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Newer gene family pages are available

This is our older gene family page that is no longer maintained. Please go to our new look gene family index to view a complete list of our new maintained gene families. More information can be found in our gene families help page.

We have created a mapping file (Excel) that will map most of the old families to the new. However because we have changed the way we assign families and how we organise them, this file may not map all the old families.

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Class A GPCRs, rhodopsin-type

Specialist advisors:specialist advisor

For all G protein-coupled receptors, see our G protein-coupled receptors page  

 1)  Olfactory receptors     10) Nucleotide-like receptors
 Families: OR1, OR2OR3, OR4OR5 OR6OR7OR8OR9OR10  
 10a) Adenosine receptors   
 OR11 OR12,  OR13, OR14, OR51OR52OR55, OR56   10b) Purinergic receptors, P2Y  
 2) Amine receptors  11)   Opsin receptors  
 2a) Adrenoceptors  
 12)   Prokineticin receptors
2a.1) Adrenoceptors, alpha
 13)   Relaxin family peptide receptors  
2a.2) Adrenoceptors, beta
 14)   Resolvin receptors    
 2b) 5-HT (serotonin) receptors, G protein-coupled only
 15)   Protease activated receptors  
 2c) Cholinergic receptors, muscarinic
 16) Short Peptide receptors 
 2d) Dopamine receptors
 16a)  Angiotensin receptors 
 2e) Histamine receptors
 16b)  Bombesin receptors  
 2f) Trace amine receptors     16c)  Bradykinin receptors  
 3)  Chemokine receptors  
 16d)  Cholecystokinin receptors  
3.1) Chemokine (C-C motif) receptors  specilaist advisor  16e)  Endothelin receptors  
3.2) Chemokine (X-C motif) receptors
 16f)  Galanin receptors  
3.3) Chemokine (C-X-3C motif) receptors
 16g)  Gonadotropin-releasing hormone receptors   
3.4) Chemokine (C-X-C motif) receptors
 16h)  Hypocretin (orexin) receptors     
3.5) Atypical chemokine receptors   16i)   MCH receptors 
 4)  Complement component receptors    
 16j)   Melanocortin receptors  
 5)  Formyl peptide receptors 
 16k)  Motilin receptors
 6)  Gonadotropin and TSH receptors  16l)   Neuromedin U receptors 
 7)  Hydroxy-carboxylic acid receptors  16m) Neuropeptide receptors 
  8) Lipid-like receptors  16m.1) Neuropeptide FF/neuropeptide AF receptors
        8a) Cannabinoid receptors   16m.2) Neuropeptide S receptors
        8b) Fatty acid receptors  16m.3) Neuropeptide W/neuropeptide B receptors
        8c) Leukotriene receptors  16m.4) Neuropeptide Y receptors
8d) Lysophospholipid receptors   16n)  Neurotensin receptors
8d.1) Lysophosphatidic acid receptors    16o)  Opioid receptors 
       8d.2) Sphingosine 1-phosphate receptors    
 16p)  RF amide peptide receptors 
         8e) Prostanoid receptors
 16q)  Somatostatin receptors   
        8f) Platelet-activating factor receptors    16r)  Tachykinin receptors 
  9)  Melatonin receptors
16s)   Vasopressin/Oxytocin receptors
  16t)   Ghrelin receptors
   17)   GPCR class A, orphans


Click on the Approved Gene Symbol to retrieve the complete gene record

1)  Olfactory receptors   

2)  Amine receptors

2a)  Adrenoceptors

2a.1) Adrenoceptors, alpha :


2a.2) Adrenoceptors, beta :


2b) 5-HT (serotonin) receptors, G protein-coupled only :

Click here to see all  5-HT (serotonin) receptors

2c) Cholinergic receptors, muscarinic :

Click here to see all  Cholinergic receptors

2d) Dopamine receptors :


2e) Histamine receptors :


2f) Trace amine receptors :


3) Chemokine receptors

3.1) Chemokine ( C-C motif) receptors : 

3.2) Chemokine (X-C motif) receptors :   

3.3) Chemokine ( C-X-3-C motif) receptors : 

3.4)  Chemokine (C-X-C motif) receptors :  

Nomiyama H, Osada N, Yoshie O. A family tree of vertebrate chemokine receptors for a unified nomenclature. Dev Comp Immunol. 2011 Jul;35(7):705-15. PMID: 21295066

3.5)  Atypical chemokine receptors :  


4) Complement component  receptors :

Click here to see all  Complement system


5) Formyl peptide receptors :


6) Gonadotropin and TSH receptors :


7) Hydroxy-carboxylic acid receptors :

Strichman-Almashanu LZ, Bustin M, Landsman D. International Union of Basic and Clinical Pharmacology. LXXXII: Nomenclature and Classification of Hydroxy-carboxylic Acid Receptors (GPR81, GPR109A, and GPR109B). Pharmacol Rev. 2011 Jun;63(2):269-90.PMID:21454438



8)  Lipid-like receptors

8a) Cannabinoid receptors :


8b) Fatty acid receptors :


8c) Leukotriene receptors :


8d) Lysophospholipid receptors

8d.1) Lysophosphatidic acid receptors :

8d.2) Sphingosine 1-phosphate receptors :


8e) Prostanoid receptors :


8f) Platelet-activating factor receptors :


9) Melatonin receptors :


10)  Nucleotide-like receptors

10a) Adenosine receptors :

10b) Purinergic receptors, P2Y :

Click here to see all  Purinergic receptors


11) Opsin receptors :


12) Prokineticin receptors :


13) Relaxin family peptide receptors :


14) Resolvin receptors :


15) Protease activated receptors :


16)  Short Peptide receptors

16a) Angiotensin receptors :


16b) Bombesin receptors :


16c) Bradykinin receptors :


16d) Cholecystokinin receptors :


16e) Endothelin receptors :


16f) Galanin receptors :


16g) Gonadotropin-releasing hormone receptors :


16h) Hypocretin (orexin) receptors :


16i) MCH receptors :


16j) Melanocortin receptors :


16k) Motilin receptors :


16l) Neuromedin U receptors :


16m) Neuropeptide receptors

16m.1) Neuropeptide FF/neuropeptide AF receptors : 

16m.2) Neuropeptide S receptors : 

16m.3) Neuropeptide W/neuropeptide B receptors : 

16m.4) Neuropeptide Y receptors : 


16n) Neurotensin receptors :


16o) Opioid receptors :


16p) RF amide peptide receptors :


16q) Somatostatin receptors :


16r) Tachykinin receptors :


16s) Vasopressin/Oxytocin receptors :


16t) Ghrelin receptors :


17) GPCR class A, orphans :

This online database does not include our confidential data. If you would like to create a new gene symbol and name, the only way to confirm it as unique is by contacting us.