Mas-related G protein-coupled receptor X2 (MRGPRX2) belonging to the class A GPCR/Mas-related gene family is expressed in sensory neurons, mast cells, and keratinocytes. It has seven transmembrane (TM) α-helices. MRGPRX2 mRNA is found at a high level in the skin. It is also detected in adipose tissue, esophagus, urinary bladder, and lungs. MRGPRX2 gene with two-exon is mapped on human chromosome 11p15.

MRGPRX2 (NP_473371.1, 1 a.a. ~ 330 a.a) full-length human protein.

Sequence
MDPTTPAWGTESTTVNGNDQALLLLCGKETLIPVFLILFIALVGLVGNGFVLWLLGFRMRRNAFSVYVLSLAGADFLFLCFQIINCLVYLSNFFCSISINFPSFFTTVMTCAYLAGLSMLSTVSTERCLSVLWPIWYRCRRPRHLSAVVCVLLWALSLLLSILEGKFCGFLFSDGDSGWCQTFDFITAAWLIFLFMVLCGSSLALLVRILCGSRGLPLTRLYLTILLTVLVFLLCGLPFGIQWFLILWIWKDSDVLFCHIHPVSVVLSSLNSSANPIIYFFVGSFRKQWRLQQPILKLALQRALQDIAEVDHSEGCFRQGTPEMSRSSLV

Mas-related G protein-coupled receptor X2 (MRGPRX2) expressed on mast cells acts as an important receptor for pseudo-allergic responses induced by drugs. It is involved in the evolution of the human nervous system. It is also crucial to mast cells. MRGPRX2 gene mutation impairs the risk of anaphylactic actions facilitated by the MRGPRX2 receptor.

Solution in phosphate buffered saline, pH 7.4