» Articles » PMID: 17709378

Phosphorylation of TPL-2 on Serine 400 is Essential for Lipopolysaccharide Activation of Extracellular Signal-regulated Kinase in Macrophages

Overview
Journal Mol Cell Biol
Specialty Cell Biology
Date 2007 Aug 22
PMID 17709378
Citations 25
Authors
Affiliations
Soon will be listed here.
Abstract

Tumor progression locus 2 (TPL-2) kinase is essential for Toll-like receptor 4 activation of the mitogen-activated protein kinase extracellular signal-regulated kinase (ERK) and for upregulation of the inflammatory cytokine tumor necrosis factor (TNF) in lipopolysaccharide (LPS)-stimulated macrophages. LPS activation of ERK requires TPL-2 release from associated NF-kappaB1 p105, which blocks TPL-2 access to its substrate, the ERK kinase MEK. Here we demonstrate that TPL-2 activity is also regulated independently of p105, since LPS stimulation was still needed for TPL-2-dependent activation of ERK in Nfkb1(-/-) macrophages. In wild-type macrophages, LPS induced the rapid phosphorylation of serine (S) 400 in the TPL-2 C-terminal tail. Mutation of this conserved residue to alanine (A) blocked the ability of retrovirally expressed TPL-2 to induce the activation of ERK in LPS-stimulated Nfkb1(-/-) macrophages. TPL-2(S400A) expression also failed to reconstitute LPS activation of ERK and induction of TNF in Map3k8(-/-) macrophages, which lack endogenous TPL-2. Consistently, the S400A mutation was found to block LPS stimulation of TPL-2 MEK kinase activity. Thus, induction of TPL-2 MEK kinase activity by LPS stimulation of macrophages requires TPL-2 phosphorylation on S400, in addition to its release from NF-kappaB1 p105. Oncogenic C-terminal truncations of TPL-2 that remove S400 could promote its transforming potential by eliminating this critical control step.

Citing Articles

Whole-Transcriptome Analysis Highlights Adenylyl Cyclase Toxins-Derived Modulation of NF-κB and ERK1/2 Pathways in Macrophages.

Zhao T, Li R, Qian M, Wang M, Zhang X, Wang Y Toxins (Basel). 2023; 15(2).

PMID: 36828453 PMC: 9967024. DOI: 10.3390/toxins15020139.


IKBKE-driven TPL2 and MEK1 phosphorylations sustain constitutive ERK1/2 activation in tumor cells.

Goktuna S EXCLI J. 2022; 21:436-453.

PMID: 35391917 PMC: 8983855. DOI: 10.17179/excli2021-4578.


Cell adhesion tunes inflammatory TPL2 kinase signal transduction.

Vougioukalaki M, Georgila K, Athanasiadis E, Eliopoulos A Cell Mol Life Sci. 2022; 79(3):156.

PMID: 35218437 PMC: 11072766. DOI: 10.1007/s00018-022-04130-7.


Tpl2 Ablation Leads to Hypercytokinemia and Excessive Cellular Infiltration to the Lungs During Late Stages of Influenza Infection.

Latha K, Jamison K, Watford W Front Immunol. 2021; 12:738490.

PMID: 34691044 PMC: 8529111. DOI: 10.3389/fimmu.2021.738490.


Foot-and-Mouth Disease Virus Capsid Protein VP1 Antagonizes TPL2-Mediated Activation of the IRF3/IFN-β Signaling Pathway to Facilitate the Virus Replication.

Hao J, Shen C, Wei N, Yan M, Zhang X, Xu G Front Immunol. 2021; 11:580334.

PMID: 33488582 PMC: 7821752. DOI: 10.3389/fimmu.2020.580334.


References
1.
Chiariello M, Marinissen M, Gutkind J . Multiple mitogen-activated protein kinase signaling pathways connect the cot oncoprotein to the c-jun promoter and to cellular transformation. Mol Cell Biol. 2000; 20(5):1747-58. PMC: 85357. DOI: 10.1128/MCB.20.5.1747-1758.2000. View

2.
Papoutsopoulou S, Symons A, Tharmalingham T, Belich M, Kaiser F, Kioussis D . ABIN-2 is required for optimal activation of Erk MAP kinase in innate immune responses. Nat Immunol. 2006; 7(6):606-15. DOI: 10.1038/ni1334. View

3.
Karin M, Ben-Neriah Y . Phosphorylation meets ubiquitination: the control of NF-[kappa]B activity. Annu Rev Immunol. 2000; 18:621-63. DOI: 10.1146/annurev.immunol.18.1.621. View

4.
Morita S, Kojima T, Kitamura T . Plat-E: an efficient and stable system for transient packaging of retroviruses. Gene Ther. 2000; 7(12):1063-6. DOI: 10.1038/sj.gt.3301206. View

5.
Dumitru C, Ceci J, Tsatsanis C, Kontoyiannis D, Stamatakis K, Lin J . TNF-alpha induction by LPS is regulated posttranscriptionally via a Tpl2/ERK-dependent pathway. Cell. 2001; 103(7):1071-83. DOI: 10.1016/s0092-8674(00)00210-5. View