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You can:

Check the GPCR table for details.
Go to the ligand list to see ligands that interacts with this GPCR.
Go to the individual ligand page for PubMed ID information by text mining.
Download a TSV version of all interaction data.
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GPCR

Name	Lysophosphatidic acid receptor 1
Species	Rattus norvegicus (Rat)
Gene	Lpar1
Synonym	Lysophosphatidic acid receptor Edg-2 Lpar1 LPA1 receptor LPA-1 LPA receptor 1 GPR26 endothelial differentiation gene 2, lysophosphatidic acid G-protein-coupled receptor, 2 EDG2 VZG1 [ Show all ]
Disease	N/A for non-human GPCRs
Length	364
Amino acid sequence	MAAASTSSPVISQPQFTAMNEQQCFYNESIAFFYNRSGKYLATEWNTVSKLVMGLGITVCVFIMLANLLVMVAIYVNRRFHFPIYYLMANLAAADFFAGLAYFYLMFNTGPNTRRLTVSTWLLRQGLIDTSLTASVANLLAIAIERHITVFRMQLHTRMSNRRVVVVIVVIWTMAIVMGAIPSVGWNCICDIDHCSNMAPLYSDSYLVFWAIFNLVTFVVMVVLYAHIFGYVRQRTMRMSRHSSGPRRNRDTMMSLLKTVVIVLGAFIVCWTPGLVLLLLDVCCPQCDVLAYEKFFLLLAEFNSAMNPIIYSYRDKEMSATFRQILCCQRNENPNGPTEGSDRSASSLNHTILAGVHSNDHSVV
UniProt	P61794
Protein Data Bank	N/A
GPCR-HGmod model	N/A
3D structure model	No available structures or models
BioLiP	N/A
Therapeutic Target Database	N/A
ChEMBL	CHEMBL4595
IUPHAR	N/A
DrugBank	N/A

Known ligands

You can:

Click GLASS IDs to check the association information.
Click ligand names to check details of the ligands.
Download a TSV version of all interaction information.
Download a SDF structure collection of all known ligands.

GLASS ID	Molecule	Formula	Molecular weight	H-bond acceptor / donor	XlogP	Lipinski's druglikeness
15755	CHEMBL245895	C25H24ClNO4S	469.98	5 / 2	5.6	No
19349	CHEMBL245295	C21H21ClN2O6S2	496.977	8 / 2	3.5	Yes
26405	CHEMBL394038	C22H21ClN2O7S	492.927	8 / 2	2.8	Yes
36917	CHEMBL246928	C22H21ClN2O5S	460.929	7 / 2	4.1	Yes
47626	CHEMBL246942	C22H21ClN2O5S	460.929	7 / 2	4.6	Yes
71483	CHEMBL383362	C21H36O6P-	415.487	6 / 1	4.7	Yes
101763	CHEMBL199472	C21H40O5PS-	435.58	6 / 1	7.7	No
101767	CHEMBL425218	C21H40O5PS-	435.58	6 / 1	7.7	No
101770	CHEMBL200003	C21H40O5PS-	435.58	6 / 1	7.7	No
101774	CHEMBL427014	C21H40O5PS-	435.58	6 / 1	7.7	No
101775	CHEMBL199400	C21H40O5PS-	435.58	6 / 1	7.7	No
109235	CHEMBL199472	C21H40KO5PS	474.678	6 / 1	N/A	N/A
109238	CHEMBL425218	C21H40KO5PS	474.678	6 / 1	N/A	N/A
109241	CHEMBL427014	C21H40KO5PS	474.678	6 / 1	N/A	N/A
109242	CHEMBL200003	C21H40KO5PS	474.678	6 / 1	N/A	N/A
109246	CHEMBL199400	C21H40KO5PS	474.678	6 / 1	N/A	N/A
162206	CHEMBL246527	C23H23ClN2O5	442.896	6 / 2	4.8	Yes
190302	Ki16425	C23H23ClN2O5S	474.956	7 / 2	4.5	Yes
245086	CHEMBL246735	C22H20ClN3O6	457.867	7 / 3	2.7	Yes
269088	CHEMBL381470	C16H32KO6P	390.498	6 / 1	N/A	N/A
293490	CHEMBL381470	C16H32O6P-	351.4	6 / 1	4.2	Yes
307296	CHEMBL246943	C22H25ClN2O5S	464.961	7 / 2	3.7	Yes
307706	CHEMBL247959	C21H23ClN2O5S	450.934	7 / 2	3.2	Yes
311659	CHEMBL246929	C22H21ClN2O5S	460.929	7 / 2	4.1	Yes
345643	CHEMBL199380	C24H40KO6P	494.65	6 / 1	N/A	N/A
351884	CHEMBL246734	C25H27ClN2O5	470.95	6 / 2	5.6	No
360118	CHEMBL373007	C21H40O6P-	419.519	6 / 1	6.0	No
360122	CHEMBL382116	C21H40O6P-	419.519	6 / 1	6.0	No
374291	CHEMBL199380	C24H40O6P-	455.552	6 / 1	6.4	No
397779	CHEMBL373007	C21H40KO6P	458.617	6 / 1	N/A	N/A
397783	CHEMBL382116	C21H40KO6P	458.617	6 / 1	N/A	N/A
429905	CHEMBL383362	C21H36KO6P	454.585	6 / 1	N/A	N/A