Lesson 7 of 36 · 12 min
Peptide families, targets & pathways
Names are easier to remember once you know the family they belong to. Families group compounds by shared biology, receptor systems or structural ideas rather than by internet popularity.
Think in families
A family gives you the first clue about mechanism.
Incretin / metabolic signalling
GLP-1, GIP and glucagon-related pathways involved in appetite, glucose handling and energy balance.
Explore →GHRH & secretagogue signalling
Peptides that influence the growth-hormone axis through GHRH or ghrelin-related pathways.
Explore →Melanocortin signalling
Compounds acting at melanocortin receptors, with effects that can differ dramatically by receptor and context.
Explore →Copper-binding peptides
GHK-Cu is the best-known example, linking peptide signalling with copper biology and tissue-remodelling research.
Explore →Mitochondrial-derived peptides
Molecules such as MOTS-c are researched around mitochondrial signalling, metabolism and cellular stress responses.
Explore →Neuropeptide research
Compounds such as Semax and Selank are studied around nervous-system signalling, stress and cognition.
Explore →Why families help
They stop you comparing compounds that answer different biological questions.
Two peptides can both be discussed for body composition while acting through entirely different pathways. One may alter appetite signalling, another may influence the growth-hormone axis. The outcome label overlaps; the mechanism does not.
Family thinking also helps when a new molecule appears. Instead of starting from zero, ask what receptor or signalling family it belongs to and what is already known about that system.
Key takeaways
- ✓Peptide families are based on shared biology, targets or structural relationships.
- ✓The same outcome can be approached through different peptide families.
- ✓Family context makes new compounds easier to understand.
- ✓The individual molecule and its evidence still matter more than the family name.
Further reading
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