LPA6 receptor

Target id: 163

Nomenclature: LPA6 receptor

Family: Lysophospholipid (LPA) receptors

Annotation status:  image of a green circle Annotated and expert reviewed. Please contact us if you can help with updates.  » Email us

Gene and Protein Information
class A G protein-coupled receptor
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human 7 344 13q14 LPAR6 lysophosphatidic acid receptor 6 9,13
Mouse 7 344 14 Lpar6 lysophosphatidic acid receptor 6
Rat 7 344 15p11 Lpar6 lysophosphatidic acid receptor 6
Previous and Unofficial Names
LPA receptor 6
oleoyl-L-alpha-lysophosphatidic acid receptor
P2Y purinoceptor 5
purinergic receptor 5
Database Links
ChEMBL Target
Ensembl Gene
Entrez Gene
GenitoUrinary Development Molecular Anatomy Project
Human Protein Reference Database
Orphanet Gene
PharmGKB Gene
Protein Ontology (PRO)
RefSeq Nucleotide
RefSeq Protein
UniGene Hs.
Natural/Endogenous Ligands
Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Affinity Units Reference
LPA Hs Agonist 6.0 pEC50 9,17
pEC50 6.0 [9,17]
LPA Mm Partial agonist 6.0 pEC50 17
pEC50 6.0 (EC50 1x10-6 M) [17]
View species-specific agonist tables
Agonist Comments
LPA6 was originally reported to bind extracellular nucleotides as ligands [16], although this was not substantiated by additional experiments [5,15].

Alkyl OMPT had similar agonist activity as 1-oleoyl LPA [17].
Primary Transduction Mechanisms
Transducer Effector/Response
Gs family
Gi/Go family
G12/G13 family
Adenylate cyclase stimulation
Phospholipase C stimulation
Other - See Comments
Comments:  Increased intracellular calcium using a promiscuous Gs protein, ERK1/2 activation, and reduced forskolin-stimulated cAMP. G13-Rho pathway [17], and Gα12/13-Rho, PLC, PKC, ROCK, p38, PI3K pathway stimulation [4].
References:  4,9,17
Tissue Distribution
Hair cells (follicles: skin, scalp, eyebrow), leukocytes
Expression level:  High
Species:  Human
Technique:  Protein blot, PCR, immunofluorescence
References:  8-10
Expression level:  High
Species:  Human
Technique:  Protein blot, PCR, immunofluorescence
References:  9
Spleen, thymus, leukocyte, prostate, ovary, testis, small intestine, colon, pancreas, placenta, liver, lung, heart, brain, skeletal muscle, kidney, keratinocytes
Species:  Human
Technique:  RT-PCR
References:  9
Duodenum mucosa, jejunum mucosa, ileum mucosa, colon mucosa
Expression level:  High
Species:  Mouse
Technique:  Semiquantitative RT-PCR, Western immunoblotting
References:  4
Kidney, uterus, spleen, ileum, liver, skin, brain, heart, adrenal, lung
Species:  Mouse
Technique:  Northern blot
References:  9
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
Neurite retraction
Species:  Rat
Tissue:  Neuroblastoma
Response measured:  Increased neurite retraction in B103-p2y5 cells after LPA exposure
References:  17
Membrane blebbing
Species:  Rat
Tissue:  Liver
Response measured:  Increased membrane blebbing in RH7777-p2y5 hepatoma cells after LPA exposure
References:  17
Increased intracellular calcium when LPA6 was co-expressed with a promiscuous Gs protein, reduced forskolin-stimulated [cAMP]I, and ERK1/2 activation
Species:  Mouse
Tissue:  Liver
Response measured:  Increased intracellular calcium, reduced forskolin-stimulated [cAMP]I, and ERK1/2 activation
References:  17
Physiological Functions
LPA6 was identified as critical mediator for hair growth
Species:  Human
Tissue:  Hair follicles (skin, scalp, eyebrow)
References:  3,8-9,12
Physiological Consequences of Altering Gene Expression Comments
Lpar6 knockout mice have not yet been characterized, but are expected to have hypotrichosis/woolly hair.
Clinically-Relevant Mutations and Pathophysiology Comments
Other distinct missense mutations include D63V, I188F, and E189K [13], as well as deletion (c.172-175delAACT; 177delG; p.N58-L59delinsCfsX88) [14].


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1. Azeem Z, Jelani M, Naz G, Tariq M, Wasif N, Kamran-Ul-Hassan Naqvi S, Ayub M, Yasinzai M, Amin-Ud-Din M, Wali A et al.. (2008) Novel mutations in G protein-coupled receptor gene (P2RY5) in families with autosomal recessive hypotrichosis (LAH3). Hum. Genet.123 (5): 515-9. [PMID:18461368]

2. Azhar A, Tariq M, Baig SM, Dahl N, Klar J. (2012) A novel mutation in lysophosphatidic acid receptor 6 gene in autosomal recessive hypotrichosis and evidence for a founder effect. Eur J Dermatol22 (4): 464-6. [PMID:22531990]

