Sandbox Reserved 1723: Difference between revisions

MRGPRX2 mediates degranulation of mast cells through interaction with Gq and Gi subunits. Gq activation signals through [https://en.wikipedia.org/wiki/Phospholipase_C Phospholipase C], which catalyzes the cleavage of Phosphatidylinositol bisphosphate into [https://en.wikipedia.org/wiki/Diglyceride diacylglycerol (DAG)] and [https://en.wikipedia.org/wiki/Inositol_trisphosphate inositol trisphosphate (IP3)]. DAG is then able to increase the activity of [https://en.wikipedia.org/wiki/Protein_kinase_C protein kinase C]. IP3 receptor is ligand gated calcium channel on the endoplasmic reticulum (ER), that causes the release of calcium in cytoplasm. Subsequently, this results in muscle contraction and vasodilation <ref name="Ramesh">Ramesh, Soliman, et al. (2015) "G-Protein Coupled Receptors (GPCRs): A Comprehensive Computational Perspective." Combinational Chemistry and High Throughout Screening, 18(4), 346-364, https://pubmed.ncbi.nlm.nih.gov/25747435/</ref>. MRGPRX2 also interacts with Gi or G-protein inhibitory, which is structurally homologous to Gs (G-protein stimulatory) and will inhibit adenylyl cyclase, lowering cAMP and ATP concentrations <ref name="Ramesh">Ramesh, Soliman, et al. (2015) "G-Protein Coupled Receptors (GPCRs): A Comprehensive Computational Perspective." Combinational Chemistry and High Throughout Screening, 18(4), 346-364, https://pubmed.ncbi.nlm.nih.gov/25747435/</ref>. Gi is stimulated when [https://en.wikipedia.org/wiki/Somatostatin somatostatin] binds to receptor in pancreas. These signals will propogate throughout the body and intiate the sensation of itching, hypersensitivity, and anaphylaxis.