Cited by 438NF-κB Signaling PathwaysGenomics and Chromatin DynamicsSignaling Pathways in Disease

NF-κB RelA Phosphorylation Regulates RelA Acetylation

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Chen, Lin-Feng, Williams, Samuel A., Mu, Yajun, Nakano, Hiroyasu, Duerr, James M., Buckbinder, Leonard, Greene, Warner C.·2005·Molecular and Cellular Biology

Abstract

The nuclear functions of NF-kappaB p50/RelA heterodimers are regulated in part by posttranslational modifications of its RelA subunit, including phosphorylation and acetylation. Acetylation at lysines 218, 221, and 310 differentially regulates RelA's DNA binding activity, assembly with IkappaBalpha, and transcriptional activity. However, it remains unclear whether the acetylation is regulated or simply due to stimulus-coupled nuclear translocation of NF-kappaB. Using anti-acetylated lysine 310 RelA antibodies, we detected p300-mediated acetylation of RelA in vitro and in vivo after stimulation of cells with tumor necrosis factor alpha (TNF-alpha). Coexpression of catalytically inactive mutants of the catalytic subunit of protein kinase A/mitogen- and stress-activated kinase 1 or IKK1/IKK2, which phosphorylate RelA on serine 276 or serine 536, respectively, sharply inhibited RelA acetylation on lysine 310. Furthermore, phosphorylation of RelA on serine 276 or serine 536 increased assembly of phospho-RelA with p300, which enhanced acetylation on lysine 310. Reconstitution of RelA-deficient murine embryonic fibroblasts with RelA S276A or RelA S536A decreased TNF-alpha-induced acetylation of lysine 310 and expression of the endogenous NF-kappaB-responsive E-selectin gene. These findings indicate that the acetylation of RelA at lysine 310 is importantly regulated by prior phosphorylation of serines 276 and 536. Such phosphorylated and acetylated forms of RelA display enhanced transcriptional activity.

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Crossref · 10.1128/mcb.25.18.7966-7975.2005

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  • Inflammatory signals such as LPS, pro-inflammatory cytokines, reactive oxygen species, advanced glycation end products, and oxidized LDL cause IKKβ phosphorylation; this phosphorylates IκBα, leading to its ubiquitination and degradation, which releases NF-κB to enter the nucleus and induce pro-inflammatory genes.

    “Extracellular inflammatory signals including lipopolysaccharide (LPS), pro-inflammatory cytokines, reactive oxygen species, advanced glycation end products, and oxidized low-density lipoprotein trigger the phosphorylation of IKKβ, which in turn phosphorylates IκBα for ubiquitination and degradation by proteasome [13–18].”

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Authors
Chen, L.-F., Williams, S. A., Mu, Y., Nakano, H., Duerr, J. M., Buckbinder, L., & Greene, W. C.
Affiliations
  • Gladstone Institutes (US)
  • Juntendo University (JP)
  • Pfizer (United States) (US)
Corresponding author
  • Chen, Lin-Feng
  • Greene, Warner C.
Venue
Molecular and Cellular Biology
Published
2005-09-01
Volume
25
Issue
18
Pages
7966-7975
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2117817795
Cited by
438
References
36
Citations by year
2026: 10 · 2025: 8 · 2024: 13 · 2023: 12 · 2022: 11 · 2021: 24 · 2020: 25 · 2019: 14 · 2018: 24 · 2017: 22 · 2016: 19 · 2015: 15 · 2014: 25 · 2013: 29 · 2012: 34
FWCI
7.32
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Foundation for the National Institutes of Health
  • Arthritis Foundation
  • Pfizer
  • Gladstone Institutes
  • Center for AIDS Research, University of Washington
  • University of California, San Francisco
  • National Institute of Mental Health (P30MH059037, P30-MH 59037)
  • National Cancer Institute (R01CA089001, R01 CA89001-02)
  • National Institute of Allergy and Infectious Diseases (AI07305)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
Keywords
p65 phosphorylation, P300, protein kinase A, TNF-α, E-selectin, transcriptional activity, post-translational modification, embryonic fibroblasts
MeSH terms
Acetylation, Animals, Cells, Cultured, Humans, Lysine, Mutation, Nuclear Proteins, Phosphorylation, Serine, Transcription, Genetic, Trans-Activators, NF-kappa B, E1A-Associated p300 Protein, Mice, Transcription Factor RelA

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