Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3

Autores
Favarolo, María Belen
Año de publicación
2016
Idioma
inglés
Tipo de recurso
tesis de maestría
Estado
versión aceptada
Colaborador/a o director/a de tesis
Baumeister, Ralph
Bredeston, Luis M.
Adamo, Ana
Abdian, Patricia
Rühe, Jürgen
Descripción
The nucleotide-sugar transporters (NSTs) are integral membrane proteins of the Golgi apparatus \nand the Endoplasmic Reticulum (ER), that controls the flux of nucleotide-sugars from the cytosol to \nthe lumen, where they serve as substrate for specific glycosyltransferases during the synthesis of \ndiverse glycoconjugates (glycolipids, glycoproteins and proteoglycans). The NSTs are members of \nSLC35 family, a group of highly conserved hydrophobic proteins with multiple transmembrane \ndomains with a size of 30-40kDa. Mutations in these proteins, cause development anomalies in \neukaryotic organisms, from protozoa to mammals, indicating the physiological relevance of these \ntransporters. \nFor the nucleotide-sugar transport process an antiporter mechanism, nucleotide sugar/ nucleoside \nmonophosphate, have been proposed. Nevertheless the molecular basis of ligand recognition and \ntransport is unknown. Like other membrane transport proteins the progress in structure-function \nstudies are limited due to the complexity in the transport activity characterization assays and the \ndifficulty to obtain large amounts of purified protein. In this context the general aim of this work \nwas to determine the transport mechanism of NST at a molecular level, using the murine SLC35A3 \ntransporter, specific for UDP-GlcNAc as a model. Based on bioinformatics tools, GFP-Fusion \ntechnology, a complementation activity assay and cysteine scanning mutagenesis we developed an \napproach to identify and characterize residues critical for the UDP-GlcNAc transport activity by \nSLC35A3. We functionally characterized the MmSLC35A3 transporter as a UDP-GlcNAc \ntransporter based on bioinformatic tools, phenotypic correction and Cysteine Scanning Mutagenesis \nassays. Two critical residues for the MmSLC35A3 functioning, Glu47 and Lys50, localized in the \nsecond transmembrane domain were identified. On the other hand, based on the approach \ndeveloped by Newstead et al (2007), we were able to optimize the MmSLC35A3 expression and \npurification, obtaining a yield of 3.9 mg of protein per L of culture, estimating that this approach \nwill leads to a function-structure studies on MmSLC35A3 pure. This last approach will be based on the labeling of the cysteine residues on the cysteine unique mutants with fluorescents probes. The \nobjective of this label is to know which residues are exposed to the cytosolic or the luminal space
Fil: Favarolo, María Belen. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Buenos Aires, Argentina
Magister de la Universidad de Buenos Aires en Ciencias Biomédicas
Materia
Glicosilación
Transporte
Estructura-función
Transporter
Structure
Function
Ciencias de la vida
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
Repositorio Digital Institucional de la Universidad de Buenos Aires
Institución
Universidad de Buenos Aires
OAI Identificador
oai:RDI UBA:afamaster:HWA_2811

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oai_identifier_str oai:RDI UBA:afamaster:HWA_2811
network_acronym_str RDIUBA
repository_id_str
network_name_str Repositorio Digital Institucional de la Universidad de Buenos Aires
spelling Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3Estudios de estructura-función sobre el transportador de UDP-GlcNAc, SLC35A3Favarolo, María BelenGlicosilaciónTransporteEstructura-funciónTransporterStructureFunctionCiencias de la vidaThe nucleotide-sugar transporters (NSTs) are integral membrane proteins of the Golgi apparatus \nand the Endoplasmic Reticulum (ER), that controls the flux of nucleotide-sugars from the cytosol to \nthe lumen, where they serve as substrate for specific glycosyltransferases during the synthesis of \ndiverse glycoconjugates (glycolipids, glycoproteins and proteoglycans). The NSTs are members of \nSLC35 family, a group of highly conserved hydrophobic proteins with multiple transmembrane \ndomains with a size of 30-40kDa. Mutations in these proteins, cause development anomalies in \neukaryotic organisms, from protozoa to mammals, indicating the physiological relevance of these \ntransporters. \nFor the nucleotide-sugar transport process an antiporter mechanism, nucleotide sugar/ nucleoside \nmonophosphate, have been proposed. Nevertheless the molecular basis of ligand recognition and \ntransport is unknown. Like other membrane transport proteins the progress in structure-function \nstudies are limited due to the complexity in the transport activity characterization assays and the \ndifficulty to obtain large amounts of purified protein. In this context the general aim of this work \nwas to determine the transport mechanism of NST at a molecular