Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells
- Autores
- Vilcaes, Aldo Alejandro; Torres Demichelis, Vanina Andrea; Daniotti, Jose Luis
- Año de publicación
- 2011
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Gangliosides are acidic glycosphingolipids that contain sialicacid residues and are expressed in nearly all vertebrate cells.They are synthesized at the Golgi complex by a combination ofglycosyltransferase activities followed by vesicular delivery tothe plasma membrane, where they participate in a variety ofphysiological as well as pathological processes. Recently, a numberof enzymes of ganglioside anabolism and catabolism havebeen shown to be associated with the plasma membrane. In particular,it was observed that CMP-NeuAc:GM3 sialyltransferase(Sial-T2) is able to sialylate GM3 at the plasma membrane (ciscatalyticactivity). In this work, we demonstrated that plasmamembrane-integrated ecto-Sial-T2 also displays a trans-catalyticactivity at the cell surface of epithelial and melanoma cells.By using a highly sensitive enzyme-linked immunosorbent assaycombined with confocal fluorescence microscopy, we observedthat ecto-Sial-T2 was able to sialylate hydrophobically or covalentlyimmobilized GM3 onto a solid surface. More interestingly,we observed that ecto-Sial-T2 was able to sialylate GM3exposed on the membrane of neighboring cells by using both theexogenous and endogenous donor substrate (CMP-N-acetylneuraminicacid) available at the extracellular milieu. In addition,the trans-activity of ecto-Sial-T2 was considerably reducedwhen the expression of the acceptor substrate was inhibited byusing a specific inhibitor of biosynthesis of glycolipids, indicatingthe lipidic nature of the acceptor. Our findings provide thefirst direct evidence that an ecto-sialyltransferase is able totrans-sialylate substrates exposed in the plasma membranefrom mammalian cells, which represents a novel insight into themolecular events that regulate the local glycosphingolipidcomposition.
Fil: Vilcaes, Aldo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; Argentina
Fil: Torres Demichelis, Vanina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; Argentina
Fil: Daniotti, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; Argentina - Materia
-
GLYCOSYLTRANSFERASES
GANGLIOSIDES
PLASMA MEMBRANE
ECTO SYALYLTRANSFERASES - 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:11336/230262
Ver los metadatos del registro completo
id |
CONICETDig_76f4428ce22d4a2538ebcf86c4ac9db4 |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/230262 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cellsVilcaes, Aldo AlejandroTorres Demichelis, Vanina AndreaDaniotti, Jose LuisGLYCOSYLTRANSFERASESGANGLIOSIDESPLASMA MEMBRANEECTO SYALYLTRANSFERASEShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Gangliosides are acidic glycosphingolipids that contain sialicacid residues and are expressed in nearly all vertebrate cells.They are synthesized at the Golgi complex by a combination ofglycosyltransferase activities followed by vesicular delivery tothe plasma membrane, where they participate in a variety ofphysiological as well as pathological processes. Recently, a numberof enzymes of ganglioside anabolism and catabolism havebeen shown to be associated with the plasma membrane. In particular,it was observed that CMP-NeuAc:GM3 sialyltransferase(Sial-T2) is able to sialylate GM3 at the plasma membrane (ciscatalyticactivity). In this work, we demonstrated that plasmamembrane-integrated ecto-Sial-T2 also displays a trans-catalyticactivity at the cell surface of epithelial and melanoma cells.By using a highly sensitive enzyme-linked immunosorbent assaycombined with confocal fluorescence microscopy, we observedthat ecto-Sial-T2 was able to sialylate hydrophobically or covalentlyimmobilized GM3 onto a solid surface. More interestingly,we observed that ecto-Sial-T2 was able to sialylate GM3exposed on the membrane of neighboring cells by using both theexogenous and endogenous donor substrate (CMP-N-acetylneuraminicacid) available at the extracellular milieu. In addition,the trans-activity of ecto-Sial-T2 was considerably reducedwhen the expression of the acceptor substrate was inhibited byusing a specific inhibitor of biosynthesis of glycolipids, indicatingthe lipidic nature of the acceptor. Our findings provide thefirst direct evidence that an ecto-sialyltransferase is able totrans-sialylate substrates exposed in the plasma membranefrom mammalian cells, which represents a novel insight into themolecular events that regulate the local glycosphingolipidcomposition.Fil: Vilcaes, Aldo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; ArgentinaFil: Torres Demichelis, Vanina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; ArgentinaFil: Daniotti, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; ArgentinaAmerican Society for Biochemistry and Molecular Biology2011-09-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/230262Vilcaes, Aldo Alejandro; Torres Demichelis, Vanina Andrea; Daniotti, Jose Luis; Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells; American Society for Biochemistry and Molecular Biology; Journal of Biological Chemistry (online); 286; 36; 9-9-2011; 31437-314460021-92581083-351XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0021925820722532info:eu-repo/semantics/altIdentifier/doi/10.1074/jbc.M111.257196info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:04:23Zoai:ri.conicet.gov.ar:11336/230262instacron: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 10:04:24.448CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells |
title |
Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells |
spellingShingle |
Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells Vilcaes, Aldo Alejandro GLYCOSYLTRANSFERASES GANGLIOSIDES PLASMA MEMBRANE ECTO SYALYLTRANSFERASES |
title_short |
Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells |
title_full |
Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells |
title_fullStr |
Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells |
title_full_unstemmed |
Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells |
title_sort |
Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells |
dc.creator.none.fl_str_mv |
Vilcaes, Aldo Alejandro Torres Demichelis, Vanina Andrea Daniotti, Jose Luis |
author |
Vilcaes, Aldo Alejandro |
author_facet |
Vilcaes, Aldo Alejandro Torres Demichelis, Vanina Andrea Daniotti, Jose Luis |
author_role |
author |
author2 |
Torres Demichelis, Vanina Andrea Daniotti, Jose Luis |
author2_role |
author author |
dc.subject.none.fl_str_mv |
GLYCOSYLTRANSFERASES GANGLIOSIDES PLASMA MEMBRANE ECTO SYALYLTRANSFERASES |
topic |
GLYCOSYLTRANSFERASES GANGLIOSIDES PLASMA MEMBRANE ECTO SYALYLTRANSFERASES |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Gangliosides are acidic glycosphingolipids that contain sialicacid residues and are expressed in nearly all vertebrate cells.They are synthesized at the Golgi complex by a combination ofglycosyltransferase activities followed by vesicular delivery tothe plasma membrane, where they participate in a variety ofphysiological as well as pathological processes. Recently, a numberof enzymes of ganglioside anabolism and catabolism havebeen shown to be associated with the plasma membrane. In particular,it was observed that CMP-NeuAc:GM3 sialyltransferase(Sial-T2) is able to sialylate GM3 at the plasma membrane (ciscatalyticactivity). In this work, we demonstrated that plasmamembrane-integrated ecto-Sial-T2 also displays a trans-catalyticactivity at the cell surface of epithelial and melanoma cells.By using a highly sensitive enzyme-linked immunosorbent assaycombined with confocal fluorescence microscopy, we observedthat ecto-Sial-T2 was able to sialylate hydrophobically or covalentlyimmobilized GM3 onto a solid surface. More interestingly,we observed that ecto-Sial-T2 was able to sialylate GM3exposed on the membrane of neighboring cells by using both theexogenous and endogenous donor substrate (CMP-N-acetylneuraminicacid) available at the extracellular milieu. In addition,the trans-activity of ecto-Sial-T2 was considerably reducedwhen the expression of the acceptor substrate was inhibited byusing a specific inhibitor of biosynthesis of glycolipids, indicatingthe lipidic nature of the acceptor. Our findings provide thefirst direct evidence that an ecto-sialyltransferase is able totrans-sialylate substrates exposed in the plasma membranefrom mammalian cells, which represents a novel insight into themolecular events that regulate the local glycosphingolipidcomposition. Fil: Vilcaes, Aldo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; Argentina Fil: Torres Demichelis, Vanina Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; Argentina Fil: Daniotti, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Química Biológica de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Centro de Investigaciones en Química Biológica de Córdoba; Argentina |
description |
Gangliosides are acidic glycosphingolipids that contain sialicacid residues and are expressed in nearly all vertebrate cells.They are synthesized at the Golgi complex by a combination ofglycosyltransferase activities followed by vesicular delivery tothe plasma membrane, where they participate in a variety ofphysiological as well as pathological processes. Recently, a numberof enzymes of ganglioside anabolism and catabolism havebeen shown to be associated with the plasma membrane. In particular,it was observed that CMP-NeuAc:GM3 sialyltransferase(Sial-T2) is able to sialylate GM3 at the plasma membrane (ciscatalyticactivity). In this work, we demonstrated that plasmamembrane-integrated ecto-Sial-T2 also displays a trans-catalyticactivity at the cell surface of epithelial and melanoma cells.By using a highly sensitive enzyme-linked immunosorbent assaycombined with confocal fluorescence microscopy, we observedthat ecto-Sial-T2 was able to sialylate hydrophobically or covalentlyimmobilized GM3 onto a solid surface. More interestingly,we observed that ecto-Sial-T2 was able to sialylate GM3exposed on the membrane of neighboring cells by using both theexogenous and endogenous donor substrate (CMP-N-acetylneuraminicacid) available at the extracellular milieu. In addition,the trans-activity of ecto-Sial-T2 was considerably reducedwhen the expression of the acceptor substrate was inhibited byusing a specific inhibitor of biosynthesis of glycolipids, indicatingthe lipidic nature of the acceptor. Our findings provide thefirst direct evidence that an ecto-sialyltransferase is able totrans-sialylate substrates exposed in the plasma membranefrom mammalian cells, which represents a novel insight into themolecular events that regulate the local glycosphingolipidcomposition. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-09-09 |
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/11336/230262 Vilcaes, Aldo Alejandro; Torres Demichelis, Vanina Andrea; Daniotti, Jose Luis; Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells; American Society for Biochemistry and Molecular Biology; Journal of Biological Chemistry (online); 286; 36; 9-9-2011; 31437-31446 0021-9258 1083-351X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/230262 |
identifier_str_mv |
Vilcaes, Aldo Alejandro; Torres Demichelis, Vanina Andrea; Daniotti, Jose Luis; Trans-activity of plasma membrane-associated ganglioside sialyltransferase in mammalian cells; American Society for Biochemistry and Molecular Biology; Journal of Biological Chemistry (online); 286; 36; 9-9-2011; 31437-31446 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/https://www.sciencedirect.com/science/article/pii/S0021925820722532 info:eu-repo/semantics/altIdentifier/doi/10.1074/jbc.M111.257196 |
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 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 |
_version_ |
1842269854399201280 |
score |
13.13397 |