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P2Y12 receptor

Family: P2Y receptors

Contents:
Gene and Protein Information
Previous and Unofficial Names
Database Links
Agonists
Antagonists
Transduction Mechanisms
Tissue Distribution
Expression Datasets
Functional Assays
Physiological Functions
Physiological Consequences of Altering Gene Expression
Phenotypes, Alleles and Disease Models
Clinically-Relevant Mutations and Pathophysiology
Biologically Significant Variants
General Comments
References
Gene and Protein Information
class A G protein-coupled receptor
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human 7 342 3q24-q25 P2RY12 purinergic receptor P2Y, G-protein coupled, 12 4,18
Mouse 7 347 3 D P2ry12 purinergic receptor P2Y, G-protein coupled 12 27
Rat 7 343 2q31 P2ry12 purinergic receptor P2Y, G-protein coupled, 12 18,31
Previous and Unofficial Names
P2T
P2YAC
P2TAC
P2Y?
P2YADP
P2Ycyc
SP1999
P2T
P2Y12
HORK3
P2Y purinoceptor 12
P2Y12 platelet ADP receptor
purinergic receptor P2Y, G-protein coupled 12
purinergic receptor P2Y, G-protein coupled, 12
2900079B22Rik
4921504D23Rik
Database Links
ChEMBL Target
DrugBank Target
Ensembl
Entrez Gene
GeneCards
GenitoUrinary Development Molecular Anatomy Project
HomoloGene
Human Protein Reference Database
InterPro
KEGG Gene
OMIM
Orphanet Gene
PharmGKB Gene
PhosphoSitePlus
Protein Ontology (PRO)
RefSeq Nucleotide
RefSeq Protein
TreeFam
UniGene Hs.
UniProt
Wikipedia
Search for 3D structures on the PDB
Search by keyword: P2Y receptors P2Y12 receptor
Natural/Endogenous Ligand(s)
ADP
ATP
Rank order of potency (Human)
Agonists
Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Affinity Units Reference
2MeSADP Hs Full agonist 9.2 pKi 17
2MeSATP Hs Full agonist 8.7 pKi 17
ADP Hs Full agonist 5.9 pKi 17
ATPγS Hs Full agonist 5.5 pKi 17
ATP Hs Full agonist 5.2 pKi 17
ADPβS Hs Full agonist 8.6 pIC50 33
[3H]2MeSADP Hs Full agonist 7.5 – 9.6 pIC50 33
Agonist Comments
An in silico screening for endogenous ligands acting on the human P2Y12receptor revealed cysteinylleukotrienes (CysLTs) and 5-phosphoribosyl 1-pyrophosphate (PRPP) as potential ligands, in addition to the already known P2Y12 ligands such as 2MeSADP and ADP. In CHO cells stably expressing P2Y12-Gα16 fusion proteins, CysLTE4 and PRPP acted on the P2Y12 receptor as agonists with EC50 values of 1.3 and 7.8 nM, respectively [25]
Antagonists
Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Affinity Units Reference
active metabolite of clopidogrel Hs Antagonist 6.9 pKi 17
pCMPS Hs Antagonist 5.9 pKi 17
cangrelor Hs Antagonist 8.0 pIC50 33
ARL66096 Hs Antagonist 7.95 pIC50 19-20
INS50589 Hs Antagonist 7.95 pIC50 9
AZD6140 Hs Antagonist 7.9 pIC50 35
BX 667 Hs Antagonist 7.0 pIC50 28
INS49266 Hs Antagonist 6.28 pIC50 9
2MeSAMP Hs Antagonist 5.4 pIC50 33
R-138727 Hs Antagonist 4.7 – 5.7 pIC50 15
BX 048 Hs Antagonist 0.0 – 6.5 pIC50 28
Antagonist Comments
A recent paper analysed the molecular mechanisms by which 2MeSAMP and Cangrelor (ARC69931MX), two widely used P2Y12 antagonists, inhibit human platelet activation. 2MeSAMP and ARC69931MX interacted with an unidentified platelet G protein-coupled receptor inducing cAMP-mediated inhibition of platelet function. This inhibition is in addition to that derived from antagonism of P2Y16 receptors [32]. PRT060128 is a patented high affinity antagonist [14].

