J Biol Chem 1999,
PMID: 10329710
Yamashita, H; Avraham, S; Jiang, S; Dikic, I; Avraham, H
Csk homologous kinase (CHK), a member of the Csk regulatory tyrosine kinase family, is expressed primarily in brain and hematopoietic cells. The role of CHK in the nervous system is as yet unknown. Using PC12 cells as a model system of neuronal cells, we show that CHK participates in signaling mediated by TrkA receptors. CHK was found to be associated with tyrosine-phosphorylated TrkA receptors in PC12 cells upon stimulation with NGF. Binding assays and far Western blotting analysis, using glutathione S-transferase fusion proteins containing the Src homology 2 (SH2) and SH3 domains of CHK, demonstrate that the SH2 domain of CHK binds directly to the tyrosine-phosphorylated TrkA receptors. Site-directed mutagenesis of TrkA cDNA, as well as phosphopeptide inhibition of the in vitro interaction of the CHK-SH2 domain or native CHK with TrkA receptors, indicated that the residue Tyr-785 on TrkA is required for its binding to the CHK-SH2 domain upon NGF stimulation. In addition, overexpression of CHK resulted in enhanced activation of the mitogen-activated protein kinase pathway upon NGF stimulation, and microinjection of anti-CHK antibodies, but not anti-Csk antibodies, inhibited neurite outgrowth of PC12 cells in response to NGF. Thus, CHK is a novel signaling molecule that participates in TrkA signaling, associates directly with TrkA receptors upon NGF stimulation, and is involved in neurite outgrowth of PC12 cells in response to NGF.
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Text Mining Data
CHK ⊣ TrkA: "
Site directed mutagenesis of
TrkA cDNA, as well as phosphopeptide
inhibition of the in vitro interaction of the CHK-SH2 domain or native
CHK with TrkA receptors, indicated that the residue Tyr-785 on TrkA is required for its binding to the CHK-SH2 domain upon NGF stimulation
"
CHK-SH2 → Tyr-785: "
Site directed mutagenesis of TrkA cDNA, as well as phosphopeptide inhibition of the in vitro interaction of the CHK-SH2 domain or native CHK with TrkA receptors, indicated that the residue Tyr-785 on TrkA is required for its binding to the CHK-SH2 domain upon NGF stimulation
"
Manually curated Databases
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IRef Biogrid Interaction:
NTRK1
—
MATK
(physical association, affinity chromatography technology)
-
IRef Biogrid Interaction:
NTRK1
—
MATK
(direct interaction, far western blotting)
-
IRef Hprd Interaction:
MATK
—
NTRK1
(in vivo)
-
NCI Pathway Database Neurotrophic factor-mediated Trk receptor signaling:
Erk1-2 (MAPK3/MAPK1)
→
Erk1-2-active (MAPK3/MAPK1)
(modification, collaborate)
Evidence: mutant phenotype, assay, other species
-
NCI Pathway Database Neurotrophic factor-mediated Trk receptor signaling:
Erk1-2 (MAPK3/MAPK1)
→
NGF (dimer)/TRKA/MATK complex (NTRK1-NGF-MATK)
(modification, collaborate)
Evidence: mutant phenotype, assay, other species
-
NCI Pathway Database Neurotrophic factor-mediated Trk receptor signaling:
NGF (dimer)/TRKA complex (NTRK1-NGF)
→
NGF (dimer)/TRKA/MATK complex (NTRK1-NGF-MATK)
(modification, collaborate)
Evidence: mutant phenotype, physical interaction, other species
-
NCI Pathway Database Neurotrophic factor-mediated Trk receptor signaling:
NGF (dimer)/TRKA complex (NTRK1-NGF)
→
MATK (MATK)
(modification, collaborate)
Evidence: mutant phenotype, physical interaction, other species
-
NCI Pathway Database Neurotrophic factor-mediated Trk receptor signaling:
NGF (dimer)/TRKA/MATK complex (NTRK1-NGF-MATK)
→
MATK (MATK)
(modification, collaborate)
Evidence: mutant phenotype, physical interaction, other species
In total, 15 gene pairs are associated to this article in curated databases