Drug-Receptor Interactions
Start with the big picture
Most drug–receptor binding is reversible and depends on non-covalent forces, including ionic interactions, hydrogen bonds, hydrophobic effects, and van der Waals forces. Affinity describes binding strength, whereas efficacy describes the ability to produce a response; these properties are distinct. Dose–response curves help compare potency and maximal effect, while agonists and antagonists differ in how they influence receptor activity. Allosteric modulators act at a separate site, and selectivity describes preference among receptor subtypes. Drug-design concepts extend this foundation: pharmacophores identify essential spatial features, SAR examines how structural changes affect activity, and stereochemistry can influence binding. Together, these ideas provide a framework for understanding and optimizing drug action.
What you'll learn
- Describe common forces involved in drug–receptor binding.
- Distinguish affinity, efficacy, potency, and maximal response.
- Compare agonists, antagonists, and allosteric modulators.
- Explain how pharmacophores, SAR, and stereochemistry inform drug design.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