Explore drug-target interactions for this set of compounds using iPHACE

Primary Transduction Mechanisms
Transducer Effector/Response
Gi/Go family Adenylate cyclase inhibition
References:  31
Secondary Transduction Mechanisms
Transducer Effector/Response
Gi/Go family Adenylate cyclase inhibition
Other - See Comments
Comments:  The intracellular pathways through which P2Y12 amplifies platelet responses include inhibition of cyclic AMP production, vasodilator-stimulated phosphoprotein (VASP) dephosphorylation, phosphoinositide 3 kinase (PI 3-K) and small GTPase Rap1b activation [13],[30]. In some experimental systems, P2Y12/P2Y13 receptors were found to be coupled to [Ca2+]i increases. In particular, in microglial and satellite glial cells from trigeminal ganglia, the ADP-induced [Ca2+]i responses were significantly reduced after pretreatement with Cangrelor, an antagonist selective for P2Y12 and P2Y13, thus suggesting their activation may also contribute to ADP-mediated effects [3],[8].
References: 
Tissue Distribution
Platelets and brain tissues.
Species:  Human
Technique:  Northern blotting.
References:  18
vascular smooth muscle cells
Species:  Human
Technique:  real-time PCR
References:  36
spinal cord microglia
Species:  Rat
Technique:  Immunohistochemistry
References:  22
epithelial cells lining intrahepatic bile ducts (cholangiocytes)
Species:  Rat
Technique:  RT-PCR, western blot
References:  23
Brain, heart, spleen, lung, liver and macrophages.
Species:  Rat
Technique:  Northern blotting.
References:  29
Brain (in particular glial cells).
Species:  Rat
Technique:  In situ hybridisation and immunocytochemistry.
References:  29
Expression Datasets

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Log average relative transcript abundance in mouse tissues measured by qPCR from Regard, J.B., Sato, I.T., and Coughlin, S.R. (2008). Anatomical profiling of G protein-coupled receptor expression. Cell, 135(3): 561-71. [PMID:18984166] [Raw data: website]

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Functional Assays
Measurement of VASP phosphorylation in human platelets endogenously expressing the P2Y12 receptor.
Species:  Human
Tissue:  Platelets.
Response measured:  Inhibition of cAMP-dependent PKA activity.
References:  2
Measurement of cAMP levels in human platelets endogenously expressing the P2Y12 receptor.
Species:  Human
Tissue:  Platelets
Response measured:  inhibition of PGE1-induced platelet cAMP accumulation
References:  6
Measurement of Ca2+ current in SCG neurons transfected with the rat P2Y12 receptor and endogenously expressing N-type Ca2+ channels.
Species:  Rat
Tissue:  SCG neurons.
Response measured:  Inhibition of ICa(N).
References:  31
Measurement of IP levels in COS-7 cells transfected with the human P2Y12 receptor.
Species:  Human
Tissue:  COS-7 cells.
Response measured:  IP accumulation.
References:  4
Measurement of cAMP levels in 1321N1 cells transfected with the rat P2Y12 receptor.
Species:  Rat
Tissue:  1321N1 cells.
Response measured:  Inhibition of cAMP accumulation (PTX-sensitive).
References:  31
Measurement of K+ current using patch-clamping of SCG cells transfected with the P2Y12 receptor and GIRK1 and GIRK2 channels.
Species:  Rat
Tissue:  SCG neurons.
Response measured:  Near-stable activation of GIRK.
References:  31
Measurement of cAMP levels in CHO cells transfected with the human P2Y12 receptor.
Species:  Human
Tissue:  CHO cells.
Response measured:  Inhibition of cAMP accumulation.
References:  18
Physiological Functions
Role in sustaining platelet aggregation and in promoting thrombus growth and stabilization. Role in dense and alpha granule secretion, P-selectin expression and microparticle formation.
Species:  Human
Tissue:  Platelets
References:  13,21
Role in the vessel wall response to arterial injury and thrombosis
Species:  Mouse
Tissue:  Platelets
References:  10
Role in microglial chemotaxis
Species:  Mouse
Tissue:  hippocampal tissue slices
References:  16,26
Physiological Consequences of Altering Gene Expression
P2Y12 receptor knockout mice show impaired platelet activation/adhesion in in vivo mesenteric arteries when compared to the wild-type.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells.
References:  1
Microglia in P2Y12 knock-out mice show significantly diminished directional branch extension toward sites of cortical damage in the living mouse.
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells
References:  16
In spinal microglia, after partial sciatic nerve transection, antisense knockdown of P2Y12 expression suppressed the development of pain behaviors.
Species:  Rat
Tissue: 
Technique:  Antisense oligonucleotide
References:  22
mice lacking P2Y12 displayed impaired tactile allodynia after nerve injury
Species:  Mouse
Tissue: 
Technique:  Gene targeting in embryonic stem cells
References:  34
Phenotypes, Alleles and Disease Models Mouse data from MGI

