X-group (possible homology)

3483 P2X purinoceptor

Open in classification tree →

Ligands and drugs

188

Member domains

145

with ligand contacts (≤ 4 Å)

77.1% of members

with DrugDomain annotations

28.7% of members

with a DrugBank compound

27.7% 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.

Proteins with classified ligands

Superclasses bound (of 23)

—

Superclasses per 20 proteins

fewer than 20 proteins: too few to compare at equal depth

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
Benzenoids	3	0.4	6.94×	not tested
Organic oxygen compounds	6	1.2	5.09×	not tested
Nucleosides, nucleotides, and analogues	5	1.6	3.06×	not tested
Organoheterocyclic compounds	2	0.9	2.20×	not tested
Organic acids and derivatives	2	0.9	2.19×	not tested
Homogeneous metal compounds	3	2.9	1.03×	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
DB00141	NAG	N-Acetylglucosamine	51
DB00171	ATP	ATP	17
DB02524	128	2',3'-O-{4-[Hydroxy(oxido)-λ5-azanylidene]-2,6-dinitro-2,5-cyclohexadiene-1,1-diyl}adenosine 5'-(tetrahydrogen triphosphate)	4
DB02431	CTP	Cytidine-5'-Triphosphate	1
DB02810	MHA	N-(2-Acetamido)Iminodiacetic Acid	1
DB09119	—	—	1
DB14575	—	—	1
DB15097	AF9	Gefapixant	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	136
ATP	ADENOSINE-5'-TRIPHOSPHATE	45
PLM	PALMITIC ACID	33
NAmetal	SODIUM ION	30
MGmetal	MAGNESIUM ION	28
A1ALI	4,4',4'',4'''-{carbonylbis[azanediylbenzene-5,1,3-triylbis(carbonylazanediyl)]}tetra(benzene-1,3-disulfonic acid)	9
CAmetal	CALCIUM ION	7
CLR	CHOLESTEROL	6
P6E	N-[4-(3-chloranylphenoxy)-3-sulfamoyl-phenyl]-2-phenyl-ethanamide	6
Q3G	O-[(R)-[(2S)-2-(hexadecanoyloxy)-3-(octadecanoyloxy)propoxy](hydroxy)phosphoryl]-D-serine	6
128	SPIRO(2,4,6-TRINITROBENZENE[1,2A]-2O',3O'-METHYLENE-ADENINE-TRIPHOSPHATE	4
7RV	N-{[4-(4-phenylpiperazin-1-yl)oxan-4-yl]methyl}-2-(phenylsulfanyl)pyridine-3-carboxamide	4
A1AQX	Camlipixant	4
A1D8Z	3,5-bis(trifluoromethyl)aniline	4
20V	3-[(E)-{4-formyl-5-hydroxy-6-methyl-3-[(phosphonooxy)methyl]pyridin-2-yl}diazenyl]-7-nitronaphthalene-1,5-disulfonicacid	3
7S1	N-cyano-N'-[(1R)-1-phenylethyl]-N''-quinolin-5-ylguanidine	3
A1INJ	1-azanyl-4-[(3-carboxy-4-phenylazanyl-phenyl)amino]-9,10-bis(oxidanylidene)anthracene-2-carboxylic acid	3
A1L0I	JNJ-54175446	3
A1L0P	PSFL1191	3
A1L2M	4-[2-cyclopropyl-7-[[(1~{R})-1-naphthalen-2-ylethyl]amino]-[1,2,4]triazolo[1,5-a]pyrimidin-5-yl]piperazine-1-carboxamide	3