Comparison

Humanin vs Selank

Function

While Humanin exerts neuroprotective and cytoprotective effects in models of Alzheimer’s disease, ischemia, and metabolic stress, reducing apoptosis and improving cell survival7136141, Selank is a peptide developed in Russia as an anxiolytic and nootropic; in animal models it reduces anxiety-like behavior and modulates immune parameters under stress39.

Mechanism

While Humanin works as a mitochondrial-derived 24-amino-acid peptide that protects cells against diverse apoptotic insults by interacting with cell-surface cytokine receptor complexes and intracellular targets, thereby activating pro-survival STAT3 and other pathways7136141, Selank is a synthetic heptapeptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro, that combines a tuftsin fragment with a Pro-Gly-Pro motif and is reported to modulate GABAergic neurotransmission and cytokine balance while being resistant to proteolytic degradation39.

Length and Sequence

Humanin is 24 amino acids long, whereas Selank is shorter as it has a length of 7 amino acids. Humanin is made up of a sequence of Methionine, Alanine, Proline, Arginine, Glycine, Phenylalanine, Serine, Cysteine, Leucine, Leucine, Leucine, Leucine, Leucine, Threonine, Serine, Glutamic acid, Isoleucine, Aspartic acid, Leucine, Proline, Valine, Lysine, Arginine, Arginine, Alanine. Selank is made up of a sequence of Threonine, Lysine, Proline, Arginine, Proline, Glycine, Proline.

Receptor

Humanin

Binds a trimeric cytokine receptor complex consisting of CNTFR, WSX-1, and gp130, and can also signal via the G-protein–coupled receptor FPRL1/FPR2136141

Selank

Not clearly established in the current dataset.

Organism or Origin

Humanin

Human mitochondrial peptide encoded within the 16S rRNA gene region7685

Selank

Synthetic analog of the IgG-derived tetrapeptide tuftsin39

Gene

Humanin

MT-RNR2

Selank

Not assigned in the current dataset.

Related articles

No related articles are linked to these peptides yet.

Sources

7Evidence of natural selection in the mitochondrial-derived peptides ..., https://www.nature.com/articles/s41598-023-41053-0
53Frequently Asked Questions, https://www.peptidejournal.org/peptides/humanin-mitochondrial-peptide-research
76Humanin - Wikipedia, https://en.wikipedia.org/wiki/Humanin
85MT-RNR2 - Wikipedia, https://en.wikipedia.org/wiki/MT-RNR2
141Humanin: a harbinger of mitochondrial-derived peptides? - PMC - NIH, https://pmc.ncbi.nlm.nih.gov/articles/PMC3641182/
39Application of thr-lys-pro-arg-pro-gly-pro peptide (selank) for ..., https://patents.google.com/patent/RU2629832C1/en