The effect of oxidant and the non-oxidant alteration of cellular thiol concentration on the formation of protein mixed-disulfides in HEK 293 cells.

Cellular molecules possess various mechanisms in responding to oxidant stress. In terms of protein responses, protein S-glutathionylation is a unique post-translational modification of protein reactive cysteines forming disulfides with glutathione molecules. This modification has been proposed to pl...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Jasen Lee Gilge, Michael Fisher, Yuh-Cherng Chai
Formato: article
Lenguaje:EN
Publicado: Public Library of Science (PLoS) 2008
Materias:
R
Q
Acceso en línea:https://doaj.org/article/b16eac69d54e4fbf9eb3347fafc7204a
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:b16eac69d54e4fbf9eb3347fafc7204a
record_format dspace
spelling oai:doaj.org-article:b16eac69d54e4fbf9eb3347fafc7204a2021-11-25T06:18:02ZThe effect of oxidant and the non-oxidant alteration of cellular thiol concentration on the formation of protein mixed-disulfides in HEK 293 cells.1932-620310.1371/journal.pone.0004015https://doaj.org/article/b16eac69d54e4fbf9eb3347fafc7204a2008-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19107210/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Cellular molecules possess various mechanisms in responding to oxidant stress. In terms of protein responses, protein S-glutathionylation is a unique post-translational modification of protein reactive cysteines forming disulfides with glutathione molecules. This modification has been proposed to play roles in antioxidant, regulatory and signaling in cells under oxidant stress. Recently, the increased level of protein S-glutathionylation has been linked with the development of diseases. In this report, specific S-glutathionylated proteins were demonstrated in human embryonic kidney 293 cells treated with two different oxidative reagents: diamide and hydrogen peroxide. Diamide is a chemical oxidizing agent whereas hydrogen peroxide is a physiological oxidant. Under the experimental conditions, these two oxidants decreased glutathione concentration without toxicity. S-glutathionylated proteins were detected by immunoblotting and glutathione concentrations were determined by high performance liquid chromatography. We further show the effect of alteration of the cellular thiol pool on the amount of protein S-glutathionylation in oxidant-treated cells. Cellular thiol concentrations were altered either by a specific way using buthionine sulfoximine, a specific inhibitor of glutathione biosynthesis or by a non-specific way, incubating cells in cystine-methionine deficient media. Cells only treated with either buthionine sulfoximine or cystine-methionine deficient media did not induce protein S-glutathionylation, even though both conditions decreased 65% of cellular glutathione. Moreover, the amount of protein S-glutathionylation under both conditions in the presence of oxidants was not altered when compared to the amount observed in regular media with oxidants present. Protein S-glutathionylation is a dynamic reaction which depends on the rate of adding and removing glutathione. Phenylarsine oxide, which specifically forms a covalent adduct with vicinal thiols, was used to determine the possible role of vicinal thiols in the amount of glutathionylation. Our data shows phenylarsine oxide did not change glutathione concentrations, but it did enhance the amount of glutathionylation in oxidant-treated cells.Jasen Lee GilgeMichael FisherYuh-Cherng ChaiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 12, p e4015 (2008)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Jasen Lee Gilge
Michael Fisher
Yuh-Cherng Chai
The effect of oxidant and the non-oxidant alteration of cellular thiol concentration on the formation of protein mixed-disulfides in HEK 293 cells.
description Cellular molecules possess various mechanisms in responding to oxidant stress. In terms of protein responses, protein S-glutathionylation is a unique post-translational modification of protein reactive cysteines forming disulfides with glutathione molecules. This modification has been proposed to play roles in antioxidant, regulatory and signaling in cells under oxidant stress. Recently, the increased level of protein S-glutathionylation has been linked with the development of diseases. In this report, specific S-glutathionylated proteins were demonstrated in human embryonic kidney 293 cells treated with two different oxidative reagents: diamide and hydrogen peroxide. Diamide is a chemical oxidizing agent whereas hydrogen peroxide is a physiological oxidant. Under the experimental conditions, these two oxidants decreased glutathione concentration without toxicity. S-glutathionylated proteins were detected by immunoblotting and glutathione concentrations were determined by high performance liquid chromatography. We further show the effect of alteration of the cellular thiol pool on the amount of protein S-glutathionylation in oxidant-treated cells. Cellular thiol concentrations were altered either by a specific way using buthionine sulfoximine, a specific inhibitor of glutathione biosynthesis or by a non-specific way, incubating cells in cystine-methionine deficient media. Cells only treated with either buthionine sulfoximine or cystine-methionine deficient media did not induce protein S-glutathionylation, even though both conditions decreased 65% of cellular glutathione. Moreover, the amount of protein S-glutathionylation under both conditions in the presence of oxidants was not altered when compared to the amount observed in regular media with oxidants present. Protein S-glutathionylation is a dynamic reaction which depends on the rate of adding and removing glutathione. Phenylarsine oxide, which specifically forms a covalent adduct with vicinal thiols, was used to determine the possible role of vicinal thiols in the amount of glutathionylation. Our data shows phenylarsine oxide did not change glutathione concentrations, but it did enhance the amount of glutathionylation in oxidant-treated cells.
format article
author Jasen Lee Gilge
Michael Fisher
Yuh-Cherng Chai
author_facet Jasen Lee Gilge
Michael Fisher
Yuh-Cherng Chai
author_sort Jasen Lee Gilge
title The effect of oxidant and the non-oxidant alteration of cellular thiol concentration on the formation of protein mixed-disulfides in HEK 293 cells.
title_short The effect of oxidant and the non-oxidant alteration of cellular thiol concentration on the formation of protein mixed-disulfides in HEK 293 cells.
title_full The effect of oxidant and the non-oxidant alteration of cellular thiol concentration on the formation of protein mixed-disulfides in HEK 293 cells.
title_fullStr The effect of oxidant and the non-oxidant alteration of cellular thiol concentration on the formation of protein mixed-disulfides in HEK 293 cells.
title_full_unstemmed The effect of oxidant and the non-oxidant alteration of cellular thiol concentration on the formation of protein mixed-disulfides in HEK 293 cells.
title_sort effect of oxidant and the non-oxidant alteration of cellular thiol concentration on the formation of protein mixed-disulfides in hek 293 cells.
publisher Public Library of Science (PLoS)
publishDate 2008
url https://doaj.org/article/b16eac69d54e4fbf9eb3347fafc7204a
work_keys_str_mv AT jasenleegilge theeffectofoxidantandthenonoxidantalterationofcellularthiolconcentrationontheformationofproteinmixeddisulfidesinhek293cells
AT michaelfisher theeffectofoxidantandthenonoxidantalterationofcellularthiolconcentrationontheformationofproteinmixeddisulfidesinhek293cells
AT yuhcherngchai theeffectofoxidantandthenonoxidantalterationofcellularthiolconcentrationontheformationofproteinmixeddisulfidesinhek293cells
AT jasenleegilge effectofoxidantandthenonoxidantalterationofcellularthiolconcentrationontheformationofproteinmixeddisulfidesinhek293cells
AT michaelfisher effectofoxidantandthenonoxidantalterationofcellularthiolconcentrationontheformationofproteinmixeddisulfidesinhek293cells
AT yuhcherngchai effectofoxidantandthenonoxidantalterationofcellularthiolconcentrationontheformationofproteinmixeddisulfidesinhek293cells
_version_ 1718413945358778368