Thromboxane A2 receptor

NameThromboxane A2 receptor
Synonyms
  • Prostanoid TP receptor
  • TXA2-R
Gene NameTBXA2R
OrganismHuman
Amino acid sequence
>lcl|BSEQ0037068|Thromboxane A2 receptor
MWPNGSSLGPCFRPTNITLEERRLIASPWFAASFCVVGLASNLLALSVLAGARQGGSHTR
SSFLTFLCGLVLTDFLGLLVTGTIVVSQHAALFEWHAVDPGCRLCRFMGVVMIFFGLSPL
LLGAAMASERYLGITRPFSRPAVASQRRAWATVGLVWAAALALGLLPLLGVGRYTVQYPG
SWCFLTLGAESGDVAFGLLFSMLGGLSVGLSFLLNTVSVATLCHVYHGQEAAQQRPRDSE
VEMMAQLLGIMVVASVCWLPLLVFIAQTVLRNPPAMSPAGQLSRTTEKELLIYLRVATWN
QILDPWVYILFRRAVLRRLQPRLSTRPRSLSLQPQLTQRSGLQ
Number of residues343
Molecular Weight37430.69
Theoretical pI10.31
GO Classification
Functions
  • thromboxane A2 receptor activity
  • guanyl-nucleotide exchange factor activity
Processes
  • second-messenger-mediated signaling
  • inflammatory response
  • thromboxane A2 signaling pathway
  • platelet activation
  • positive regulation of cytosolic calcium ion concentration
  • G-protein coupled receptor signaling pathway
  • positive regulation of smooth muscle contraction
  • response to lipopolysaccharide
  • positive regulation of GTPase activity
  • positive regulation of vasoconstriction
  • positive regulation of angiogenesis
  • response to nutrient
  • blood coagulation
  • positive regulation of blood pressure
  • response to drug
Components
  • plasma membrane
  • cytosol
  • integral component of plasma membrane
  • acrosomal vesicle
General FunctionThromboxane a2 receptor activity
Specific FunctionReceptor for thromboxane A2 (TXA2), a potent stimulator of platelet aggregation. The activity of this receptor is mediated by a G-protein that activates a phosphatidylinositol-calcium second messenger system. In the kidney, the binding of TXA2 to glomerular TP receptors causes intense vasoconstriction. Activates phospholipase C. Isoform 1 activates adenylyl cyclase. Isoform 2 inhibits adenylyl cyclase.
Pfam Domain Function
Transmembrane Regions30-52 67-87 107-128 150-172 194-219 247-270 290-311
GenBank Protein ID533326
UniProtKB IDP21731
UniProtKB Entry NameTA2R_HUMAN
Cellular LocationCell membrane
Gene sequence
>lcl|BSEQ0019006|Thromboxane A2 receptor (TBXA2R)
ATGTGGCCCAACGGCAGTTCCCTGGGGCCCTGTTTCCGGCCCACAAACATTACCCTGGAG
GAGAGACGGCTGATCGCCTCGCCCTGGTTCGCCGCCTCCTTCTGCGTGGTGGGCCTGGCC
TCCAACCTGCTGGCCCTGAGCGTGCTGGCGGGCGCGCGGCAGGGGGGTTCGCACACGCGC
TCCTCCTTCCTCACCTTCCTCTGCGGCCTCGTCCTCACCGACTTCCTGGGGCTGCTGGTG
ACCGGTACCATCGTGGTGTCCCAGCACGCCGCGCTCTTCGAGTGGCACGCCGTGGACCCT
GGCTGCCGTCTCTGTCGCTTCATGGGCGTCGTCATGATCTTCTTCGGCCTGTCCCCGCTG
CTGCTGGGGGCCGCCATGGCCTCAGAGCGCTACCTGGGTATCACCCGGCCCTTCTCGCGC
CCGGCGGTCGCCTCGCAGCGCCGCGCCTGGGCCACCGTGGGGCTGGTGTGGGCGGCCGCG
CTGGCGCTGGGCCTGCTGCCCCTGCTGGGCGTGGGTCGCTACACCGTGCAATACCCGGGG
TCCTGGTGCTTCCTGACGCTGGGCGCCGAGTCCGGGGACGTGGCCTTCGGGCTGCTCTTC
TCCATGCTGGGCGGCCTCTCGGTCGGGCTGTCCTTCCTGCTGAACACGGTCAGCGTGGCC
ACCCTGTGCCACGTCTACCACGGGCAGGAGGCGGCCCAGCAGCGTCCCCGGGACTCCGAG
GTGGAGATGATGGCTCAGCTCCTGGGGATCATGGTGGTGGCCAGCGTGTGTTGGCTGCCC
CTTCTGGTCTTCATCGCCCAGACAGTGCTGCGAAACCCGCCTGCCATGAGCCCCGCCGGG
CAGCTGTCCCGCACCACGGAGAAGGAGCTGCTCATCTACTTGCGCGTGGCCACCTGGAAC
CAGATCCTGGACCCCTGGGTGTATATCCTGTTCCGCCGCGCCGTGCTCCGGCGTCTCCAG
CCTCGCCTCAGCACCCGGCCCAGGTCGCTGTCCCTCCAGCCCCAGCTCACGCAGCGCTCC
GGGCTGCAGTAG
GenBank Gene IDD38081
GeneCard IDNot Available
GenAtlas IDTBXA2R
HGNC IDHGNC:11608
Chromosome Location19
Locus19p13.3
References
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  4. Raychowdhury MK, Yukawa M, Collins LJ, McGrail SH, Kent KC, Ware JA: Alternative splicing produces a divergent cytoplasmic tail in the human endothelial thromboxane A2 receptor. J Biol Chem. 1995 Mar 24;270(12):7011. 7896853
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