Ligand-receptor binding

Ligand-receptor binding is the fundamental biochemical process where a signaling molecule, known as a ligand, interacts with a specific site on a target protein called a receptor to initiate a physiological response [1]. This interaction is governed by principles of molecular recognition, where the specificity and strength (affinity) of the bond are determined by non-covalent forces such as hydrogen bonding, ionic interactions, and van der Waals forces [2]. While this process is the mechanism through which the vast majority of therapeutic drugs exert their effects, the term itself refers to a general phenomenon rather than a specific, druggable protein or enzyme [3]. In pharmacology, the study of ligand-receptor binding is essential for determining drug potency, efficacy, and the dose-response relationship [4]. Because the term encompasses virtually all aspects of cell signaling and drug action across every therapeutic area, it is not considered a distinct therapeutic target in drug development [5]. Sources: [1] StatPearls, "Pharmacodynamics" (https://www.ncbi.nlm.nih.gov/books/NBK507791/) [2] Alberts B, et al. "Molecular Biology of the Cell," General Principles of Cell Signaling (https://www.ncbi.nlm.nih.gov/books/NBK26813/) [3] IUPAC, "Glossary of terms used in medicinal chemistry" (https://goldbook.iupac.org/terms/view/L03517) [4] Nature Education, "Cell Signaling" (https://www.nature.com/scitable/topicpage/cell-signaling-14050733/) [5] Kenakin T. "A Pharmacology Primer: Techniques for More Effective Drug Discovery," Elsevier Academic Press.

Other names

Receptor-ligand interactionMolecular bindingBinding affinityDrug-receptor interaction

Not applicable as this is a biochemical process rather than a specific molecular target.