X-group (possible homology)

3543 Acid-activated urea channel

Open in classification tree →

Ligands and drugs

183

Member domains

with ligand contacts (≤ 4 Å)

14.2% of members

with DrugDomain annotations

14.2% of members

with a DrugBank compound

6.0% 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	0.25×observed / expected4×	Ratio	Significance
Lipids and lipid-like molecules	3	0.3		9.11×	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
DB02451	BNG	B-nonylglucoside	5
DB03796	PLM	Palmitic Acid	3

Most frequently bound compounds

PDB ligand	Name	Domains in contact
XP4	1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHATE	15
78M	(2S)-2,3-DIHYDROXYPROPYL(7Z)-PENTADEC-7-ENOATE	6
BNG	nonyl beta-D-glucopyranoside	5
PLM	PALMITIC ACID	3