The actions of Ang II are mediated by angiotensin receptors, AT and AT. These receptors are members of the G protein-coupled receptors family which are seven transmembrane helices, connected by interchanging extracellular and intracellular loops.
Each G protein-coupled receptor couples to a specific G-protein which leads to activation of a special effector system. AT receptors are for instance primarily coupled through the G group of G-proteins. <br />
Two more angiotensin receptors have been described, AT and AT, but their role is still unknown.