle Structural properties of water confined by phospholipid membranes
Martelli, Fausto
Membranes (Biologia)
Fosfolípids
Hidratació
Aigua
Membranes (Biology)
Phospholipids
Hydration
Water
title_short Structural properties of water confined by phospholipid membranes
title_full Structural properties of water confined by phospholipid membranes
title_fullStr Structural properties of water confined by phospholipid membranes
title_full_unstemmed Structural properties of water confined by phospholipid membranes
title_sort Structural properties of water confined by phospholipid membranes
dc.creator.none.fl_str_mv Martelli, Fausto
Ko, H.-Y.
Calero Borrallo, Carles
Franzese, Giancarlo
author Martelli, Fausto
author_facet Martelli, Fausto
Ko, H.-Y.
Calero Borrallo, Carles
Franzese, Giancarlo
author_role author
author2 Ko, H.-Y.
Calero Borrallo, Carles
Franzese, Giancarlo
author2_role author
author
author
dc.subject.none.fl_str_mv Membranes (Biologia)
Fosfolípids
Hidratació
Aigua
Membranes (Biology)
Phospholipids
Hydration
Water
topic Membranes (Biologia)
Fosfolípids
Hidratació
Aigua
Membranes (Biology)
Phospholipids
Hydration
Water
description Biological membranes are essential for cell life and hydration. Water provides the driving force for the assembly and stability of many cell components. Here, we study the structural properties of water in a phospholipid membrane. We characterize the local structures, inspecting the intermediate range order (IRO) and adopting a sensitive local order metric recently proposed by Martelli et al. that measures and grades the degree of overlap of the local environment with the structures of perfect ice. Close to the membrane, water acquires a high IRO and changes its dynamical properties; i.e., its translational and rotational degrees of freedom slow in a region that extends over ≃ 1 nm from the membrane interface. Surprisingly, we show that at distances as far as ≃ 2.5 nm from the interface, although the bulk-like dynamics are recovered, the IRO of water is still slightly higher than that in the bulk under the same thermodynamic conditions. Therefore, the water-membrane interface has a structural effect at ambient conditions that propagates further than the often-invoked 1-nm length scale. Consequently, this should be considered when analyzing experimental data of water confined by membranes and could help us to understand the role of water in biological systems.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017
2017
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/114450
url https://hdl.handle.net/2445/114450
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1007/s11467-017-0704-8
Frontiers of Physics, 2017, vol. 13, num. 1, p. 136801
https://doi.org/10.1007/s11467-017-0704-8
dc.rights.none.fl_str_mv (c) Springer Verlag, 2017
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Springer Verlag, 2017
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer Verlag
publisher.none.fl_str_mv Springer Verlag
dc.source.none.fl_str_mv Articles publicats en revistes (Física de la Matèria Condensada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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