Comparison

Epitalon vs Kisspeptin

Function

While Epitalon is reported to increase lifespan and reduce tumor incidence in animals, and to influence differentiation of neural and mesenchymal stem cells; is studied as an epigenetic regulatory peptide36, Kisspeptin is a key regulator of the hypothalamic–pituitary–gonadal axis, controlling puberty and fertility; kisspeptin-10 also inhibits trophoblast invasion and tumor metastasis in experimental models339199.

Mechanism

While Epitalon works as a synthetic tetrapeptide, Ala-Glu-Asp-Gly (AEDG), that has been shown to bind histones and modulate gene expression and chromatin state, with reported effects on pineal function, neurogenesis, and longevity in animal models36, Kisspeptin is a family of peptides (eg, kisspeptin-10, -13, -14, -54) derived from the KISS1 precursor that activate G-protein–coupled receptor KISS1R (GPR54), triggering GnRH release and regulating pubertal onset and reproductive axis activity339199.

Length and Sequence

Epitalon is 4 amino acids long, whereas Kisspeptin is longer as it has a length of 10 amino acids. Epitalon is made up of a sequence of Alanine, Glutamic acid, Aspartic acid, Glycine. Kisspeptin is made up of a sequence of Tyrosine, Asparagine, Tryptophan, Asparagine, Serine, Phenylalanine, Glycine, Leucine, Arginine, Tyrosine.

Receptor

Epitalon

Binds nuclear histone proteins (H1, H2B, H3, H4) rather than a classic membrane receptor36

Kisspeptin

KISS1R (GPR54) kisspeptin receptor33919943

Organism or Origin

Epitalon

Synthetic peptide modeled after a pineal gland peptide fraction; not directly encoded as a standalone peptide in humans36

Kisspeptin

Endogenous human peptide products of the KISS1 gene9199

Gene

Epitalon

Not assigned in the current dataset.

Kisspeptin

KISS1

Sources

36AEDG Peptide (Epitalon) Stimulates Gene Expression and Protein ..., https://pmc.ncbi.nlm.nih.gov/articles/PMC7037223/
70Kisspeptin-10, rat, https://pubchem.ncbi.nlm.nih.gov/compound/Kisspeptin-10_-rat
91Kisspeptin - Wikipedia, https://en.wikipedia.org/wiki/Kisspeptin
99Kisspeptin-1 - an overview, https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/kisspeptin-1