Receptor Recognition and Structure
Oxytocin binds the oxytocin receptor (OTR), a member of the oxytocin/vasopressin family of class A G protein-coupled receptors. A 2022 cryo-EM structure of the human oxytocin receptor showed that all nine oxytocin residues participate in receptor binding. The cyclic portion formed by residues 1–6 sits deeper in the orthosteric pocket, while residues 7–9 extend toward the extracellular loops.



