X-group (possible homology)

3223 Amiloride-sensitive cation channel 2

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Ligands and drugs

291

Member domains

with ligand contacts (≤ 4 Å)

29.6% of members

with DrugDomain annotations

25.1% of members

with a DrugBank compound

23.7% 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
Organic oxygen compounds	4	0.8	5.09×	not tested
Homogeneous non-metal compounds	2	0.9	2.36×	not tested
Lipids and lipid-like molecules	1	0.4	2.28×	not tested
Organoheterocyclic compounds	1	0.6	1.65×	not tested
Homogeneous metal compounds	2	1.9	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	62
DB00594	—	Amiloride	7
DB00384	—	Triamterene	4
DB03740	NDG	N-acetyl-alpha-D-glucosamine	1
DB08838	—	Agmatine	1

Most frequently bound compounds

PDB ligand	Name	Domains in contact
NAG	2-acetamido-2-deoxy-beta-D-glucopyranose	81
CL	CHLORIDE ION	33
NAmetal	SODIUM ION	9
CAmetal	CALCIUM ION	6
BAmetal	BARIUM ION	3
Kmetal	POTASSIUM ION	3
UZG	2-[4-(3,4-dimethoxyphenoxy)phenyl]-1H-benzimidazole-6-carboximidamide	3
Y01	CHOLESTEROL HEMISUCCINATE	3
CSmetal	CESIUM ION	2
P6G	HEXAETHYLENE GLYCOL	2
AMR	3,5-DIAMINO-N-(AMINOIMINOMETHYL)-6-CHLOROPYRAZINECARBOXAMIDE	1
NDG	2-acetamido-2-deoxy-alpha-D-glucopyranose	1