3. Horev L, Saad-Edin B, Ingber A, Zlotogorski A. (2010) A novel deletion mutation in P2RY5/LPA(6) gene cause autosomal recessive woolly hair with hypotrichosis. J Eur Acad Dermatol Venereol24 (7): 858-9. [PMID:20015179]

4. Lee M, Choi S, Halldén G, Yo SJ, Schichnes D, Aponte GW. (2009) P2Y5 is a G(alpha)i, G(alpha)12/13 G protein-coupled receptor activated by lysophosphatidic acid that reduces intestinal cell adhesion. Am. J. Physiol. Gastrointest. Liver Physiol.297 (4): G641-54. [PMID:19679818]

5. Li Q, Schachter JB, Harden TK, Nicholas RA. (1997) The 6H1 orphan receptor, claimed to be the p2y5 receptor, does not mediate nucleotide-promoted second messenger responses. Biochem. Biophys. Res. Commun.236: 455-460. [PMID:9240460]

6. Mahmoudi H, Tug E, Parlak AH, Atasoy HI, Ludwig M, Polat M, Pasternack SM, Betz RC. (2012) Identification of an Alu-mediated 12.2-kb deletion of the complete LPAR6 (P2RY5) gene in a Turkish family with hypotrichosis and woolly hair. Exp. Dermatol.21 (6): 469-71. [PMID:22621192]

7. Nakamura M, Tokura Y. (2009) Congenital woolly hair without P2RY5 mutation. Dermatoendocrinol1 (1): 58-9. [PMID:20046591]

8. Pasternack SM, Murugusundram S, Eigelshoven S, Müller M, Kruse R, Lehmann P, Betz RC. (2009) Novel mutations in the P2RY5 gene in one Turkish and two Indian patients presenting with hypotrichosis and woolly hair. Arch. Dermatol. Res.301 (8): 621-4. [PMID:19529952]

9. Pasternack SM, von Kügelgen I, Aboud KA, Lee YA, Rüschendorf F, Voss K, Hillmer AM, Molderings GJ, Franz T, Ramirez A, Nürnberg P, Nöthen MM, Betz RC. (2008) G protein-coupled receptor P2Y5 and its ligand LPA are involved in maintenance of human hair growth. Nat. Genet.40 (3): 329-34. [PMID:18297070]

10. Pasternack SM, von Kügelgen I, Müller M, Oji V, Traupe H, Sprecher E, Nöthen MM, Janecke AR, Betz RC. (2009) In vitro analysis of LIPH mutations causing hypotrichosis simplex: evidence confirming the role of lipase H and lysophosphatidic acid in hair growth. J. Invest. Dermatol.129 (12): 2772-6. [PMID:19536142]

11. Petukhova L, Sousa Jr EC, Martinez-Mir A, Vitebsky A, Dos Santos LG, Shapiro L, Haynes C, Gordon D, Shimomura Y, Christiano AM. (2008) Genome-wide linkage analysis of an autosomal recessive hypotrichosis identifies a novel P2RY5 mutation. Genomics92 (5): 273-8. [PMID:18692127]

12. Shimomura Y, Garzon MC, Kristal L, Shapiro L, Christiano AM. (2009) Autosomal recessive woolly hair with hypotrichosis caused by a novel homozygous mutation in the P2RY5 gene. Exp. Dermatol.18 (3): 218-21. [PMID:18803659]

13. Shimomura Y, Wajid M, Ishii Y, Shapiro L, Petukhova L, Gordon D, Christiano AM. (2008) Disruption of P2RY5, an orphan G protein-coupled receptor, underlies autosomal recessive woolly hair. Nat. Genet.40 (3): 335-9. [PMID:18297072]

14. Tariq M, Ayub M, Jelani M, Basit S, Naz G, Wasif N, Raza SI, Naveed AK, ullah Khan S, Azeem Z et al.. (2009) Mutations in the P2RY5 gene underlie autosomal recessive hypotrichosis in 13 Pakistani families. Br. J. Dermatol.160 (5): 1006-10. [PMID:19292720]

15. von Kügelgen I. (2006) Pharmacological profiles of cloned mammalian P2Y-receptor subtypes. Pharmacol. Ther.110 (3): 415-32. [PMID:16257449]

16. Webb TE, Kaplan MG, Barnard EA. (1996) Identification of 6H1 as a P2Y purinoceptor: P2Y5. Biochem. Biophys. Res. Commun.219: 105-110. [PMID:8619790]

17. Yanagida K, Masago K, Nakanishi H, Kihara Y, Hamano F, Tajima Y, Taguchi R, Shimizu T, Ishii S. (2009) Identification and characterization of a novel lysophosphatidic acid receptor, p2y5/LPA6. J. Biol. Chem.284 (26): 17731-41. [PMID:19386608]

How to cite this page

Yun C. Yung, Jerold Chun, Chido Mpamhanga.
Lysophospholipid (LPA) receptors: LPA6 receptor. Last modified on 22/07/2014. Accessed on 05/03/2015. IUPHAR/BPS Guide to PHARMACOLOGY, http://www.guidetopharmacology.org/GRAC/ObjectDisplayForward?objectId=163.