level, using the murine SLC35A3 \ntransporter, specific for UDP-GlcNAc as a model. Based on bioinformatics tools, GFP-Fusion \ntechnology, a complementation activity assay and cysteine scanning mutagenesis we developed an \napproach to identify and characterize residues critical for the UDP-GlcNAc transport activity by \nSLC35A3. We functionally characterized the MmSLC35A3 transporter as a UDP-GlcNAc \ntransporter based on bioinformatic tools, phenotypic correction and Cysteine Scanning Mutagenesis \nassays. Two critical residues for the MmSLC35A3 functioning, Glu47 and Lys50, localized in the \nsecond transmembrane domain were identified. On the other hand, based on the approach \ndeveloped by Newstead et al (2007), we were able to optimize the MmSLC35A3 expression and \npurification, obtaining a yield of 3.9 mg of protein per L of culture, estimating that this approach \nwill leads to a function-structure studies on MmSLC35A3 pure. This last approach will be based on the labeling of the cysteine residues on the cysteine unique mutants with fluorescents probes. The \nobjective of this label is to know which residues are exposed to the cytosolic or the luminal space Fil: Favarolo, María Belen. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Buenos Aires, ArgentinaMagister de la Universidad de Buenos Aires en Ciencias BiomédicasUniversidad de Buenos Aires. Facultad de Farmacia y BioquímicaBaumeister, RalphBredeston, Luis M.Adamo, AnaAbdian, PatriciaRühe, Jürgen2016-11-23info:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_bdccinfo:ar-repo/semantics/tesisDeMaestriaapplication/pdfhttp://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=afamaster&cl=CL1&d=HWA_2811https://repositoriouba.sisbi.uba.ar/gsdl/collect/afamaster/index/assoc/HWA_2811.dir/2811.PDFenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:Repositorio Digital Institucional de la Universidad de Buenos Airesinstname:Universidad de Buenos Aires2025-09-29T15:13:07Zoai:RDI UBA:afamaster:HWA_2811instacron:UBAInstitucionalhttp://repositoriouba.sisbi.uba.ar/Universidad públicahttps://www.uba.ar/http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/oaiserver.cgicferrando@sisbi.uba.arArgentinaopendoar:2025-09-29 15:13:07.804Repositorio Digital Institucional de la Universidad de Buenos Aires - Universidad de Buenos Airesfalse
dc.title.none.fl_str_mv Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3
Estudios de estructura-función sobre el transportador de UDP-GlcNAc, SLC35A3
title Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3
spellingShingle Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3
Favarolo, María Belen
Glicosilación
Transporte
Estructura-función
Transporter
Structure
Function
Ciencias de la vida
title_short Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3
title_full Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3
title_fullStr Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3
title_full_unstemmed Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3
title_sort Study of the structure and the function of the UDP-GlcNAc transporter, SLC35A3
dc.creator.none.fl_str_mv Favarolo, María Belen
author Favarolo, María Belen
author_facet Favarolo, María Belen
author_role author
dc.contributor.none.fl_str_mv Baumeister, Ralph
Bredeston, Luis M.
Adamo, Ana
Abdian, Patricia
Rühe, Jürgen
dc.subject.none.fl_str_mv Glicosilación
Transporte
Estructura-función
Transporter
Structure
Function
Ciencias de la vida
topic Glicosilación
Transporte
Estructura-función
Transporter
Structure
Function
Ciencias de la vida
dc.description.none.fl_txt_mv The nucleotide-sugar transporters (NSTs) are integral membrane proteins of the Golgi apparatus \nand the Endoplasmic Reticulum (ER), that controls the flux of nucleotide-sugars from the cytosol to \nthe lumen, where they serve as substrate for specific glycosyltransferases during the synthesis of \ndiverse glycoconjugates (glycolipids, glycoproteins and proteoglycans). The NSTs are members of \nSLC35 family, a group of highly conserved hydrophobic proteins with multiple transmembrane \ndomains with a size of 30-40kDa. Mutations in these proteins, cause development anomalies in \neukaryotic organisms, from protozoa to mammals, indicating the physiological relevance of these \ntransporters. \nFor the nucleotide-sugar transport process an antiporter mechanism, nucleotide sugar/ nucleoside \nmonophosphate, have been proposed. Nevertheless the molecular basis of ligand recognition and \ntransport is unknown. Like other membrane transport proteins the progress in structure-function \nstudies are limited due to the complexity in the transport activity characterization assays and the \ndifficulty to obtain large amounts of purified protein. In this context the general aim of this work \nwas to determine the transport mechanism of NST at a molecular level, using the murine SLC35A3 \ntransporter, specific for UDP-GlcNAc as a model. Based on bioinformatics tools, GFP-Fusion \ntechnology, a complementation activity assay and cysteine scanning mutagenesis we developed an \napproach to identify and characterize residues critical for the UDP-GlcNAc transport activity by \nSLC35A3. We functionally characterized the MmSLC35A3 transporter as a UDP-GlcNAc \ntransporter based on bioinformatic tools, phenotypic correction and Cysteine Scanning Mutagenesis \nassays. Two critical residues for the MmSLC35A3 functioning, Glu47 and Lys50, localized in the \nsecond transmembrane domain were identified. On the other hand, based on the approach \ndeveloped by Newstead et al (2007), we were able to optimize the MmSLC35A3 expression and \npurification, obtaining a yield of 3.9 mg of protein per L of culture, estimating that this approach \nwill leads to a function-structure studies on MmSLC35A3 pure. This last approach will be based on the labeling of the cysteine residues on the cysteine unique mutants with fluorescents probes. The \nobjective of this label is to know which residues are exposed to the cytosolic or the luminal space
Fil: Favarolo, María Belen. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Buenos Aires, Argentina
Magister de la Universidad de Buenos Aires en Ciencias Biomédicas
description The nucleotide-sugar transporters (NSTs) are integral membrane proteins of the Golgi apparatus \nand the Endoplasmic Reticulum (ER), that controls the flux of nucleotide-sugars from the cytosol to \nthe lumen, where they serve as substrate for specific glycosyltransferases during the synthesis of \ndiverse glycoconjugates (glycolipids, glycoproteins and proteoglycans). The NSTs are members of \nSLC35 family, a group of highly conserved hydrophobic proteins with multiple transmembrane \ndomains with a size of 30-40kDa. Mutations in these proteins, cause development anomalies in \neukaryotic organisms, from protozoa to mammals, indicating the physiological relevance of these \ntransporters. \nFor the nucleotide-sugar transport process an antiporter mechanism, nucleotide sugar/ nucleoside \nmonophosphate, have been proposed. Nevertheless the molecular basis of ligand recognition and \ntransport is unknown. Like other membrane transport proteins the progress in structure-function \nstudies are limited due to the complexity in the transport activity characterization assays and the \ndifficulty to obtain large amounts of purified protein. In this context the general aim of this work \nwas to determine the transport mechanism of NST at a molecular level, using the murine SLC35A3 \ntransporter, specific for UDP-GlcNAc as a model. Based on bioinformatics tools, GFP-Fusion \ntechnology, a complementation activity assay and cysteine scanning mutagenesis we developed an \napproach to identify and characterize residues critical for the UDP-GlcNAc transport activity by \nSLC35A3. We functionally characterized the MmSLC35A3 transporter as a UDP-GlcNAc \ntransporter based on bioinformatic tools, phenotypic correction and Cysteine Scanning Mutagenesis \nassays. Two critical residues for the MmSLC35A3 functioning, Glu47 and Lys50, localized in the \nsecond transmembrane domain were identified. On the other hand, based on the approach \ndeveloped by Newstead et al (2007), we were able to optimize the MmSLC35A3 expression and \npurification, obtaining a yield of 3.9 mg of protein per L of culture, estimating that this approach \nwill leads to a function-structure studies on MmSLC35A3 pure. This last approach will be based on the labeling of the cysteine residues on the cysteine unique mutants with fluorescents probes. The \nobjective of this label is to know which residues are exposed to the cytosolic or the luminal space
publishDate 2016
dc.date.none.fl_str_mv 2016-11-23
dc.type.none.fl_str_mv info:eu-repo/semantics/masterThesis
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_bdcc
info:ar-repo/semantics/tesisDeMaestria
format masterThesis
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=afamaster&cl=CL1&d=HWA_2811
https://repositoriouba.sisbi.uba.ar/gsdl/collect/afamaster/index/assoc/HWA_2811.dir/2811.PDF
url http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=afamaster&cl=CL1&d=HWA_2811
https://repositoriouba.sisbi.uba.ar/gsdl/collect/afamaster/index/assoc/HWA_2811.dir/2811.PDF
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica
publisher.none.fl_str_mv Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica
dc.source.none.fl_str_mv reponame:Repositorio Digital Institucional de la Universidad de Buenos Aires
instname:Universidad de Buenos Aires
reponame_str Repositorio Digital Institucional de la Universidad de Buenos Aires
collection Repositorio Digital Institucional de la Universidad de Buenos Aires
instname_str Universidad de Buenos Aires
repository.name.fl_str_mv Repositorio Digital Institucional de la Universidad de Buenos Aires - Universidad de Buenos Aires
repository.mail.fl_str_mv cferrando@sisbi.uba.ar
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