ID   MRGX2_HOOHO             Reviewed;         329 AA.
AC   Q4QXU6;
DT   20-DEC-2005, integrated into UniProtKB/Swiss-Prot.
DT   19-JUL-2005, sequence version 1.
DT   02-DEC-2020, entry version 47.
DE   RecName: Full=Mas-related G-protein coupled receptor member X2;
GN   Name=MRGPRX2; Synonyms=MRGX2;
OS   Hoolock hoolock (Western hoolock gibbon) (Bunopithecus hoolock).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hylobatidae;
OC   Hoolock.
OX   NCBI_TaxID=61851;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=15862286; DOI=10.1016/j.gene.2005.03.001;
RA   Yang S., Liu Y., Lin A.A., Cavalli-Sforza L.L., Zhao Z., Su B.;
RT   "Adaptive evolution of MRGX2, a human sensory neuron specific gene involved
RT   in nociception.";
RL   Gene 352:30-35(2005).
CC   -!- FUNCTION: Mast cell-specific receptor for basic secretagogues, i.e.
CC       cationic amphiphilic drugs, as well as endo- or exogenous peptides,
CC       consisting of a basic head group and a hydrophobic core. Recognizes and
CC       binds small molecules containing a cyclized tetrahydroisoquinoline
CC       (THIQ), such as non-steroidal neuromuscular blocking drugs (NMBDs),
CC       including tubocurarine and atracurium. In response to these compounds,
CC       mediates pseudo-allergic reactions characterized by histamine release,
CC       inflammation and airway contraction. {ECO:0000250|UniProtKB:Q3KNA1}.
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255}; Multi-pass membrane
CC       protein {ECO:0000255}.
CC   -!- SIMILARITY: Belongs to the G-protein coupled receptor 1 family. Mas
CC       subfamily. {ECO:0000255|PROSITE-ProRule:PRU00521}.
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DR   EMBL; AY651162; AAW70075.1; -; Genomic_DNA.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0004930; F:G protein-coupled receptor activity; ISS:UniProtKB.
DR   GO; GO:1990595; F:mast cell secretagogue receptor activity; ISS:UniProtKB.
DR   GO; GO:0045576; P:mast cell activation; ISS:UniProtKB.
DR   GO; GO:0043303; P:mast cell degranulation; ISS:UniProtKB.
DR   InterPro; IPR000276; GPCR_Rhodpsn.
DR   InterPro; IPR017452; GPCR_Rhodpsn_7TM.
DR   InterPro; IPR026234; MRGPCRFAMILY.
DR   PANTHER; PTHR11334; PTHR11334; 1.
DR   Pfam; PF00001; 7tm_1; 1.
DR   PRINTS; PR00237; GPCRRHODOPSN.
DR   PRINTS; PR02108; MRGPCRFAMILY.
DR   PROSITE; PS00237; G_PROTEIN_RECEP_F1_1; 1.
DR   PROSITE; PS50262; G_PROTEIN_RECEP_F1_2; 1.
PE   3: Inferred from homology;
KW   Cell membrane; G-protein coupled receptor; Membrane; Receptor; Transducer;
KW   Transmembrane; Transmembrane helix.
FT   CHAIN           1..329
FT                   /note="Mas-related G-protein coupled receptor member X2"
FT                   /id="PRO_0000069773"
FT   TOPO_DOM        1..33
FT                   /note="Extracellular"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        34..54
FT                   /note="Helical; Name=1"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        55..63
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        64..84
FT                   /note="Helical; Name=2"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        85..96
FT                   /note="Extracellular"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        97..117
FT                   /note="Helical; Name=3"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        118..144
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        145..165
FT                   /note="Helical; Name=4"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        166..184
FT                   /note="Extracellular"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        185..205
FT                   /note="Helical; Name=5"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        206..228
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        229..249
FT                   /note="Helical; Name=6"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        250..263
FT                   /note="Extracellular"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        264..284
FT                   /note="Helical; Name=7"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        285..329
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   329 AA;  36904 MW;  CE5044BAC1934880 CRC64;
     MDPTTPAWGT ESTTMDGNDQ SLPLLCDKEA LIPVFLILFI ALVGLVGNGF VLWLLGFRMS
     RNAFSVYVLS LAGADFLFLC FQIINCLVYL RDFFCSISIN FPSXFTTVMT CAYLAGLSML
     STISTERCLS VLWPIWYRCR RPRHLSAVVC VLLWALSLLL SILEGKFCGF LFSDGDFGWC
     QIFDFITAAW LIFLFVVLCA SSLALLVRIL CGSRGLPLTR LYLTILLTVL VFLLCGLPFG
     IQWFLILGFW NSDVLLCHIH LVSVVLSSLN SSANPIIYFF VGSFRKQWRL QQPILKLAFQ
     RALQDTAEVD HSEGCFPQGT SEMSRSSLV