Reactome: A Curated Pathway Database
Results 1 to 10 of 15
Pathways (7) Reactions (4) Proteins (1) Others (3)
Protein: UniProt:Q02643 GHRHR (Homo sapiens)
Last changed: 2015-03-10 08:59:22

Pathway: Signal Transduction (Homo sapiens)
Signal transduction is a process in which extracellular signals elicit changes in cell state and activity. Transmembrane receptors sense changes in the cellular environment by binding ligands, such as hormones and growth factors, or reacting to other types of stimuli, such as light. Stimulation of transmembrane receptors leads to their conformational change which propagates the signal to the intracellu
Last changed: 2015-03-06 23:15:47

Pathway: GPCR downstream signaling (Homo sapiens)
G protein-coupled receptors (GPCRs) are classically defined as the receptor, G-protein and downstream effectors, the alpha subunit of the G-protein being the primary signaling molecule. However, it has become clear that this greatly oversimplifies the complexities of GPCR signaling (see Gurevich & Gurevich, 2008). The beta:gamma G-protein dimer is also involved in downstream signaling (Smrcka, 2008), a
Last changed: 2015-03-06 23:15:47

Pathway: GPCR ligand binding (Homo sapiens)
There are more than 800 G-protein coupled receptor (GPCRs) in the human genome, making it the largest receptor superfamily. GPCRs are also the largest class of drug targets, involved in virtually all physiological processes (Frederiksson 2003). GPCRs are receptors for a diverse range of ligands from large proteins to photons (Kristiansen et al. 2004) and have an equal diversity of ligand-binding mechan
Last changed: 2015-03-06 18:40:03

Pathway: Signaling by GPCR (Homo sapiens)
G protein-coupled receptors (GPCRs; 7TM receptors; seven transmembrane domain receptors; heptahelical receptors; G protein-linked receptors [GPLR]) are the largest family of transmembrane receptors in humans, accounting for more than 1% of the protein-coding capacity of the human genome. All known GPCRs share a common architecture of seven membrane-spanning helices connected by intra- and extracellular
Last changed: 2015-03-06 23:15:47

Pathway: Class B/2 (Secretin family receptors) (Homo sapiens)
This family is known as Family B (secretin-receptor family, family 2) G-protein-coupled receptors. Family B GPCRs include secretin, calcitonin, parathyroid hormone/parathyroid hormone-related peptides and vasoactive intestinal peptide receptors; all of which activate adenylyl cyclase and the phosphatidyl-inositol-calcium pathway (Harmar AJ, 2001)
Last changed: 2015-03-06 18:40:03

Pathway: Glucagon-type ligand receptors (Homo sapiens)
The glucagon hormone family regulates the activity of GPCRs from the secretin receptor subfamily in Class II/B (Mayo KE et al, 2003)
Last changed: 2015-03-06 10:40:16

Pathway: G alpha (s) signalling events (Homo sapiens)
The general function of the G alpha (s) subunit (Gs) is to activate adenylate cyclase, which in turn produces cAMP, leading to the activation of cAMP-dependent protein kinases (often referred to collectively as Protein Kinase A). The signal from the ligand-stimulated GPCR is amplified because the receptor can activate several Gs heterotrimers before it is inactivated
Last changed: 2015-03-06 18:40:03

Reaction: GHRH receptor binds GHRH (Homo sapiens)
Growth hormone-releasing hormone (GHRH, somatocrinin, growth hormone-releasing factor) (Gubler U et al, 1983) is released from neurosecretory cells in the hypothalamus and along with the inhibitory peptide, somatostatin, mediates the neuroendocrine regulation of pituitary growth hormone synthesis and secretion. The GHRH receptor (Gaylinn BD et al, 1993) is expressed in the pituitary gland and mediates
Last changed: 2015-03-06 00:07:54

Reaction: The Ligand:GPCR:Gs complex dissociates (Homo sapiens)
The classical view of G-protein signalling is that the G-protein alpha subunit dissociates from the beta:gamma dimer. Activated G alpha (s) and the beta:gamma dimer then participate in separate signaling cascades. Although G protein dissociation has been contested (e.g. Bassi et al. 1996), recent in vivo experiments have demonstrated that dissociation does occur, though possibly not to completion (Lamb
Last changed: 2015-03-06 10:40:16

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