Role of 90-kDa Heat Shock Protein (Hsp 90) and Protein Degradation in Regulating Neuronal Levels of G Protein-Coupled Receptor Kinase 3

@article{Salim2007RoleO9,
  title={Role of 90-kDa Heat Shock Protein (Hsp 90) and Protein Degradation in Regulating Neuronal Levels of G Protein-Coupled Receptor Kinase 3},
  author={S. Salim and Douglas C. Eikenburg},
  journal={Journal of Pharmacology and Experimental Therapeutics},
  year={2007},
  volume={320},
  pages={1106 - 1112}
}
Cellular levels of G protein-coupled receptor kinase (GRK)3 determine the sensitivity of the α2A/B-adrenoceptor (α2-AR) to agonist-induced down-regulation. Using human neuroblastoma BE(2)-C cells, this study examines how cellular GRK3 levels are affected by several mechanisms reported to influence stability and degradation of other GRKs. We first examined the interaction between the 90-kDa heat shock protein (Hsp90) and GRK3; Hsp90 reportedly affects the maturation and stability of GRK2. In… 

Figures from this paper

The Role of Heat Shock Proteins in Regulating Receptor Signal Transduction
TLDR
Overall, Hsps are important regulators of receptor signaling that are receiving increasing interest and exploration, particularly as Hsp90 inhibitors progress toward clinical approval for the treatment of cancer.
Role of Heat Shock Protein 90 in Regulating Downstream Signal Transduction Cascades
TLDR
This chapter will discuss the main themes of signaling protein regulation by Hsp90, and highlight several crucial signaling protein families, and suggest means to manipulate these regulatory relationships to improve clinical therapy, and future directions for the field of HSp90 signaling regulation.
The Potential of Hsp90 in Targeting Pathological Pathways in Cardiac Diseases
TLDR
This review aims to address how Hsp90 functions, where HSp90 interacts within pathological pathways, and current knowledge of small molecules and PTMs known to modulate H Sp90 activity and their potential as therapeutics in cardiac diseases.
Prodeath Signaling of G Protein–Coupled Receptor Kinase 2 in Cardiac Myocytes After Ischemic Stress Occurs Via Extracellular Signal–Regulated Kinase-Dependent Heat Shock Protein 90–Mediated Mitochondrial Targeting
TLDR
G protein–coupled receptor kinase 2 is identified as a prodeath kinase in the heart, acting in a novel manner through mitochondrial localization via extracellular signal–regulated kinase regulation.
Targeted Ubiquitination and Degradation of G-Protein-Coupled Receptor Kinase 5 by the DDB1-CUL4 Ubiquitin Ligase Complex
TLDR
This study identifies potentialGRK5 interacting proteins, and reveals the association of GRK5 with DDB1 in cell and the regulation of GRk5 level by DDB 1-CUL4 ubiquitin ligase complex–dependent proteolysis pathway.
Heat Shock Proteins: Cellular and molecular mechanisms in the CNS
TLDR
A three-part discussion on the array of HSPs families relevant to neuronal tissue, their cellular functions, and the exploration of therapeutic targets of these proteins in the context of neurological diseases.
...
1
2
...

References

SHOWING 1-10 OF 31 REFERENCES
G Protein-coupled Receptor Kinase Interaction with Hsp90 Mediates Kinase Maturation*
TLDR
Additional GRKs were studied by transient expression in COS-1 cells and subsequent treatment with geldanamycin and it is demonstrated that GRK3, GRK5, and GRK6 are also stabilized by interaction with Hsp90.
Oxidative stress decreases G protein-coupled receptor kinase 2 in lymphocytes via a calpain-dependent mechanism.
TLDR
It is demonstrated herein that oxidative stress, induced by exposure of lymphocytes to H(2)O(2), results in a 50% reduction in GRK2 protein levels and GRK activity with no changes in mRNA expression, and oxidative stress may change the functioning of GPCRs via calpain-dependent regulation ofGRK2 levels.
Cellular G Protein-Coupled Receptor Kinase Levels Regulate Sensitivity of the α2B-Adrenergic Receptor to Undergo Agonist-Induced Down-Regulation
TLDR
This is the first report to systematically demonstrate that GRKs, particularly GRK3, play a pivotal role in modulating the agonist EC50 concentration that down-regulates the α2B-AR and thus adds a new dimension to an already intricate signaling network.
Degradation of the G Protein-coupled Receptor Kinase 2 by the Proteasome Pathway*
TLDR
It is shown that GRK2 is actively degraded by the proteasome proteolytic pathway, unveiling a new mechanism for the rapid regulation of its expression levels and revealing an important mechanism for modulating the cellular response to agonists acting through G protein-coupled receptors.
Extracellular Signal-Regulated Kinase 1/2-Mediated Transcriptional Regulation of G-Protein-Coupled Receptor Kinase 3 Expression in Neuronal Cells
TLDR
The involvement of the ERK1/2 pathway in selective up-regulation of GRK3 mRNA expression is demonstrated, possibly via activation of Sp-1 and Ap-2 transcription factors in neuronal cells.
Regulation of Signaling Protein Function and Trafficking by the hsp90/hsp70-Based Chaperone Machinery 1
TLDR
This purified system of five purified proteins should facilitate understanding of how eukaryotlc hsp70 and hsp90 work together as essential components of a process that alters the conformations of substrate proteins to states that respond in signal transduction.
GRK3 mediates desensitization of CRF1 receptors: a potential mechanism regulating stress adaptation.
TLDR
It is concluded that GRK3 contributes importantly to the homologous desensitization of CRF1 receptors in Y-79 cells, a brain-derived cell line.
Regulation of G protein-coupled receptor kinases.
...
1
2
3
4
...