Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica
- Autores
- Martínez, Lucila Inés; Piattoni, Claudia Vanesa; Garay, Alberto; Rodrigues, Daniel Enrique; Guerrero, Sergio Adrian; Iglesias, Alberto Alvaro
- Año de publicación
- 2011
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Amoebiasis is an intestinal infection caused by the human pathogen Entamoeba histolytica and representing the third leading cause of death by parasites in the world. Host-parasite interactions mainly involve anchored glycoconjugates localized in the surface of the parasitic cell. In protozoa, synthesis of structural oligo- and polysaccharides occurs via UDP-glucose, generated in a reaction catalyzed by UDP-glucose pyrophosphorylase. We report the molecular cloning of the gene coding for this enzyme from genomic DNA of E. histolytica and its recombinant expression in Escherichia coli cells. The purified enzyme was kinetically characterized, catalyzing UDP-glucose synthesis and pyrophosphorolysis with V(max) values of 95 U/mg and 3 U/mg, respectively, and affinity for substrates comparable to those found for the enzyme from other sources. Enzyme activity was affected by redox modification of thiol groups. Different oxidants, including diamide, hydrogen peroxide and sodium nitroprusside inactivated the enzyme. The process was completely reverted by reducing agents, mainly cysteine, dithiothreitol, and thioredoxin. Characterization of the enzyme mutants C94S, C108S, C191S, C354S, C378S, C108/378S, M106S and M106C supported a molecular mechanism for the redox regulation. Molecular modeling confirmed the role of specific cysteine and methionine residues as targets for redox modification in the entamoebic enzyme. Our results suggest that UDP-glucose pyrophosphorylase is a regulated enzyme in E. histolytica. Interestingly, results strongly agree with the occurrence of a physiological redox mechanism modulating enzyme activity, which would critically affect carbohydrate metabolism in the protozoon.
Fil: Martínez, Lucila Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
Fil: Piattoni, Claudia Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
Fil: Garay, Alberto. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Departamento de Física; Argentina
Fil: Rodrigues, Daniel Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina
Fil: Guerrero, Sergio Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina
Fil: Iglesias, Alberto Alvaro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina - Materia
-
Udp-Glucose Pyrophosphorylase
Entamoeba Histolytica
Redox
Carbohydrate Metabolism - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/13555
Ver los metadatos del registro completo
id |
CONICETDig_b15b233e331f657f1ee89058c99157f8 |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/13555 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolyticaMartínez, Lucila InésPiattoni, Claudia VanesaGaray, AlbertoRodrigues, Daniel EnriqueGuerrero, Sergio AdrianIglesias, Alberto AlvaroUdp-Glucose PyrophosphorylaseEntamoeba HistolyticaRedoxCarbohydrate Metabolismhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Amoebiasis is an intestinal infection caused by the human pathogen Entamoeba histolytica and representing the third leading cause of death by parasites in the world. Host-parasite interactions mainly involve anchored glycoconjugates localized in the surface of the parasitic cell. In protozoa, synthesis of structural oligo- and polysaccharides occurs via UDP-glucose, generated in a reaction catalyzed by UDP-glucose pyrophosphorylase. We report the molecular cloning of the gene coding for this enzyme from genomic DNA of E. histolytica and its recombinant expression in Escherichia coli cells. The purified enzyme was kinetically characterized, catalyzing UDP-glucose synthesis and pyrophosphorolysis with V(max) values of 95 U/mg and 3 U/mg, respectively, and affinity for substrates comparable to those found for the enzyme from other sources. Enzyme activity was affected by redox modification of thiol groups. Different oxidants, including diamide, hydrogen peroxide and sodium nitroprusside inactivated the enzyme. The process was completely reverted by reducing agents, mainly cysteine, dithiothreitol, and thioredoxin. Characterization of the enzyme mutants C94S, C108S, C191S, C354S, C378S, C108/378S, M106S and M106C supported a molecular mechanism for the redox regulation. Molecular modeling confirmed the role of specific cysteine and methionine residues as targets for redox modification in the entamoebic enzyme. Our results suggest that UDP-glucose pyrophosphorylase is a regulated enzyme in E. histolytica. Interestingly, results strongly agree with the occurrence of a physiological redox mechanism modulating enzyme activity, which would critically affect carbohydrate metabolism in the protozoon.Fil: Martínez, Lucila Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); ArgentinaFil: Piattoni, Claudia Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); ArgentinaFil: Garay, Alberto. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Departamento de Física; ArgentinaFil: Rodrigues, Daniel Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; ArgentinaFil: Guerrero, Sergio Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); ArgentinaFil: Iglesias, Alberto Alvaro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); ArgentinaElsevier France-editions Scientifiques Medicales Elsevier2011-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/13555Martínez, Lucila Inés; Piattoni, Claudia Vanesa; Garay, Alberto; Rodrigues, Daniel Enrique; Guerrero, Sergio Adrian; et al.; Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica; Elsevier France-editions Scientifiques Medicales Elsevier; Biochimie; 93; 2; 2-2011; 260-2680300-9084enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.biochi.2010.09.019info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0300908410003354info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:17:13Zoai:ri.conicet.gov.ar:11336/13555instacron: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 10:17:13.956CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica |
title |
Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica |
spellingShingle |
Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica Martínez, Lucila Inés Udp-Glucose Pyrophosphorylase Entamoeba Histolytica Redox Carbohydrate Metabolism |
