Inhibition of Apoptosis Signal-regulating Kinase 1 by Nitric Oxide through a Thiol Redox Mechanism

Hee Sae Park, Je Wook Yu, Jun Ho Cho, Mi Sung Kim, Sung-Ho Huh, Kanghyun Ryoo, Eui Ju Choi

Research output: Contribution to journalArticle

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Abstract

Nitric oxide is an endogenous thiol-reactive molecule that modulates the functions of many regulatory proteins by a thiol-redox mechanism. NO has now been shown to inhibit the activation of apoptosis signal-regulating kinase 1 (ASK1) in murine fibrosarcoma L929 cells through such a mechanism. Exposure of L929 cells to interferon-γ resulted in the endogenous production of NO and in inhibition of the activation of ASK1 by hydrogen peroxide. The interferon-γ-induced inhibition of ASK1 activity was blocked by N G -nitro-L-arginine, an inhibitor of NO synthase. Furthermore, the NO donor S-nitro-N-acetyl-DL-penicillamine (SNAP) inhibited ASK1 activity in vitro, and this inhibition was reversed by thiol-reducing agents such as dithiothreitol and β-mercaptoethanol. SNAP did not inhibit the kinase activities of MKK3, MKK6, or p38 in vitro. The inhibition of ASK1 by interferon-γ was not changed by 1H- (1,2,4)oxadiazolo[4,3-α ]quinoxalin-1-one, an inhibitor of guanylyl cyclase nor was it mimicked by 8-bromo-cyclic GMP. Site-directed mutagenesis revealed that replacement of cysteine 869 of ASK1 by serine rendered this protein resistant to the inhibitory effects both of interferon-γ in intact cells and of SNAP in vitro. Coimmunoprecipitation data showed that NO production inhibited a binding of ASK1, but not ASK1(C869S), to MKK3 or MKK6. Moreover, interferon-γ induced the S-nitrosylation of endogenous ASK1 in L929 cells. Together, these results suggest that NO mediates the interferon-γ-induced inhibition of ASK1 in L929 cells through a thiol-redox mechanism.

Original languageEnglish (US)
Pages (from-to)7584-7590
Number of pages7
JournalJournal of Biological Chemistry
Volume279
Issue number9
DOIs
StatePublished - Feb 27 2004

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MAP Kinase Kinase Kinase 5
Sulfhydryl Compounds
Oxidation-Reduction
Nitric Oxide
Interferons
Penicillamine
Chemical activation
Quinoxalines
Mutagenesis
Mercaptoethanol
Fibrosarcoma
Guanylate Cyclase
Dithiothreitol
Reducing Agents
Site-Directed Mutagenesis
Nitric Oxide Synthase
Serine
Hydrogen Peroxide
Cysteine
Arginine

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Inhibition of Apoptosis Signal-regulating Kinase 1 by Nitric Oxide through a Thiol Redox Mechanism. / Park, Hee Sae; Yu, Je Wook; Cho, Jun Ho; Kim, Mi Sung; Huh, Sung-Ho; Ryoo, Kanghyun; Choi, Eui Ju.

In: Journal of Biological Chemistry, Vol. 279, No. 9, 27.02.2004, p. 7584-7590.

Research output: Contribution to journalArticle

Park, Hee Sae ; Yu, Je Wook ; Cho, Jun Ho ; Kim, Mi Sung ; Huh, Sung-Ho ; Ryoo, Kanghyun ; Choi, Eui Ju. / Inhibition of Apoptosis Signal-regulating Kinase 1 by Nitric Oxide through a Thiol Redox Mechanism. In: Journal of Biological Chemistry. 2004 ; Vol. 279, No. 9. pp. 7584-7590.
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abstract = "Nitric oxide is an endogenous thiol-reactive molecule that modulates the functions of many regulatory proteins by a thiol-redox mechanism. NO has now been shown to inhibit the activation of apoptosis signal-regulating kinase 1 (ASK1) in murine fibrosarcoma L929 cells through such a mechanism. Exposure of L929 cells to interferon-γ resulted in the endogenous production of NO and in inhibition of the activation of ASK1 by hydrogen peroxide. The interferon-γ-induced inhibition of ASK1 activity was blocked by N G -nitro-L-arginine, an inhibitor of NO synthase. Furthermore, the NO donor S-nitro-N-acetyl-DL-penicillamine (SNAP) inhibited ASK1 activity in vitro, and this inhibition was reversed by thiol-reducing agents such as dithiothreitol and β-mercaptoethanol. SNAP did not inhibit the kinase activities of MKK3, MKK6, or p38 in vitro. The inhibition of ASK1 by interferon-γ was not changed by 1H- (1,2,4)oxadiazolo[4,3-α ]quinoxalin-1-one, an inhibitor of guanylyl cyclase nor was it mimicked by 8-bromo-cyclic GMP. Site-directed mutagenesis revealed that replacement of cysteine 869 of ASK1 by serine rendered this protein resistant to the inhibitory effects both of interferon-γ in intact cells and of SNAP in vitro. Coimmunoprecipitation data showed that NO production inhibited a binding of ASK1, but not ASK1(C869S), to MKK3 or MKK6. Moreover, interferon-γ induced the S-nitrosylation of endogenous ASK1 in L929 cells. Together, these results suggest that NO mediates the interferon-γ-induced inhibition of ASK1 in L929 cells through a thiol-redox mechanism.",
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AB - Nitric oxide is an endogenous thiol-reactive molecule that modulates the functions of many regulatory proteins by a thiol-redox mechanism. NO has now been shown to inhibit the activation of apoptosis signal-regulating kinase 1 (ASK1) in murine fibrosarcoma L929 cells through such a mechanism. Exposure of L929 cells to interferon-γ resulted in the endogenous production of NO and in inhibition of the activation of ASK1 by hydrogen peroxide. The interferon-γ-induced inhibition of ASK1 activity was blocked by N G -nitro-L-arginine, an inhibitor of NO synthase. Furthermore, the NO donor S-nitro-N-acetyl-DL-penicillamine (SNAP) inhibited ASK1 activity in vitro, and this inhibition was reversed by thiol-reducing agents such as dithiothreitol and β-mercaptoethanol. SNAP did not inhibit the kinase activities of MKK3, MKK6, or p38 in vitro. The inhibition of ASK1 by interferon-γ was not changed by 1H- (1,2,4)oxadiazolo[4,3-α ]quinoxalin-1-one, an inhibitor of guanylyl cyclase nor was it mimicked by 8-bromo-cyclic GMP. Site-directed mutagenesis revealed that replacement of cysteine 869 of ASK1 by serine rendered this protein resistant to the inhibitory effects both of interferon-γ in intact cells and of SNAP in vitro. Coimmunoprecipitation data showed that NO production inhibited a binding of ASK1, but not ASK1(C869S), to MKK3 or MKK6. Moreover, interferon-γ induced the S-nitrosylation of endogenous ASK1 in L929 cells. Together, these results suggest that NO mediates the interferon-γ-induced inhibition of ASK1 in L929 cells through a thiol-redox mechanism.

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