β-galactosidase activity againts different substrates and in the presence of lipid interfaces

Autores
Flores Mamani, Sandra Soledad; Perillo, Maria Angelica; Sanchez, Julieta Maria
Año de publicación
2013
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Previously we demonstrated that the activity of a soluble wild-type E. coli β-galactosidase (β-Galwt) against both lactose (the natural substrate) as ortho-nitrofenilgalactopiranósido (ONPG, artificial substrate) increases in the presence of multilamellar vesicles (MLVs) composed of neutral and charged phospholipids. The aim of this study was to compare the activity of a recombinant β-Gal (β-GalHis6) against two different substrates in the presence of MLVs of different lipid composition. β-Gal-His6 was overexpressed in E.coli, and the six histidine residues (His-tag) fused to the carboxyl terminus facilitated purification by ion metal affinity chromatography (IMAC). The enzyme activity was measured by visible spectrophotometry, in the absence or presence of MLVs of pure egg phosphatidylcholine (EPC interface) or at 80:20 molar ratio with dioleoylphosphatidyl glycerol (EPC80/DOPG20) negative zwitterionic interface). Kinetic parameters were determined by fitting the michaelian model to the experimental data using nonlinear regression. Our results showed that the enzyme activity was more efficient against ONPG compared to lactose (kcat/KMONPG >kcat/KMLactosa) as previously described for other beta galactosidase. An activation of the enzymatic activity but a decrease in the substrate affinity were observed in the presence of lipid interfaces against both substrates. Those effects were enhanced by the presence of charged interfaces favored by electrostatic interactions mediated by the presence His residues of the enzyme. The nature of the substrate not qualitatively affected the kinetics of the reaction catalyzed by β-Gal-His6 in the presence of lipid interfaces.
Fil: Flores Mamani, Sandra Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
Fil: Perillo, Maria Angelica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
Fil: Sanchez, Julieta Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
XLII Reunión Anual de la Sociedad Argentina de Biofísica
Villa Carlos Paz
Argentina
Sociedad Argentina de Biofísica
Materia
Recombinant beta-galactosidase
Surface charge
Catalytic activity
Surface adsorption
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/234821

id CONICETDig_7c91c362499d09bdc118dc3d1844a638
oai_identifier_str oai:ri.conicet.gov.ar:11336/234821
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling β-galactosidase activity againts different substrates and in the presence of lipid interfacesFlores Mamani, Sandra SoledadPerillo, Maria AngelicaSanchez, Julieta MariaRecombinant beta-galactosidaseSurface chargeCatalytic activitySurface adsorptionhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Previously we demonstrated that the activity of a soluble wild-type E. coli β-galactosidase (β-Galwt) against both lactose (the natural substrate) as ortho-nitrofenilgalactopiranósido (ONPG, artificial substrate) increases in the presence of multilamellar vesicles (MLVs) composed of neutral and charged phospholipids. The aim of this study was to compare the activity of a recombinant β-Gal (β-GalHis6) against two different substrates in the presence of MLVs of different lipid composition. β-Gal-His6 was overexpressed in E.coli, and the six histidine residues (His-tag) fused to the carboxyl terminus facilitated purification by ion metal affinity chromatography (IMAC). The enzyme activity was measured by visible spectrophotometry, in the absence or presence of MLVs of pure egg phosphatidylcholine (EPC interface) or at 80:20 molar ratio with dioleoylphosphatidyl glycerol (EPC80/DOPG20) negative zwitterionic interface). Kinetic parameters were determined by fitting the michaelian model to the experimental data using nonlinear regression. Our results showed that the enzyme activity was more efficient against ONPG compared to lactose (kcat/KMONPG >kcat/KMLactosa) as previously described for other beta galactosidase. An activation of the enzymatic activity but a decrease in the substrate affinity were observed in the presence of lipid interfaces against both substrates. Those effects were enhanced by the presence of charged interfaces favored by electrostatic interactions mediated by the presence His residues of the enzyme. The nature of the substrate not qualitatively affected the kinetics of the reaction catalyzed by β-Gal-His6 in the presence of lipid interfaces.Fil: Flores Mamani, Sandra Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; ArgentinaFil: Perillo, Maria Angelica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; ArgentinaFil: Sanchez, Julieta Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; ArgentinaXLII Reunión Anual de la Sociedad Argentina de BiofísicaVilla Carlos PazArgentinaSociedad Argentina de BiofísicaSociedad Argentina de BiofísicaFanani, Maria LauraWilke, NataliaFidelio, Gerardo Daniel2013info: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/11336/234821β-galactosidase activity againts different substrates and in the presence of lipid interfaces; XLII Reunión Anual de la Sociedad Argentina de Biofísica; Villa Carlos Paz; Argentina; 2013; 75-75978-987-27591-2-4CONICET 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 Técnicas2025-09-29T09:44:57Zoai:ri.conicet.gov.ar:11336/234821instacron: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 09:44:57.998CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv β-galactosidase activity againts different substrates and in the presence of lipid interfaces
title β-galactosidase activity againts different substrates and in the presence of lipid interfaces
spellingShingle β-galactosidase activity againts different substrates and in the presence of lipid interfaces
Flores Mamani, Sandra Soledad
