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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	Somatostatin receptor type 4
Species	Rattus norvegicus (Rat)
Gene	Sstr4
Synonym	SRIF2B SS-4-R SS4-R SS4R SST4 receptor
Disease	N/A for non-human GPCRs
Length	384
Amino acid sequence	MNTPATLPLGGEDTTWTPGINASWAPDEEEDAVRSDGTGTAGMVTIQCIYALVCLVGLVGNALVIFVILRYAKMKTATNIYLLNLAVADELFMLSVPFVASAAALRHWPFGAVLCRAVLSVDGLNMFTSVFCLTVLSVDRYVAVVHPLRAATYRRPSVAKLINLGVWLASLLVTLPIAVFADTRPARGGEAVACNLHWPHPAWSAVFVIYTFLLGFLLPVLAIGLCYLLIVGKMRAVALRAGWQQRRRSEKKITRLVLMVVTVFVLCWMPFYVVQLLNLFVTSLDATVNHVSLILSYANSCANPILYGFLSDNFRRSFQRVLCLRCCLLETTGGAEEEPLDYYATALKSRGGPGCICPPLPCQQEPMQAEPACKRVPFTKTTTF
UniProt	P30937
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	N/A
IUPHAR	358
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
16300	BDBM84629	C71H81N11O9	1232.5	11 / 12	8.1	No
19010	SA V	C46H62N8O6	823.052	8 / 8	4.6	No
28612	SA II	C38H54N8O6	718.9	8 / 9	2.6	No
39297	L-362855	C57H70N10O8	1023.25	9 / 11	5.7	No
46043	BDBM82458	C52H68N10O9	977.177	11 / 12	3.4	No
50027	CHEMBL268112	C67H79N11O9	1182.44	11 / 12	5.6	No
52240	BDBM84620	C54H70N10O10S2	1083.33	14 / 13	2.9	No
58024	Octreotide	C49H66N10O10S2	1019.25	14 / 13	1.0	No
59019	BDBM82466	C55H68ClN9O8	1018.65	9 / 10	6.2	No
61297	CHEMBL2369699	C43H59N9O8S2	894.12	11 / 10	2.1	No
65484	BDBM84640	C71H80ClN11O9	1266.94	11 / 12	8.8	No
78637	CHEMBL421362	C44H54N8O7	806.965	8 / 8	3.4	No
96178	Somatostatin 28	C137H207N41O39S3	3148.59	48 / 46	-15.2	No
106548	BDBM84625	C49H67N11O10	970.142	12 / 13	-0.5	No
106955	BDBM84623	C55H64N10O9S2	1073.3	13 / 12	3.8	No
118923	BIM 23052	C61H75N11O10	1122.34	12 / 13	2.7	No
128023	BDBM84624	C61H74ClN11O11	1172.78	13 / 14	3.7	No
131135	BDBM82254	C41H60N10O9S2	901.112	13 / 14	0.0	No
148744	BIM-23023	C49H65N11O10S2	1032.25	14 / 13	0.8	No
160211	BDBM84644	C44H58N8O6	794.998	8 / 8	3.6	No
174021	BDBM82454	C44H56N8O7	808.981	8 / 7	3.4	No
174352	BDBM84617	C60H74ClN11O8	1112.77	10 / 11	6.5	No
183482	BDBM84616	C47H62ClN9O8	916.518	10 / 10	2.5	No
200928	SA IV	C44H58N8O6	794.998	8 / 8	3.5	No
213987	BDBM82255	C57H69N11O8S2	1100.37	13 / 12	3.7	No
223710	SOMATOSTATIN	C76H104N18O19S2	1637.9	24 / 22	-3.1	No
223721	Somatostatin-14	C76H104N18O19S2	1637.9	24 / 22	-3.1	No
223729	SOMATOSTATIN	C76H104N18O19S2	1637.9	24 / 22	-3.1	No
228999	CHEMBL413535	C44H56N8O7	808.981	8 / 8	3.9	No
229007	BDBM81766	C44H56N8O7	808.981	8 / 8	3.9	No
261035	BIM-23058	C62H77N11O10	1136.36	12 / 13	4.7	No
268944	Lanreotide	C54H69N11O10S2	1096.33	14 / 13	2.5	No
275733	BDBM82257	C61H75N11O10	1122.34	12 / 13	4.4	No
276240	BDBM84619	C69H83ClN12O13	1323.94	15 / 16	4.1	No
293364	BDBM82462	C54H68N12O12S2	1141.33	15 / 15	1.5	No
316656	BIM-23027	C43H54N8O7	794.954	8 / 8	3.5	No
326209	CH-275	C74H96N14O15S2	1485.79	20 / 18	1.6	No
332967	BDBM82461	C59H73N11O9	1080.3	11 / 12	5.0	No
345535	SCHEMBL1579410	C62H76ClN11O10	1170.81	12 / 13	5.3	No
345922	CHEMBL3350185	C62H76N12O12	1181.36	14 / 13	4.5	No
348765	cycloantagonist SA	C42H55N7O5	737.946	7 / 7	4.8	No
357457	BDBM84626	C55H64N10O8S2	1057.3	12 / 11	4.3	No
361203	BIM 23056	C71H81N11O9	1232.5	11 / 12	8.1	No
361648	BDBM84621	C61H69N11O9S2	1164.41	13 / 12	6.1	No
555101	SS14	C63H88N16O16S2	1389.61	21 / 19	-4.1	No
383352	BDBM84630	C56H66N10O9S2	1087.32	13 / 12	4.2	No
390652	BDBM82456	C45H57N9O8S2	916.126	11 / 10	3.0	No
394983	BDBM84627	C56H72ClN11O9	1078.71	11 / 12	4.2	No
400290	CHEMBL264562	C61H74ClN11O9	1140.78	11 / 12	5.1	No
416684	Bim-23003	C71H95ClN16O17S2	1544.21	22 / 20	-1.6	No
435785	BDBM84638	C58H71N11O10	1082.27	12 / 13	3.4	No