Skip to content
Pharmacology & Mechanisms

Melanocortin receptor

A family of five G protein-coupled receptors (MC1R–MC5R) involved in pigmentation, appetite regulation, sexual function, and inflammation. Targeted by PT-141 (MC3R/MC4R) and Melanotan II (multiple subtypes).

Frequently Asked Questions

What is Melanocortin receptor?
A family of five G protein-coupled receptors (MC1R–MC5R) involved in pigmentation, appetite regulation, sexual function, and inflammation. Targeted by PT-141 (MC3R/MC4R) and Melanotan II (multiple subtypes).
Why is Melanocortin receptor important in peptide research?
Melanocortin receptor is a key pharmacological concept that determines how peptides interact with the body. Understanding this term helps practitioners optimize dosing protocols, predict therapeutic outcomes, and minimize side effects.

Related Terms

Receptor agonist

A molecule that binds to and activates a receptor, triggering a biological response. Semaglutide is a GLP-1 receptor agonist; ipamorelin is a ghrelin receptor agonist.

Cross-reactivity

The ability of a peptide designed for one receptor to bind to and activate related receptors. For example, Melanotan II activates multiple melanocortin receptor subtypes, producing both tanning and sexual arousal effects.

Selectivity

The ability of a peptide to preferentially bind to one receptor subtype over others. Ipamorelin is considered a selective GH secretagogue because it stimulates GH release without significantly affecting cortisol or prolactin.

Related Peptide Profiles

PT-141

Bremelanotide, a melanocortin receptor agonist FDA-approved as Vyleesi for hypoactive sexual desire disorder (HSDD) in premenopausal women.

Melanotan II

A synthetic analog of alpha-MSH that activates melanocortin receptors to stimulate melanogenesis (tanning) and sexual arousal.

← Back to full glossary