Insights into the selectivity mechanisms of grapevine NIP aquaporins
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.5/20391 |
Resumo: | Nodulin 26-like intrinsic proteins (NIPs) of the plant aquaporin family majorly facilitate the transport of physiologically relevant solutes. The present study intended to investigate how substrate selectivity in grapevine NIPs is influenced by the aromatic/arginine (ar/R) selectivity filter within the pore and the possible underlying mechanisms. A mutational approach was used to interchange the ar/R residues between grapevine NIPs (VvTnNIP1;1 withUniversidade de Lisboa, VvTnNIP6;1, and VvTnNIP2;1 with VvTnNIP5;1). Their functional characterization by stopped-flow spectroscopy in Saccharomyces cerevisiae revealed that mutations in residues of H2/H5 helices in VvTnNIP1;1 and VvTnNIP6;1 caused a general decline in membrane glycerol permeability but did not impart the expected substrate conductivity in the mutants. This result suggests that ar/R filter substitution could alter the NIP channel activity, but it was not su cient to interchange their substrate preferences. Further, homology modeling analyses evidenced that variations in the pore radius combined with the di erences in the channel’s physicochemical properties (hydrophilicity/hydrophobicity) may drive substrate selectivity. Furthermore, yeast growth assays showed that H5 residue substitution alleviated the sensitivity of VvTnNIP2;1 and VvTnNIP5;1 to As, B, and Se, implying importance of H5 sequence for substrate selection. These results contribute to the knowledge of the overall determinants of substrate selectivity in NIPs |
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Insights into the selectivity mechanisms of grapevine NIP aquaporinsnodulin 26-like intrinsic proteinsgrapevinear/R selectivity filtersite-directed mutagenesissubstrate selectivityhomology modelingNodulin 26-like intrinsic proteins (NIPs) of the plant aquaporin family majorly facilitate the transport of physiologically relevant solutes. The present study intended to investigate how substrate selectivity in grapevine NIPs is influenced by the aromatic/arginine (ar/R) selectivity filter within the pore and the possible underlying mechanisms. A mutational approach was used to interchange the ar/R residues between grapevine NIPs (VvTnNIP1;1 withUniversidade de Lisboa, VvTnNIP6;1, and VvTnNIP2;1 with VvTnNIP5;1). Their functional characterization by stopped-flow spectroscopy in Saccharomyces cerevisiae revealed that mutations in residues of H2/H5 helices in VvTnNIP1;1 and VvTnNIP6;1 caused a general decline in membrane glycerol permeability but did not impart the expected substrate conductivity in the mutants. This result suggests that ar/R filter substitution could alter the NIP channel activity, but it was not su cient to interchange their substrate preferences. Further, homology modeling analyses evidenced that variations in the pore radius combined with the di erences in the channel’s physicochemical properties (hydrophilicity/hydrophobicity) may drive substrate selectivity. Furthermore, yeast growth assays showed that H5 residue substitution alleviated the sensitivity of VvTnNIP2;1 and VvTnNIP5;1 to As, B, and Se, implying importance of H5 sequence for substrate selection. These results contribute to the knowledge of the overall determinants of substrate selectivity in NIPsMDPIRepositório da Universidade de LisboaSabir, FarzanaDi Pizzio, AntonellaLoureiro-Dias, M. C.Casini, AngelaSoveral, GraçaPrista, Catarina2020-09-24T13:26:13Z20202020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/20391engInt. J. Mol. Sci. 2020, 21, 669710.3390/ijms21186697info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:49:50Zoai:www.repository.utl.pt:10400.5/20391Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:05:09.160326Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Insights into the selectivity mechanisms of grapevine NIP aquaporins |
title |
Insights into the selectivity mechanisms of grapevine NIP aquaporins |
spellingShingle |
Insights into the selectivity mechanisms of grapevine NIP aquaporins Sabir, Farzana nodulin 26-like intrinsic proteins grapevine ar/R selectivity filter site-directed mutagenesis substrate selectivity homology modeling |
title_short |
Insights into the selectivity mechanisms of grapevine NIP aquaporins |
title_full |
Insights into the selectivity mechanisms of grapevine NIP aquaporins |
title_fullStr |
Insights into the selectivity mechanisms of grapevine NIP aquaporins |
title_full_unstemmed |
Insights into the selectivity mechanisms of grapevine NIP aquaporins |
title_sort |
Insights into the selectivity mechanisms of grapevine NIP aquaporins |
author |
Sabir, Farzana |
author_facet |
Sabir, Farzana Di Pizzio, Antonella Loureiro-Dias, M. C. Casini, Angela Soveral, Graça Prista, Catarina |
author_role |
author |
author2 |
Di Pizzio, Antonella Loureiro-Dias, M. C. Casini, Angela Soveral, Graça Prista, Catarina |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Sabir, Farzana Di Pizzio, Antonella Loureiro-Dias, M. C. Casini, Angela Soveral, Graça Prista, Catarina |
dc.subject.por.fl_str_mv |
nodulin 26-like intrinsic proteins grapevine ar/R selectivity filter site-directed mutagenesis substrate selectivity homology modeling |
topic |
nodulin 26-like intrinsic proteins grapevine ar/R selectivity filter site-directed mutagenesis substrate selectivity homology modeling |
description |
Nodulin 26-like intrinsic proteins (NIPs) of the plant aquaporin family majorly facilitate the transport of physiologically relevant solutes. The present study intended to investigate how substrate selectivity in grapevine NIPs is influenced by the aromatic/arginine (ar/R) selectivity filter within the pore and the possible underlying mechanisms. A mutational approach was used to interchange the ar/R residues between grapevine NIPs (VvTnNIP1;1 withUniversidade de Lisboa, VvTnNIP6;1, and VvTnNIP2;1 with VvTnNIP5;1). Their functional characterization by stopped-flow spectroscopy in Saccharomyces cerevisiae revealed that mutations in residues of H2/H5 helices in VvTnNIP1;1 and VvTnNIP6;1 caused a general decline in membrane glycerol permeability but did not impart the expected substrate conductivity in the mutants. This result suggests that ar/R filter substitution could alter the NIP channel activity, but it was not su cient to interchange their substrate preferences. Further, homology modeling analyses evidenced that variations in the pore radius combined with the di erences in the channel’s physicochemical properties (hydrophilicity/hydrophobicity) may drive substrate selectivity. Furthermore, yeast growth assays showed that H5 residue substitution alleviated the sensitivity of VvTnNIP2;1 and VvTnNIP5;1 to As, B, and Se, implying importance of H5 sequence for substrate selection. These results contribute to the knowledge of the overall determinants of substrate selectivity in NIPs |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-09-24T13:26:13Z 2020 2020-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.5/20391 |
url |
http://hdl.handle.net/10400.5/20391 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Int. J. Mol. Sci. 2020, 21, 6697 10.3390/ijms21186697 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799131143954497536 |