AttenuationofGPCRSignaling
The G-protein coupled receptor (GPCR) family transduces extracellular signals across the plasma membrane, activating cellular responses through a variety of second messenger cascades (see PKA and PKC signaling pathways). These receptors provide rapid responses to a variety of stimuli, and are often rapidly attenuated in their signaling. Failure to attenuate GPCR signaling can have dramatic consequences. One method to......閱讀全文
Attenuation－of－GPCR－Signaling
The G-protein coupled receptor (GPCR) family transduces extracellular signals across the plasma membrane, activating cellular responses through a vari
Roles－of－arrestindependent－Recruitment－of－Src－Kinases－in－GPCR－Signaling
The binding of ?-arrestins to agonist-occupied GPCRs coincides with the recruitment of Src family tyrosine kinases, including c-Src, Hck and c-Fgr (Sr
arrestins－in－GPCR－Desensitization
Role of ?-arrestins in the desensitization, sequestration and intracellular trafficking of GPCRs. Homologous desensitization of GPCRs (1) results from
WNT－Signaling－Pathway
Wnt family members are secreted glycoproteins who bind to cell surface receptors such as Frizzled. Wnt members can play a role in the expression of ma
Ras－Signaling－Pathway
Ras activates many signaling cascades. Here we illustrate some of the well-characterized cascades in a generic compilation of effector molecules. The
AKT－Signaling－Pathway
Many cell-surface receptors induce production of second messengers like PIP3, phosphatidylinositol 3,4,5-trisphosphate, that convey signals to the cyt
mTOR－Signaling－Pathway
mTOR (mammalian target of rapamycin) appears to play a central role in signaling caused by nutrients and mitogens such as growth factors to regulate t
TPO－Signaling－Pathway
Thrombopoietin (TPO) binds to its receptor inducing aggregation and activation. TPO signals its growth regulating effects to the cell through several
ATM－Signaling－Pathway
The ataxia telangiectasia-mutated gene (ATM) encodes a protein kinase that acts as a tumor suppressor. ATM activation by ionizing radiation damage to
EGF－Signaling－Pathway
The epidermal growth factor (EGF) peptide induces cellular proliferation through the EGF receptor, which has a tyrosine kinase cytoplasmic domain, a s
PDGF－Signaling－Pathway
Platelet Derived Growth Factor (PDGF) plays a critical role in cellular proliferation and development. The biologically active form is a dimer formed
BCR－Signaling－Pathway
Significant progress has been made towards delineation of the intrinsic molecular processes that regulate B lymphocyte immune function. Recent observa
Insulin－Signaling－Pathway
The appropriate signaling through the insulin pathway is critical for the regulation of glucose levels and the avoidance of diabetes. Insulin forms a
Integrin－Signaling－Pathway
Integrins are cell surface receptors that interact with the extracellular matrix and mediate intracellular signals in response to the extracellular ma
EPO－Signaling－Pathway
Erythropoietin functions to increase the number of red blood cells. Thus, it has found utility as a drug for those needing to replenish erythrocytes f
Reelin－Signaling－Pathway
Reelin is an extracellular protein secreted by neurons. Reeler mice with a defective Reelin gene exhibit neuronal abnormalities in development. Mice t
MAPKinase－Signaling－Pathway
The ever evolving mitogen-activated protein kinase (MAP kinase) pathways consist of four major groupings and numerous related proteins which constitut
Ceramide－Signaling－Pathway
Over 1,000 papers and reviews have been written about the role of ceramide in the production of programmed cell death or apoptosis. Ceramide is a sphi
Activation－of－cAMPdependent－protein－kinase,－PKA
G-protein coupled receptors (GPCRs) are one of the largest gene families of signaling proteins. Residing in the plasma membrane with seven transmembra
IL－17－Signaling－Pathway
Inflammation is a complex response involving many different cells and signaling molecules, including the secretion of the cytokine IL-17 by activated
TGF－beta－signaling－pathway
TGF-beta regulates growth and proliferation of cells, blocking growth of many cell types. The TGF-beta receptor includes type 1 and type 2 subunits th
Phospholipase－C－Signaling－Pathway
Phospholipase C comes in multiple forms and plays a key role in the signal transduction process for many receptors. Its main function is to hydrolyze
IL－3－signaling－pathway
Interleukin-3 promotes the proliferation and differentiation of hematopoietic cells through binding to its receptor. The receptor for IL-3 is a hetero
IL－6－signaling－pathway
Interleukin-6 (IL-6) is a cytokine that provokes a broad range of cellular and physiological responses. In addition to playing a role in inflammation
Growth－Hormone－Signaling－Pathway
Growth hormone plays a major role in regulating growth during childhood and adolescence and also regulates metabolism. Defects in growth hormone signa
IL－5－Signaling－Pathway
IL-5 is an inflammatory signaling molecule that primarily stimulates eosinophil proliferation, maturation and activation. Eosinophils are leukocytes i
IL－2－signaling－pathway
Interleukin 2 (IL-2) is a potent cytokine that can lead to cellular activation and proliferation. IL-2 Receptors are found on activated B-Cells, LPS t
Trka－Receptor－Signaling－Pathway
Nerve growth factor (NGF) is a neurotrophic factor that stimulates neuronal survival and growth through TrkA, a member of the trk family of tyrosine k
Role－of－Mitochondria－in－Apoptotic－Signaling
Mitochondria participate in apoptotic signaling pathways through the release of mitochondrial proteins into the cytoplasm. Cytochrome c, a key protein
IFN－alpha－signaling－pathway
Interferon alpha plays a role in viral infections. Signaling takes place through an IFN Recpetor complex consisting of two alpha chains (Type I recept