Recombinant Mouse Mas-related G-protein coupled receptor member E (Mrgpre) is a laboratory-engineered protein that replicates the native Mrgpre receptor found in mice. Mrgpre belongs to the Mas-related G protein-coupled receptor (MRGPR) family, which is involved in sensory signaling, immune responses, and neuro-immune interactions . The recombinant form enables controlled studies of its structure, ligand interactions, and functional roles in vitro and in vivo.
Mrgpre is implicated in sensory and immune modulation:
Heterodimerization: Rat Mrgpre forms functional heterodimers with Mrgprd, altering β-alanine-induced calcium signaling and receptor internalization .
Ligand specificity: MRGPRs broadly recognize diverse ligands (e.g., peptides, small molecules), but Mrgpre’s endogenous ligands are not fully characterized.
Recombinant Mrgpre is critical for:
Ligand screening: Identifying agonists/antagonists via binding assays.
Mechanistic studies: Resolving activation pathways and crosstalk with other receptors (e.g., Mrgprd) .
Disease models: Investigating roles in itch, pain, and mast cell-mediated inflammation .
Structural data: No high-resolution structures of Mrgpre exist, hindering mechanistic insights .
Ligand identification: Endogenous ligands for Mrgpre remain unidentified, unlike MRGPRX2 (activated by basic secretagogues) .
Species differences: Human MRGPRE lacks direct rodent orthologs, complicating translational studies .
KEGG: mmu:244238
UniGene: Mm.183561