When people say that something really gets my goat,â they mean that they are extremely irritated. A wide variety of things could contribute to irritation, ranging from someone else's actions to a series of events, but, despite the turn of phrase, goats are not usually involved.
The major activator of Rho family GTPase is GPCR (G-Protein coupled Receptor). GPCRs that activate Rho and use G-Alpha12 or G-Alpha13 for signal transduction include receptors for LPA (Lysophosphatidic Acid) and S-1P (Sphingosine 1-Phosphate) and certain Hormones. Besides GPCR, Itgs (Integrins) also activate Rho GTPase.
Structural Biochemistry/Cell Signaling Pathways/G-Proteins and G-Protein Coupled Receptors - G-Proteins and G-Protein Coupled Receptors. 1  G-Protein coupled receptors (GPCRs) are a group of seven transmembrane proteins which bind signal molecules outside the cell, transduct the signal into the cell and finally cause a cellular response. The GPCRs work with the help of a G-Protein which binds to the energy rich GTP. Also known as heptahelical receptors, serpentine receptors, and G protein-linked receptors. These proteins make up transmembrane receptors whose purpose is to find molecules on the outside of the cell and initiate the signal transduction pathways.