Cited by 172Metabolism, Diabetes, and CancerProtein Kinase Regulation and GTPase SignalingNitric Oxide and Endothelin Effects

Activation of Protein Kinase Cζ by Peroxynitrite Regulates LKB1-dependent AMP-activated Protein Kinase in Cultured Endothelial Cells

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Xie, Zhonglin, Dong, Yunzhou, Zhang, Miao, Cui, Mei-Zhen, Cohen, Richard A., Riek, Uwe, Neumann, Dietbert, Schlattner, Uwe +1 more·2006·Journal of Biological Chemistry

Abstract

We previously reported the phosphoinositide 3-kinase-dependent activation of the 5'-AMP-activated kinase (AMPK) by peroxynitrite (ONOO-) and hypoxia-reoxygenation in cultured endothelial cells. Here we show the molecular mechanism of activation of this pathway. Exposure of bovine aortic endothelial cells to ONOO- significantly increased the phosphorylation of both Thr172 of AMPK and Ser1179 of endothelial nitric-oxide synthase, a known downstream enzyme of AMPK. In addition, activation of AMPK by ONOO- was accompanied by increased phosphorylation of protein kinase Czeta (PKCzeta) (Thr410/403) and translocation of cytosolic PKCzeta into the membrane. Further, inhibition of PKCzeta abrogated ONOO- -induced AMPK-Thr172 phosphorylation as that of endothelial nitric-oxide synthase. Furthermore, overexpression of a constitutively active PKCzeta mutant enhanced the phosphorylation of AMPK-Thr172, suggesting that PKCzeta is upstream of AMPK activation. In contrast, ONOO- activated PKCzeta in LKB1-deficient HeLa-S3 but affected neither AMPK-Thr172 nor AMPK activity. These data suggest that LKB1 is required for PKCzeta-enhanced AMPK activation. In vitro, recombinant PKCzeta phosphorylated LKB1 at Ser428, resulting in phosphorylation of AMPK at Thr172. Further, direct mutation of Ser428 of LKB1 into alanine, like the kinase-inactive LKB1 mutant, abolished ONOO- -induced AMPK activation. In several cell types originating from human, rat, and mouse, inhibition of PKCzeta significantly attenuated the phosphorylation of both LKB1-Ser428 and AMPK-Thr172 that were enhanced by ONOO-. Taken together, we conclude that PKCzeta can regulate AMPK activity by increasing the Ser428 phosphorylation of LKB1, resulting in association of LKB1 with AMPK and consequent AMPK Thr172 phosphorylation by LKB1.

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  • AMPK is responsive to imbalanced redox status.

    “Recent lines of evidence have demonstrated AMPK responsiveness to imbalanced redox status, thus bringing new insights into the networks of redox-stimulated signals upstream of AMPK (Table 1) [42,43,44,45,46,47,48,49,50,51].”

    From AMPK, Mitochondrial Function, and Cardiovascular Disease (2020) · cites this paper as [49]

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  1. Kemp, B. E., Stapleton, D., Campbell, D. J., Chen, Z. P., Murthy, S., Walter, M., Gupta, A., Adams, J. J., Katsis, F., Van Denderen, B., Jennings, I. G., Iseli, T., Michell, B. J., and Witters, L. A. (2003) Biochem. Soc. Trans. 31, 162-168
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Authors
Xie, Z., Dong, Y., Zhang, M., Cui, M.-Z., Cohen, R. A., Riek, U., Neumann, D., Schlattner, U., & Zou, M.-H.
Affiliations
  • University of Oklahoma Health Sciences Center (US)
  • University of Tennessee at Knoxville (US)
  • Boston University (US)
  • ETH Zurich (CH)
Corresponding author
Zou, Ming-Hui
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2006-03
Volume
281
Issue
10
Pages
6366-6375
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2082472130
Cited by
172
References
52
Citations by year
2025: 1 · 2023: 1 · 2022: 5 · 2021: 5 · 2020: 9 · 2019: 3 · 2018: 7 · 2017: 7 · 2016: 2 · 2015: 13 · 2014: 12 · 2013: 10 · 2012: 14
FWCI
7.88
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • American Diabetes Association (HL080499, HL079584)
  • National Institutes of Health (HL68758)
  • National Heart, Lung, and Blood Institute (HL-07439, HL 079584, HL68758, R01HL079584, HL-080499, P01HL068758, R01HL080499, T32HL007439)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
Keywords
protein kinase C zeta, peroxynitrite, AMPK, LKB1, endothelial cells, endothelial nitric oxide synthase, Thr172 phosphorylation, hypoxia/reoxygenation, phosphatidylinositol 3-kinase, protein kinase signaling
MeSH terms
AMP-Activated Protein Kinase Kinases, Protein Kinase C zeta, Animals, Cattle, Cell Differentiation, Cell Survival, Cells, Cultured, Endothelium, Vascular, Energy Metabolism, Enzyme Activation, HeLa Cells, Humans, Multienzyme Complexes, Phosphorylation, Protein Kinase C, Protein Serine-Threonine Kinases, Peroxynitrous Acid, Cell Proliferation, Mice, Rats, Nitric Oxide Synthase Type III, AMP-Activated Protein Kinases

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