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Structure-Function Characteristics and Signaling Properties of Lipidated Peptidomimetic FPR2 Agonists: Peptoid Stereochemistry and Residues in the Vicinity of the Headgroup Affect Function
Formyl peptide receptor 2 (FPR2) plays important roles in inflammation. In the present study, 20 analogues of the FPR2-selective lipidated alpha-peptide/beta-peptoid agonist Lau-[(S)-Aoc]-[Lys-betaNPhe]6-NH2 were generated, which allowed two novel subclasses of more potent FPR2 agonists to be distinguished. Critical factors influencing FPR2 recognition comprise the presence of beta-peptoid phenylalanine-like residues (i.e., betaNPhe, betaNspe, or betaNrpe) in the peptidomimetic tail, configuration of the 2-Aminooctanoic acid (Aoc) in the headgroup, and the length of the N-Terminal fatty acid. Intriguingly, a single betaNrpe residue in the vicinity of the N-Terminus (i.e., Lau-[(S)-Aoc]-Lys-betaNrpe-[Lys-betaNPhe]5-NH2) proved to increase the agonist potency, whereas the betaNspe-containing analogue was a weak FPR2-selective antagonist. Another subclass displaying potent agonism comprised analogues possessing two alpha-Amino acids vicinal to the headgroup. The optimized FPR2-Activating lipidated peptidomimetics exhibited biased signaling: PLC-PIP2-Ca2+ signaling was activated, but without recruitment of beta-Arrestin or induction of chemotaxis. These FPR2-interacting compounds are considered to be useful tools in future studies of receptor-ligand interactions.
One of the oldest and most widely used commercial enzyme inhibitors is aspirin, Safety of 6-Amino-2,3-dihydrophthalazine-1,4-dione, which selectively inhibits one of the enzymes involved in the synthesis of molecules that trigger inflammation. you can also check out more blogs about 3682-14-2
Reference£º
Phthalazine – Wikipedia,
Phthalazine | C8H6N568 – PubChem