X-group (possible homology)

5001 Family A G protein-coupled receptor-like

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Ligands and drugs

14,372

Member domains

2,539

with ligand contacts (≤ 4 Å)

17.7% of members

1,835

with DrugDomain annotations

12.8% of members

1,034

with a DrugBank compound

7.2% of members

Aggregated over all current member domains of this group. Drug annotations come from DrugDomain; buffers and crystallization additives are excluded from the tables below.

Chemical profile

ClassyFire chemical superclasses of the ligands bound by this X-group's proteins, from DrugDomain annotations.

226

Proteins with classified ligands

Superclasses bound (of 23)

10.2

Superclasses per 20 proteins

broader than 95% of the 256 X-groups with enough proteins to compare (median 7.6)

The raw number of superclasses rises with the number of proteins sampled; the per-20 value compares X-groups at equal depth.

Superclass	Proteins	Expected	Ratio	Significance
Lipids and lipid-like molecules	199	24.8	8.02×	q < 0.0001
Benzenoids	58	16.3	3.56×	q < 0.0001
Organoheterocyclic compounds	80	34.3	2.33×	q < 0.0001
Organic nitrogen compounds	11	7.1	1.55×	q = 0.24
Organic acids and derivatives	44	34.5	1.28×	q = 0.12
Organic oxygen compounds	34	44.4	0.77×	q = 0.14
Homogeneous non-metal compounds	22	48.0	0.46×	q < 0.0001
Homogeneous metal compounds	21	109.4	0.19×	q < 0.0001
Nucleosides, nucleotides, and analogues	8	61.6	0.13×	q < 0.0001
Hydrocarbons	30	1.6	19×	not tested
Alkaloids and derivatives	14	0.8	18×	not tested
Organohalogen compounds	1	0.6	1.57×	not tested
Organosulfur compounds	3	4.6	0.65×	not tested
Phenylpropanoids and polyketides	3	4.6	0.65×	not tested

enriched (q < 0.05)depleted (q < 0.05)not significantnot tested (expected < 5)

Unit: a protein (UniProt accession) with a ligand-binding domain in this X-group, counted once per superclass. Expected counts use each superclass's frequency across all ligand-binding X-groups; significance is Fisher's exact test with Benjamini–Hochberg correction. Buffers and crystallization additives are excluded. ECOD v295.2; the method follows the ECOD 2027 update, whose published figures used a slightly different artifact filter.

DrugBank compounds

DrugBank	PDB ligand	Name	Domains
DB04540	CLR	Cholesterol	295
DB03796	PLM	Palmitic Acid	129
DB03646	L2P	2,3-di-O-phytanyl-sn-glycerol	71
DB08558	SOG	2-HYDROXYMETHYL-6-OCTYLSULFANYL-TETRAHYDRO-PYRAN-3,4,5-TRIOL	40
DB00141	NAG	N-Acetylglucosamine	36
DB02451	BNG	B-nonylglucoside	36
DB02293	L3P	(2S)-2,3-bis{[(3R,7R)-3,7,11,15-tetramethylhexadecyl]oxy}propyl (2R)-2-hydroxy-3-[(hydroxyphosphinato)oxy]propyl phosphate	33
DB01238	—	Aripiprazole	32
DB08770	ZMA	4-{2-[(7-amino-2-furan-2-yl[1,2,4]triazolo[1,5-a][1,3,5]triazin-5-yl)amino]ethyl}phenol	30
DB00408	—	—	25
DB03831	MPG	[(Z)-octadec-9-enyl] (2R)-2,3-bis(oxidanyl)propanoate	23
DB00246	—	—	22
DB00363	—	—	21
DB14185	—	—	21
DB00248	—	—	19
DB01200	—	Bromocriptine	19
DB01224	—	—	19
DB06216	—	—	19
DB01403	—	—	17
DB00696	—	Ergotamine	16

Most frequently bound compounds

PDB ligand	Name	Domains in contact
RET	RETINAL	719
CLR	CHOLESTEROL	479
OLC	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate	398
OLA	OLEIC ACID	357
LFA	EICOSANE	286
NAmetal	SODIUM ION	263
PLM	PALMITIC ACID	148
CL	CHLORIDE ION	92
L2P	2,3-DI-PHYTANYL-GLYCEROL	72
Y01	CHOLESTEROL HEMISUCCINATE	72
D10	DECANE	65
OLB	(2S)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate	63
OCT	N-OCTANE	54
ZNmetal	ZINC ION	54
C14	TETRADECANE	52
LI1	1-[2,6,10.14-TETRAMETHYL-HEXADECAN-16-YL]-2-[2,10,14-TRIMETHYLHEXADECAN-16-YL]GLYCEROL	51
DD9	nonane	47
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	44
22B	BACTERIORUBERIN	39
SOG	octyl 1-thio-beta-D-glucopyranoside	39