X-group (possible homology)

59 triple barrel

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Ligands and drugs

1,119

Member domains

with ligand contacts (≤ 4 Å)

1.2% of members

with DrugDomain annotations

1.6% of members

with a DrugBank compound

0.8% 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 acids and derivatives	2	1.2	1.64×	not tested
Homogeneous metal compounds	5	3.9	1.29×	not tested
Lipids and lipid-like molecules	1	0.9	1.14×	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
DB00156	THR	Threonine	4
DB00160	ALA	Alanine	2

Most frequently bound compounds

PDB ligand	Name	Domains in contact
ZNmetal	ZINC ION	4
HGmetal	MERCURY (II) ION	2
4QM	(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-10,13-dimethyl-17-[(2R)-pentan-2-yl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,7,12-triol	1