title_short |
Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica |
title_full |
Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica |
title_fullStr |
Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica |
title_full_unstemmed |
Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica |
title_sort |
Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica |
dc.creator.none.fl_str_mv |
Martínez, Lucila Inés Piattoni, Claudia Vanesa Garay, Alberto Rodrigues, Daniel Enrique Guerrero, Sergio Adrian Iglesias, Alberto Alvaro |
author |
Martínez, Lucila Inés |
author_facet |
Martínez, Lucila Inés Piattoni, Claudia Vanesa Garay, Alberto Rodrigues, Daniel Enrique Guerrero, Sergio Adrian Iglesias, Alberto Alvaro |
author_role |
author |
author2 |
Piattoni, Claudia Vanesa Garay, Alberto Rodrigues, Daniel Enrique Guerrero, Sergio Adrian Iglesias, Alberto Alvaro |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Udp-Glucose Pyrophosphorylase Entamoeba Histolytica Redox Carbohydrate Metabolism |
topic |
Udp-Glucose Pyrophosphorylase Entamoeba Histolytica Redox Carbohydrate Metabolism |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Amoebiasis is an intestinal infection caused by the human pathogen Entamoeba histolytica and representing the third leading cause of death by parasites in the world. Host-parasite interactions mainly involve anchored glycoconjugates localized in the surface of the parasitic cell. In protozoa, synthesis of structural oligo- and polysaccharides occurs via UDP-glucose, generated in a reaction catalyzed by UDP-glucose pyrophosphorylase. We report the molecular cloning of the gene coding for this enzyme from genomic DNA of E. histolytica and its recombinant expression in Escherichia coli cells. The purified enzyme was kinetically characterized, catalyzing UDP-glucose synthesis and pyrophosphorolysis with V(max) values of 95 U/mg and 3 U/mg, respectively, and affinity for substrates comparable to those found for the enzyme from other sources. Enzyme activity was affected by redox modification of thiol groups. Different oxidants, including diamide, hydrogen peroxide and sodium nitroprusside inactivated the enzyme. The process was completely reverted by reducing agents, mainly cysteine, dithiothreitol, and thioredoxin. Characterization of the enzyme mutants C94S, C108S, C191S, C354S, C378S, C108/378S, M106S and M106C supported a molecular mechanism for the redox regulation. Molecular modeling confirmed the role of specific cysteine and methionine residues as targets for redox modification in the entamoebic enzyme. Our results suggest that UDP-glucose pyrophosphorylase is a regulated enzyme in E. histolytica. Interestingly, results strongly agree with the occurrence of a physiological redox mechanism modulating enzyme activity, which would critically affect carbohydrate metabolism in the protozoon. Fil: Martínez, Lucila Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina Fil: Piattoni, Claudia Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina Fil: Garay, Alberto. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Departamento de Física; Argentina Fil: Rodrigues, Daniel Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina Fil: Guerrero, Sergio Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina Fil: Iglesias, Alberto Alvaro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina |
description |
Amoebiasis is an intestinal infection caused by the human pathogen Entamoeba histolytica and representing the third leading cause of death by parasites in the world. Host-parasite interactions mainly involve anchored glycoconjugates localized in the surface of the parasitic cell. In protozoa, synthesis of structural oligo- and polysaccharides occurs via UDP-glucose, generated in a reaction catalyzed by UDP-glucose pyrophosphorylase. We report the molecular cloning of the gene coding for this enzyme from genomic DNA of E. histolytica and its recombinant expression in Escherichia coli cells. The purified enzyme was kinetically characterized, catalyzing UDP-glucose synthesis and pyrophosphorolysis with V(max) values of 95 U/mg and 3 U/mg, respectively, and affinity for substrates comparable to those found for the enzyme from other sources. Enzyme activity was affected by redox modification of thiol groups. Different oxidants, including diamide, hydrogen peroxide and sodium nitroprusside inactivated the enzyme. The process was completely reverted by reducing agents, mainly cysteine, dithiothreitol, and thioredoxin. Characterization of the enzyme mutants C94S, C108S, C191S, C354S, C378S, C108/378S, M106S and M106C supported a molecular mechanism for the redox regulation. Molecular modeling confirmed the role of specific cysteine and methionine residues as targets for redox modification in the entamoebic enzyme. Our results suggest that UDP-glucose pyrophosphorylase is a regulated enzyme in E. histolytica. Interestingly, results strongly agree with the occurrence of a physiological redox mechanism modulating enzyme activity, which would critically affect carbohydrate metabolism in the protozoon. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-02 |
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/11336/13555 Martínez, Lucila Inés; Piattoni, Claudia Vanesa; Garay, Alberto; Rodrigues, Daniel Enrique; Guerrero, Sergio Adrian; et al.; Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica; Elsevier France-editions Scientifiques Medicales Elsevier; Biochimie; 93; 2; 2-2011; 260-268 0300-9084 |
url |
http://hdl.handle.net/11336/13555 |
identifier_str_mv |
Martínez, Lucila Inés; Piattoni, Claudia Vanesa; Garay, Alberto; Rodrigues, Daniel Enrique; Guerrero, Sergio Adrian; et al.; Redox Regulation of UDP-glucose Pyrophosphorylase from Entamoeba histolytica; Elsevier France-editions Scientifiques Medicales Elsevier; Biochimie; 93; 2; 2-2011; 260-268 0300-9084 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.biochi.2010.09.019 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0300908410003354 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier France-editions Scientifiques Medicales Elsevier |
publisher.none.fl_str_mv |
Elsevier France-editions Scientifiques Medicales Elsevier |
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_ |
1844614123672829952 |
score |
13.070432 |