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Allele Composition & genetic background Accession Phenotype Id Phenotype Reference
P2ry12tm1Pcon P2ry12tm1Pcon/P2ry12tm1Pcon
involves: 129P2/OlaHsd * C57BL/6
MGI:1918089  MP:0002551 abnormal blood coagulation PMID: 12897207 
P2ry12tm1Pcon P2ry12tm1Pcon/P2ry12tm1Pcon
involves: 129P2/OlaHsd * C57BL/6
MGI:1918089  MP:0005464 abnormal platelet physiology PMID: 12897207 
P2ry12tm1Pcon P2ry12tm1Pcon/P2ry12tm1Pcon
involves: 129P2/OlaHsd * C57BL/6
MGI:1918089  MP:0009549 decreased platelet aggregation PMID: 12897207 
P2ry12tm1Cjf P2ry12tm1Cjf/P2ry12tm1Cjf
involves: 129/Sv
MGI:1918089  MP:0009549 decreased platelet aggregation PMID: 11413167 
P2ry12tm1Pcon P2ry12tm1Pcon/P2ry12tm1Pcon
involves: 129P2/OlaHsd * C57BL/6
MGI:1918089  MP:0005606 increased bleeding time PMID: 12897207 
P2ry12tm1Cjf P2ry12tm1Cjf/P2ry12tm1Cjf
involves: 129/Sv
MGI:1918089  MP:0005606 increased bleeding time PMID: 11413167 
Clinically-Relevant Mutations and Pathophysiology
Disease:  Platelet-type bleeding disorder
OMIM: 
Orphanet: 
Comments: 
References:  5-6
Click column headers to sort
Type Species Molecular location Description Reference
single nucleotide polymorphism Human R256Q 5-6
single nucleotide polymorphism Human R265W 5-6
Biologically Significant Variants
A group of single nucleotide polymorphisms in the P2Y12 gene, forming the so called P2Y12 H2 haplotype, has been associated with increased platelet responsiveness to ADP, increased risk of pheripheral arterial disease and with coronary artery disease.
Type:  Naturally occuring mutations
Species:  Human
References:  7,11-12,37
General Comments
Clopidogrel has a well-established role as an antithrombotic agent in the settings of percutaneous coronary intervention and acute coronary syndromes. However, it has a relatively slow onset of action and a significant number of patients show variable degrees of responsiveness or "resistance" to it. Novel P2Y12 antagonists, including Cangrelor, Prasugrel and AZD6140, all currently in phase 3 trials, have a faster onset of action, as well as more potent and less variable inhibition of platelet function ex vivo [24]. PRT060128, an investigational, direct-acting, reversible P2Y12 antagonist with a novel structure (not disclosed) has completed phase 1 clinical studies [24].

REFERENCES

To cite this database page, please use the following:

Maria-Pia Abbracchio, Jean-Marie Boeynaems, José L. Boyer, Geoffrey Burnstock, Stefania Ceruti, Marta Fumagalli, Christian Gachet, Rebecca Hills, Robert G. Humphries, Kenneth A. Jacobson, Charles Kennedy, Brian F. King, Davide Lecca, Maria Teresa Miras-Portugal, Gary A. Weisman.
P2Y receptors: P2Y12 receptor. Last modified on 12/03/2013. Accessed on 22/05/2013. IUPHAR database (IUPHAR-DB), http://www.iuphar-db.org/DATABASE/ObjectDisplayForward?objectId=328.


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