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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	Muscarinic acetylcholine receptor M3
Species	Mus musculus (Mouse)
Gene	Chrm3
Synonym	cholinergic receptor, muscarinic 3 cholinergic receptor, muscarinic 3, cardiac Chrm-3 cholinergic receptor M3 receptor M3R Mm3 mAChR HM4 [ Show all ]
Disease	N/A for non-human GPCRs
Length	589
Amino acid sequence	MTLHSNSTTSPLFPNISSSWVHSPSEAGLPLGTVSQLDSYNISQTSGNFSSNDTSSDPLGGHTIWQVVFIAFLTGFLALVTIIGNILVIVAFKVNKQLKTVNNYFLLSLACADLIIGVISMNLFTTYIIMNRWALGNLACDLWLSIDYVASNASVMNLLVISFDRYFSITRPLTYRAKRTTKRAGVMIGLAWVISFVLWAPAILFWQYFVGKRTVPPGECFIQFLSEPTITFGTAIAAFYMPVTIMTILYWRIYKETEKRTKELAGLQASGTEAEAENFVHPTGSSRSCSSYELQQQGTKRSSRRKYGGCHFWFTTKSWKPSAEQMDQDHSSSDSWNNNDAAASLENSASSDEEDIGSETRAIYSIVLKLPGHSTILNSTKLPSSDNLQVPDKDLGTMDVERNAHKLQAQKSMDDRDNCQKDFSKLPIQLESAVDTAKTSDTNSSVDKTTAALPLSFKEATLAKRFALKTRSQITKRKRMSLIKEKKAAQTLSAILLAFIITWTPYNIMVLVNTFCDSCIPKTYWNLGYWLCYINSTVNPVCYALCNKTFRTTFKMLLLCQCDKRKRRKQQYQQRQSVIFHKRVPEQAL
UniProt	Q9ERZ3
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	CHEMBL5105
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
6616	carbachol	C6H15ClN2O2	182.648	3 / 1	N/A	N/A
6914	CHEMBL1201912	C16H24N2O7	356.375	8 / 2	N/A	N/A
13062	158142-45-1	C6H10N2O2	142.158	3 / 1	-0.9	Yes
13937	CHEMBL1201901	C15H24N2O6	328.365	7 / 3	N/A	N/A
25723	114724-56-0	C9H13N3O	179.223	4 / 0	0.8	Yes
27766	CHEMBL1201924	C14H21FN2O5	316.329	7 / 2	N/A	N/A
27767	CHEMBL1201923	C14H21FN2O5	316.329	7 / 2	N/A	N/A
30782	CHEMBL1201914	C15H24N2O6	328.365	7 / 3	N/A	N/A
34935	CHEMBL1178347	C8H12N4O2	196.21	5 / 1	-1.1	Yes
36051	CHEMBL1201908	C13H21N3O5	299.327	7 / 3	N/A	N/A
37031	CHEMBL538467	C6H11ClN2O2	178.616	3 / 2	N/A	N/A
38984	CHEMBL1201907	C12H18N2O5	270.285	6 / 2	N/A	N/A
52256	CHEMBL1183133	C8H12N4OS	212.271	5 / 1	-0.3	Yes
59703	UNII-KU4UTQ0410	C10H13F3N4O3	294.234	9 / 2	N/A	N/A
68763	CHEMBL1201919	C17H26N2O7	370.402	8 / 2	N/A	N/A
70761	CHEMBL1201904	C20H24N2O7	404.419	8 / 2	N/A	N/A
77203	CHEMBL1201900	C15H24N2O6	328.365	7 / 3	N/A	N/A
99511	CHEMBL1201917	C16H26N2O6	342.392	7 / 3	N/A	N/A
109923	CHEMBL11095	C13H20N2O3	252.314	4 / 1	-2.4	Yes
116427	arecoline	C8H13NO2	155.197	3 / 0	0.3	Yes
125947	Oxotremorine 1	C11H18N2O	194.278	2 / 0	0.3	Yes
138648	UNII-9F064NJ81D	C8H12N4O	180.211	4 / 1	0.1	Yes
145266	CHEMBL1201903	C17H26N2O7	370.402	8 / 2	N/A	N/A
155987	XANOMELINE	C14H23N3OS	281.418	5 / 0	3.3	Yes
156443	CHEMBL1201902	C14H22N2O6	314.338	7 / 3	N/A	N/A
161890	5-propargyloxycarbonyl-1,4,5,6-tetrahydropyrimidine hydrochloride	C8H11ClN2O2	202.638	3 / 2	N/A	N/A
166890	ZINC1535055	C8H10N2O2	166.18	3 / 1	-0.8	Yes
208974	CID 44457650	C10H13F3N4O4	310.233	10 / 2	N/A	N/A
220973	158930-48-4	C7H12N2O2	156.185	3 / 1	-1.0	Yes
239544	CHEMBL1201921	C13H20N2O6	300.311	7 / 3	N/A	N/A
241411	CHEMBL1201925	C14H22N2O6	314.338	7 / 3	N/A	N/A
241412	CHEMBL1201910	C14H22N2O6	314.338	7 / 3	N/A	N/A
257930	methyl 6-amino-2,3,4,5-tetrahydropyridine-3-carboxylate hydrochloride	C7H13ClN2O2	192.643	3 / 2	N/A	N/A
270194	CHEMBL1201922	C15H24N2O6	328.365	7 / 2	N/A	N/A
272841	CHEMBL376781	C23H24FN3OS2	441.583	5 / 1	4.0	Yes
280666	CHEMBL1201918	C14H22N2O6	314.338	7 / 3	N/A	N/A
280881	CID 44457579	C10H13F3N4O3S	326.294	10 / 2	N/A	N/A
303765	Oxotremorine	C12H18N2O	206.289	2 / 0	0.4	Yes
309126	CHEMBL1201916	C17H26N2O7	370.402	8 / 2	N/A	N/A
310393	SCHEMBL8305377	C7H10N4O	166.184	4 / 1	-0.4	Yes
311947	CHEMBL1201906	C20H26N2O8S	454.494	9 / 2	N/A	N/A
314433	CHEMBL541398	C7H13ClN2O2	192.643	3 / 2	N/A	N/A
326916	CHEMBL1201905	C14H22N2O8S	378.396	9 / 2	N/A	N/A
339607	CHEMBL557795	C9H13ClN2O2	216.665	3 / 2	N/A	N/A
344128	ZINC3786169	C7H12N2O2	156.185	3 / 1	-0.5	Yes
349317	CHEMBL1201920	C14H22N2O5	298.339	6 / 2	N/A	N/A
356889	CHEMBL1201926	C13H19FN2O5	302.302	7 / 2	N/A	N/A
359638	SCHEMBL8307259	C9H11F3N4O3	280.207	9 / 2	N/A	N/A
360939	Carbamylcholine	C6H15N2O2+	147.198	2 / 1	-0.4	Yes
380468	aceclidine	C9H15NO2	169.224	3 / 0	0.7	Yes
394308	CHEMBL557795	C9H12N2O2	180.207	3 / 1	-0.9	Yes
407220	CHEMBL1201913	C15H23N3O6	341.364	7 / 2	N/A	N/A