Recombinant beta-galactosidase
Surface charge
Catalytic activity
Surface adsorption
title_short β-galactosidase activity againts different substrates and in the presence of lipid interfaces
title_full β-galactosidase activity againts different substrates and in the presence of lipid interfaces
title_fullStr β-galactosidase activity againts different substrates and in the presence of lipid interfaces
title_full_unstemmed β-galactosidase activity againts different substrates and in the presence of lipid interfaces
title_sort β-galactosidase activity againts different substrates and in the presence of lipid interfaces
dc.creator.none.fl_str_mv Flores Mamani, Sandra Soledad
Perillo, Maria Angelica
Sanchez, Julieta Maria
author Flores Mamani, Sandra Soledad
author_facet Flores Mamani, Sandra Soledad
Perillo, Maria Angelica
Sanchez, Julieta Maria
author_role author
author2 Perillo, Maria Angelica
Sanchez, Julieta Maria
author2_role author
author
dc.contributor.none.fl_str_mv Fanani, Maria Laura
Wilke, Natalia
Fidelio, Gerardo Daniel
dc.subject.none.fl_str_mv Recombinant beta-galactosidase
Surface charge
Catalytic activity
Surface adsorption
topic Recombinant beta-galactosidase
Surface charge
Catalytic activity
Surface adsorption
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Previously we demonstrated that the activity of a soluble wild-type E. coli β-galactosidase (β-Galwt) against both lactose (the natural substrate) as ortho-nitrofenilgalactopiranósido (ONPG, artificial substrate) increases in the presence of multilamellar vesicles (MLVs) composed of neutral and charged phospholipids. The aim of this study was to compare the activity of a recombinant β-Gal (β-GalHis6) against two different substrates in the presence of MLVs of different lipid composition. β-Gal-His6 was overexpressed in E.coli, and the six histidine residues (His-tag) fused to the carboxyl terminus facilitated purification by ion metal affinity chromatography (IMAC). The enzyme activity was measured by visible spectrophotometry, in the absence or presence of MLVs of pure egg phosphatidylcholine (EPC interface) or at 80:20 molar ratio with dioleoylphosphatidyl glycerol (EPC80/DOPG20) negative zwitterionic interface). Kinetic parameters were determined by fitting the michaelian model to the experimental data using nonlinear regression. Our results showed that the enzyme activity was more efficient against ONPG compared to lactose (kcat/KMONPG >kcat/KMLactosa) as previously described for other beta galactosidase. An activation of the enzymatic activity but a decrease in the substrate affinity were observed in the presence of lipid interfaces against both substrates. Those effects were enhanced by the presence of charged interfaces favored by electrostatic interactions mediated by the presence His residues of the enzyme. The nature of the substrate not qualitatively affected the kinetics of the reaction catalyzed by β-Gal-His6 in the presence of lipid interfaces.
Fil: Flores Mamani, Sandra Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
Fil: Perillo, Maria Angelica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
Fil: Sanchez, Julieta Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
XLII Reunión Anual de la Sociedad Argentina de Biofísica
Villa Carlos Paz
Argentina
Sociedad Argentina de Biofísica
description Previously we demonstrated that the activity of a soluble wild-type E. coli β-galactosidase (β-Galwt) against both lactose (the natural substrate) as ortho-nitrofenilgalactopiranósido (ONPG, artificial substrate) increases in the presence of multilamellar vesicles (MLVs) composed of neutral and charged phospholipids. The aim of this study was to compare the activity of a recombinant β-Gal (β-GalHis6) against two different substrates in the presence of MLVs of different lipid composition. β-Gal-His6 was overexpressed in E.coli, and the six histidine residues (His-tag) fused to the carboxyl terminus facilitated purification by ion metal affinity chromatography (IMAC). The enzyme activity was measured by visible spectrophotometry, in the absence or presence of MLVs of pure egg phosphatidylcholine (EPC interface) or at 80:20 molar ratio with dioleoylphosphatidyl glycerol (EPC80/DOPG20) negative zwitterionic interface). Kinetic parameters were determined by fitting the michaelian model to the experimental data using nonlinear regression. Our results showed that the enzyme activity was more efficient against ONPG compared to lactose (kcat/KMONPG >kcat/KMLactosa) as previously described for other beta galactosidase. An activation of the enzymatic activity but a decrease in the substrate affinity were observed in the presence of lipid interfaces against both substrates. Those effects were enhanced by the presence of charged interfaces favored by electrostatic interactions mediated by the presence His residues of the enzyme. The nature of the substrate not qualitatively affected the kinetics of the reaction catalyzed by β-Gal-His6 in the presence of lipid interfaces.
publishDate 2013
dc.date.none.fl_str_mv 2013
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/11336/234821
β-galactosidase activity againts different substrates and in the presence of lipid interfaces; XLII Reunión Anual de la Sociedad Argentina de Biofísica; Villa Carlos Paz; Argentina; 2013; 75-75
978-987-27591-2-4
CONICET Digital
CONICET
url http://hdl.handle.net/11336/234821
identifier_str_mv β-galactosidase activity againts different substrates and in the presence of lipid interfaces; XLII Reunión Anual de la Sociedad Argentina de Biofísica; Villa Carlos Paz; Argentina; 2013; 75-75
978-987-27591-2-4
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/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Sociedad Argentina de Biofísica
publisher.none.fl_str_mv Sociedad Argentina de Biofísica
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_ 1844613415016857600
score 13.070432