PEN (human) TFA, one of the most abundant hypothalamic neuropeptide and derived from the proprotein ProSAAS, is an endogenous ligand of GPR83 [1].
In Vitro, Mouse PEN (mPEN) and rat PEN (rPEN) only differ by one residue at the N-terminal end, whereas human PEN (hPEN) is more divergent and has the sequence PEG instead of PEN[2].
References:
[1]. Seshat M Mack, et al. Neuropeptide PEN and Its Receptor GPR83: Distribution, Signaling, and Regulation. ACS Chem Neurosci. 2019 Apr 17;10(4):1884-1891.
[2]. Ivone Gomes, et al. Identification of GPR83 as the receptor for the neuroendocrine peptide PEN. Sci Signal. 2016 Apr 26;9(425):ra43.
In Vitro, Mouse PEN (mPEN) and rat PEN (rPEN) only differ by one residue at the N-terminal end, whereas human PEN (hPEN) is more divergent and has the sequence PEG instead of PEN[2].
References:
[1]. Seshat M Mack, et al. Neuropeptide PEN and Its Receptor GPR83: Distribution, Signaling, and Regulation. ACS Chem Neurosci. 2019 Apr 17;10(4):1884-1891.
[2]. Ivone Gomes, et al. Identification of GPR83 as the receptor for the neuroendocrine peptide PEN. Sci Signal. 2016 Apr 26;9(425):ra43.