Enzyme-linked receptor

An enzyme-linked receptor is a transmembrane receptor, where the binding of an extracellular ligand causes enzymatic activity on the intracellular side.

Examples of the enzymatic activity include:
 * Receptor tyrosine kinase, as in fibroblast growth factor receptor. Most enzyme-linked receptors are of this type.
 * Serine/threonine-specific protein kinase, as in bone morphogenetic protein
 * Guanylate cyclase, as in atrial natriuretic factor receptor